Electric Arc Welding Procedure: The Complete Guide to Processes, WPS, and Technique

What Is an Electric Arc Welding Procedure?

You’ve got two pieces of steel, a stinger in your hand, and then that sharp crackle that tells you the arc has struck. In that instant, thousands of degrees of heat melt base metal and filler, the arc shields the molten puddle from the air, and a joint begins to form. Done well, it can hold a bridge, a pipeline, or a pickup truck frame for decades. Done by guesswork, that same joint can crack, porosity up, or fail inspection before it ever sees service. The line between the two usually comes down to following a real procedure.

That word — procedure — carries two meanings in welding, and mixing them up causes a lot of confusion.

The Two Meanings of “Procedure”

In everyday shop talk, an electric arc welding procedure is simply how you weld: the rod angle you favor, the travel speed that feels right, the way you step the puddle. It’s the muscle memory a welder builds over years. If you’re still forming that skill, our guide on welding practice walks through how to build it deliberately rather than by accident.

In the formal sense, a procedure is a written, qualified document. It’s a Welding Procedure Specification (WPS) — the controlled piece of paper that states exactly which process, filler, current, polarity, position, preheat, and technique must be used to make an acceptable weld on a given joint. The colloquial version lives in the welder’s hands. The formal version lives in a binder and is signed off by an engineer. This article is about both, and how they connect.

What Makes It “Arc” Welding

An arc welding process is defined as one in which coalescence is produced by heating with an electric arc between an electrode and the work, according to the AWS A3.0 Standard Welding Terms and Definitions. In plain language: you strike a controlled electrical discharge across a gap, and that discharge is hot enough to melt metal. The electrode may be consumable (it becomes part of the weld, like in stick or MIG) or non-consumable (it just carries the current, like tungsten in TIG).

The physics is the same at heart, whether you’re running a buzz box in a garage or a robot in a fabrication plant. Current flows across the gap, ionizes the air into plasma, and creates temperatures that melt steel in seconds. The arc also does something less obvious but equally important — it generates a shielding envelope of gas, vaporized flux, or slag that keeps oxygen and nitrogen out of the molten pool. Contamination there is what turns a clean weld into a brittle, porous failure.

Electric arc welding is the most widely used type of fusion welding, and fusion welding itself splits into three broad categories: electric arc, gas, and thermit, as described in the OSHA Fact Sheet FS-3647. Arc welding dominates because it’s fast, portable, works on thick and thin material, and scales from a single hobbyist to automated production lines running robotic submerged arc welding.

One more layer matters here: qualification. Under OSHA 29 CFR 1910.254, workers designated to operate arc welding equipment must be properly instructed and qualified. That’s the legal backbone behind the idea that welding isn’t casual — the settings, the technique, and the person running them all sit inside a system.

Where This Article Goes

Over the sections ahead we’ll compare the main arc processes — stick, MIG, flux-cored, TIG, and submerged arc — and unpack the variables that actually change a weld: current, polarity, amperage, voltage, and travel speed. We’ll look at how a WPS and its supporting Procedure Qualification Record get built, how to execute a procedure step by step, and how to stay safe while you do it. You’ll also see the mistakes and defects that trip up even experienced hands, plus tips to tighten your consistency.

Whether you’re choosing polarity for a flux-core bead or dialing in a contact tip on a MIG gun, the goal stays the same: make the weld repeatable, not lucky. Let’s start by getting our terms straight.

The Main Electric Arc Welding Processes Compared

Walk into any fabrication shop and you’ll hear a dozen different arcs, each with its own rhythm. The crackle of stick, the bacon-frying hiss of MIG, the steady hum of TIG — they’re all electric arc welding, but the way each process creates, shields, and controls the arc changes everything about where it belongs. Here’s how the five workhorses stack up.

Shielded Metal Arc Welding (SMAW / Stick)

A covered electrode carries the current, melts into the joint, and supplies both filler metal and shielding. As the flux coating burns, it releases gas that pushes air away from the molten pool and leaves a slag blanket behind. That self-shielding design makes stick the go-to for outdoor work, repairs, pipelines, and structural steel where wind would blow a gas shield away. Deposition rates are modest and you stop to change rods, but the equipment is rugged and cheap. OSHA notes that SMAW’s covered electrode provides both flux shielding and filler material in its welding fact sheet.

Gas Metal Arc Welding (GMAW / MIG)

GMAW feeds a continuous consumable wire electrode through a gun while an external shielding gas — usually argon mixed with CO₂ — protects the arc. Because the wire never stops, MIG is fast, clean, and easy to automate, which is why it dominates production shops, auto body work, and thin-sheet fabrication. The weak spot is wind: outdoor welding needs a windbreak or a flux-cored alternative. Gun angle and a healthy contact tip matter more here than in any other process.

Flux-Cored Arc Welding (FCAW)

Flux-cored wire is a tubular electrode filled with flux that shields the arc from the inside, so it tolerates wind like stick yet runs continuously like MIG. It’s the heavyweight for structural steel, shipbuilding, and heavy fabrication, delivering high deposition and deep penetration. The trade-off is fume and slag. OSHA lists FCAW as the highest-fume arc process, ahead of SMAW and GMAW, so ventilation is non-negotiable — which is why many welders choose gasless flux-cored setups outdoors.

Gas Tungsten Arc Welding (GTAW / TIG)

TIG uses a non-consumable tungsten electrode and a separate filler rod, with shielding gas flowing around the torch. With no slag and almost no spatter, it produces the cleanest, most precise welds — ideal for stainless, aluminum, thin tubing, and aerospace work. It’s also the slowest and demands the most skill. On aluminum, current choice is everything; our guide to TIG welding polarity explains how DCEN, DCEP, and AC each behave.

Submerged Arc Welding (SAW)

SAW buries the arc under a blanket of granular flux, so there’s no visible arc, very little fume, and extremely high deposition. It’s nearly always automated and shines on thick plate, pressure vessels, pipe, and long straight seams. For heavy-duty repeat work, robotic submerged arc welding pairs the process with positioners to lay metal down fast and consistently.

A side-by-side look makes the trade-offs obvious.

Which Process Fits Your Job?

• Stick (SMAW): field repairs, dirty or rusty steel, windy sites, and quick one-off jobs.
• MIG (GMAW): high-volume production, thin sheet, and clean indoor fabrication.
• Flux-cored (FCAW): outdoor structural welding where you need MIG-like speed with stick-like wind resistance.
• TIG (GTAW): aerospace, sanitary stainless, and any weld that must look flawless.
• SAW: thick-plate, long, straight seams in a fixed, automated setup.

None of these processes is “best” in the abstract — the right answer depends on plate thickness, position, volume, filler availability, and how much fume and cleanup you can tolerate. Readers building skills should start with stick for arc control, then move to MIG; our guide to welding practice walks through drills that translate across every process. Indoors, match the process to your ventilation plan — fume rises from FCAW, then SMAW, then GMAW — and pair it with proper protective eyewear and fume control.

Core Variables: Current, Polarity, Amperage, Voltage, and Travel Speed

Strike an arc and you are already making decisions. Every knob, dial, and hand movement controls a variable that shapes the weld: how deep it bites, how wide it spreads, whether it fuses cleanly or leaves a defect waiting to fail. A real welding procedure doesn’t treat these as random preferences. It records them, because change one and the whole outcome shifts.

Think of these variables as the recipe. The process is the cuisine, but current type, polarity, amperage, voltage, travel speed, and electrode angles decide whether the plate tastes like a certified weld or a repair bill.

Current Type: AC Versus DC

Welding current comes in two flavors. Alternating current (AC) reverses direction many times a second, which helps break up arc blow and lets you weld on magnetized steel. Direct current (DC) flows one way, giving a steadier, smoother arc that many welders prefer for out-of-position work and thin material.

Not every electrode plays both games. According to the Wisconsin DOA filler metal selection guideline, an E6010 runs on DCEP only, E6011 accepts AC or DCEP, E7018 accepts AC or DCEP, and E7024 accepts AC, DCEP, or DCEN. Grab the wrong current and the arc sputters, sticks, or refuses to start.

There’s also a hard safety ceiling. OSHA 29 CFR 1910.254(b)(3) limits open-circuit voltage to 80 volts for manual AC arc welding and 100 volts for manual DC.

Polarity: DCEN and DCEP

Polarity describes which cable carries the heat. Direct current electrode negative (DCEN) sends more heat into the workpiece, producing deeper penetration and a narrower bead. Direct current electrode positive (DCEP) puts more heat into the electrode, giving better cleaning action and a wider, shallower profile.

DCEP is the standard choice for E7018 because it stabilizes the arc and drives good penetration. Stick and flux-cored welders live and die by this choice, and it matters just as much in TIG — see our breakdown of TIG welding polarity: DCEN, DCEP, and AC explained. Flux-cored work has its own rules worth studying in polarity for flux core welding: DCEN vs DCEP.

Amperage: The Heat Dial

Amperage sets raw heat. Too low and you get cold lap, poor fusion, and a bead that sits on top like frosting rather than melting in. Too high and you burn through thin metal, undercut the edges, and spatter everywhere. Every electrode size has a sweet spot — a 3/16″ E7018 runs much hotter than a 1/8″ rod, which is why our 3/16 E7018 amperage and technique guide exists.

Voltage and Arc Length

Voltage controls arc length, and arc length controls bead width and shape. A long arc raises voltage, widens the puddle, and increases spatter and porosity risk. A short arc lowers voltage, tightens the bead, and improves control — until you dip the electrode and stick.

In wire processes, voltage and wire speed work as a pair. Mismatch them and you get a stuttering, spattery mess or a bead that hums along perfectly. If you run gasless wire, the same balance applies; our guide to gasless MIG (flux-cored welding without gas) shows how to dial it in.

Travel Speed

Travel speed decides how much heat and metal land per inch of joint. Move too fast and the weld narrows, penetration drops, and you risk lack of fusion. Move too slow and the puddle piles up, overheats, and can cause overlap — a defect where weld metal rolls over the toe without fusing. Our overlap welding defect guide covers how to spot and fix it.

Electrode and Work Angles

Angle steers the arc and the puddle. A work angle near 45° to the joint splits heat evenly between both plates. A travel angle of 10–15° with a drag (push or pull) direction controls how the molten metal flows. Too steep and the arc digs in; too shallow and the puddle runs ahead of you.

Every one of these variables belongs on a welding procedure specification, because a qualified weld is a recorded weld. Get them wrong and no amount of steady hands will pass inspection. Get them right and you build consistency you can repeat on the next hundred joints.

Note: When in doubt, follow the WPS ranges — they exist precisely because these variables interact, and small changes compound quickly at the arc.

The WPS and PQR: Turning a Procedure into a Qualified Document

You can strike a beautiful arc and still fail an inspection—because inspectors don’t judge how a weld looks under your hood. They judge it against paper. That paper is the Welding Procedure Specification (WPS), and behind every valid WPS sits a Procedure Qualification Record (PQR). Together they turn a welder’s good intentions into a document that a client, a code, and a court can all trust.

What a WPS Actually Is

A WPS is a written recipe for making a specific weld. It records the controllable and measurable essential variables used on each joint—things like process, current, polarity, filler metal, preheat, and position. The American Institute of Steel Construction puts the stakes plainly: welds deposited out of compliance with the WPS may not provide the needed properties (AISC Solutions Center). In other words, the WPS isn’t bureaucracy—it’s the difference between a joint that’s merely stuck together and one that’s engineered.

Here’s the plain-English version: if the WPS says 1/8-inch E7018 at 120 amps DCEP, you run 1/8-inch E7018 at 120 amps DCEP. The reasoning behind those numbers matters—see how amperage and polarity settings drive E7018 technique for a practical example. The same logic spans processes; even a DCEN versus DCEP choice on flux core changes penetration and must be written down.

What a PQR Is—and Why It Exists

A WPS by itself is just a claim. A PQR is the evidence. It’s the record of the actual test weld that was made, cut, bent, and inspected to prove the procedure produces sound welds. You qualify a procedure once, record the variables and results on the PQR, then write a WPS from that data. Welders are then qualified to that WPS separately.

The order matters: test first, document second, then write the production recipe. Skipping the test and copying someone else’s numbers is how shops end up with a WPS that looks official but means nothing.

Essential, Nonessential, and Supplementary Variables

Not every variable carries equal weight. Under ASME BPV Code Section IX, variables are sorted into three buckets:

• Essential variables: Change one and you must requalify the procedure—process, base metal grouping, and filler metal classification often sit here.
• Nonessential variables: Change one and you only revise the WPS, no retest. Travel speed and electrode size are common examples.
• Supplementary essential variables: These apply only when notch toughness is required; they become essential for those jobs.

That structure keeps requalification proportionate—no retest for a minor tweak, but absolutely one when the metallurgy changes.

Prequalified vs. Qualified by Testing

Under AWS D1.1 you have two roads. A prequalified WPS relies on established combinations of process, position, and base metal already blessed by the code—no testing required if you stay inside its limits. Anything outside those limits must be qualified by testing, meaning you produce a coupon and document a PQR.

AWS D1.1 Table 6.5 lists the changes that require new qualification testing—things like a change in process, a change in position, or base metal outside the approved group (AISC Solutions Center). Those trigger points are where budgets get burned. Qualification tests in 2021 were reported to cost as much as $10,000 per procedure (AISC Solutions Center). That number is why shops plan procedures carefully—one careless variable change means a rejected weld, a retest, and a stalled job.

Reading a Standard WPS Form

The AWS D1.1 WPS/PQR Form N-1 is the template you’ll meet most often; you can download it from the American Welding Society. Read top to bottom, it captures process, joint design, electrical characteristics (current, polarity, amperage range, voltage), filler metals, preheat and interpass temperature, and pass-by-pass details—layer, process, and electrode for each bead.

Once you can read that form, you can read a weld’s future. Building the skills to execute what it demands is its own project—this guide to building real welding skills through deliberate practice covers that side, and knowing your consumables, like contact tip selection and wear, keeps the procedure running true on the floor. Because at the end of the day, a WPS is only as good as the hands that follow it.

Step-by-Step: Building and Executing an Arc Welding Procedure

A procedure only earns its keep when someone actually follows it on the shop floor. What works on the drawing board can fall apart the moment you strike an arc on dirty steel or mis-set polarity. Below is the same sequence I use whether I’m tacking a trailer frame in a driveway or qualifying a structural joint in a fab shop: understand the job, choose the tools, document the plan, prep the metal, weld in controlled passes, then verify. Skip a step and you’re gambling on luck instead of engineering.

1. Review the Job and Code Requirements

Start with the drawing, the base-metal spec, and any governing code. A pipeline falls under API 1104, structural steel under AWS D1.1, and pressure work under ASME BPVC Section IX. Each sets its own qualification demands, so confirm which one applies before you touch a machine. If the job is code-governed, the WPS must already be qualified before the first arc strikes — no exceptions.

2. Select the Process and Consumables

Match the process to thickness, position, and access. Shielded metal arc (SMAW) for field work and dirty steel, GMAW for speed on clean plate, and flux-cored where wind kills shielding gas — our guide to gasless MIG welding covers that trade-off well. Filler class and diameter come next; base-metal chemistry and joint strength dictate both. When running wire, tip condition matters more than most people admit, which is why contact tip selection and maintenance belongs in your setup routine.

3. Write or Select the WPS

The AWS D1.1 WPS form requires recording pass or weld layer, filler class and diameter, current type and polarity, amps or wire feed speed, volts, travel speed, and joint details. Whether you write one from scratch or pull a qualified procedure, confirm it covers your material and thickness range. The official form layout is published in the AWS WPS/PQR form, and the AISC also explains what a WPS must contain.

4. Prepare and Fit Up the Joint

Clean to bare metal — mill scale, oil, rust, and moisture all cause porosity. Cut bevels to spec, then set root gap and land consistently and tack the assembly. Poor fit-up forces you to fight the weld instead of running it. This is also where deliberate welding practice pays off, because fit-up judgment is learned, not guessed.

5. Set the Machine and Polarity

Dial in amperage and polarity per the WPS. OSHA’s standard for arc welding equipment notes that 1910.254(c) requires all machine connections be checked before starting operations to make sure they are properly made. A loose ground or swapped leads ruins the arc before you ever weld. If polarity confuses you, our explainer on DCEN vs DCEP for flux core breaks down which setup penetrates and which cleans.

6. Weld Root, Hot, Fill, and Cap Passes

Run the root with full penetration and controlled travel speed, follow with a hot pass to refine it, then build fill and cap layers to size. Typical SMAW course practice includes setting amperage and polarity, tacking plates, and running stringers in flat, horizontal, vertical, and overhead positions, according to the Lassen Community College WT-37 course outline. Keep your arc length, work angle, and travel speed steady through every pass.

7. Control Interpass Temperature

Let the joint cool between passes to stay within the WPS range. Too hot and mechanical properties suffer; too cold on some alloys invites cracking. A temperature stick or infrared gun keeps you honest.

8. Clean Between Passes

Chip slag, wire-brush, and inspect each pass before the next. Trapped slag between layers is one of the most common defects, and it’s invisible until it fails inspection. Cleanliness between passes is non-negotiable.

9. Inspect and Record

Check for undercut, porosity, overlap, and incomplete fusion, then log the completed parameters. Inspect to the acceptance criteria of your code, using visual inspection first and NDT where required.

Follow this sequence and the arc stops being a guess. It becomes a repeatable, documented process — the difference between a weld that passes and one that holds for decades.

Safety, Fume Control, and Personal Protection

After hours of dialing in an arc welding procedure, the most important part is not the bead itself, but making it home at the end of the day. The crackle of an electric arc produces more than heat, as it can expose a welder to electric shock, radiation, burns, fire, toxic fumes, and confined space hazards. For this reason, safety must be built into every procedure, not tacked on as an afterthought. A well-planned welding facility paired with proper controls will protect both the operator and those around them.

Electrical Safety and Fire Prevention

Electric shock is one of the deadliest risks in arc welding. With open circuit voltages present, even a moment of contact can be fatal. To mitigate this, all equipment must be properly grounded and inspected in accordance with OSHA 1910.254 and OSHA 1910.252. Cables should be free of cuts, insulation damage, or exposed conductors, and quick connect welding leads must be securely locked in place.

Fire is another constant threat. Sparks can travel far, so flammable materials must be removed from the work area before striking an arc. A Class ABC fire extinguisher should always be within reach, and hot work permits should be utilized when required. These preventative measures are especially crucial when working with high output processes, such as robotic submerged arc welding, as the heat envelope can be much larger than a manual setup.

Arc Radiation, Burns, and Eye Protection

The electric arc emits intense ultraviolet, infrared, and visible light. Without protection, this can result in arc flash burns to the skin, as well as “arc eye”, a painful corneal inflammation. The first line of defense is a properly rated welding helmet with the correct lens shade for the process and amperage. For those spending hours in the shop, investing in high quality protective eyewear for welding underneath the helmet is just as vital to guard against slag and grinding debris.

Flame-resistant (FR) clothing, leather gloves, steel-toe footwear, and a welding jacket are non-negotiable. These items will shield against molten spatter and radiant heat. Whether you are dialing in TIG welding polarity for precision work, or running higher deposition processes, exposed skin is never worth the risk.

Fume Control and Respiratory Protection

Arguably, the most insidious hazard is welding fume. As noted by OSHA FS-3647, welding fume can contain metals such as aluminum, cadmium, chromium, copper, iron, lead, manganese, nickel, and zinc. Of particular concern, hexavalent chromium (Cr(VI)) can form during certain welds, for which OSHA’s permissible exposure limit (PEL) is 5 µg/m3 as an 8-hour time-weighted average.

Exposure to manganese is also well documented. The CDC/NIOSH notes that some studies suggest welders exposed to low levels of manganese (<0.2 mg/m3) perform more poorly on tests of brain function and motor skills. NIOSH's recommended exposure limit (REL) for manganese is 1 mg/m3 (TWA) with a 3 mg/m3 STEL, while the OSHA PEL is 5 mg/m3 ceiling.

Ventilation is your first control. Work in areas with natural drafts and proper positioning when possible, but for most indoor work, general or local exhaust ventilation (LEV) is required. As OSHA FS-3647 states, work in areas without ventilation should use natural drafts plus proper positioning, and respiratory protection may be required if ventilation does not reduce exposures to safe levels. These controls are just as important for beginners learning how to use a wire welder, as they are for seasoned operators.

Confined Spaces, Special Considerations, and Final Checks

Confined spaces amplify nearly every hazard. Limited oxygen, poor ventilation, and the buildup of toxic gases can turn routine welds deadly. Before entering, a qualified person must assess the space, test atmospheric conditions, and establish rescue procedures. These jobs require strict compliance with OSHA 1910.252, as well as air-supplied respiratory protection when necessary.

Special populations may also need added precautions. For example, those researching can you weld while pregnant should consult qualified medical and safety professionals, as exposures can carry unique risks. Regardless of the scenario, no weld is worth cutting corners.

Before striking your next arc, run a five-point check: inspect cables and grounding, verify ventilation, don your full PPE, clear combustibles, and test your atmosphere if in a confined space. These habits, built over time through consistent welding practice, will solidify safety into your procedure for life.

Common Mistakes and Defects in Arc Welding Procedures

Most arc welding failures don’t announce themselves with a bang. They hide inside the joint as porosity, slag, or lack of fusion, then surface years later under load or during inspection. Nearly every one traces back to a procedural shortcut or a technique error—a mismatch between what the procedure said and what the hand actually did. Here are the mistakes that show up most often, along with the defects they cause and how to steer clear of them.

Wrong Polarity and Incorrect Amperage

Polarity is a procedure decision, not a preference. Run flux-cored wire on the wrong lead and you get heavy spatter, poor penetration, and cold lap. The right setting depends on the electrode: DCEN vs DCEP polarity for flux core changes with the wire type. On TIG, mixing up leads is just as costly—DCEN concentrates heat in the work for deep penetration, while DCEP ballasts the tungsten. Our guide to TIG polarity: DCEN, DCEP, and AC breaks down when each applies. Amperage is equally unforgiving: too low gives lack of fusion and a ropey bead; too high invites undercut, burn-through, and spatter. Start inside the maker’s range, then tune in small steps until the arc sounds steady and the toes wet out cleanly.

Arc Length and Travel Speed

Too long an arc spreads heat, loses shielding, and drops straight into porosity and undercut. Too short and the electrode stubs, the arc wanders, and the bead piles up cold. Travel speed is the other half of the equation: rush it and you get a thin, humped bead with lack of fusion at the toes; crawl and you overheat the puddle, causing burn-through and overlap. That rolled-over toe is a textbook overlap defect—see how to spot and repair it in our guide to the overlap welding defect.

Poor Fit-Up and Contamination

Gaps too wide force you to bridge air, which invites burn-through and lack of fusion. Close, clean fit-up is half the battle. Contamination is the other half. OSHA FS-3647 notes that welding surfaces should be cleaned of coatings such as paint, oil, and solvent residue—those burn into toxic fumes and feed porosity. Damp or contaminated electrodes cause the same trouble, which is why low-hydrogen rods like E7018 must be stored in a holding oven and drawn from sealed containers. Moisture drives both porosity and hydrogen cracking.

Insufficient Preheat

Thick sections and alloys like high-carbon or hardened steel pull heat away from the weld fast. Without preheat, the weld cools too quickly and hydrogen or cold cracking sets in. Preheat per the WPS slows that cooling and lets hydrogen escape—skip it and you may not see the crack until the part is in service. A temperature stick or infrared gun is cheap insurance here. Related behavior is covered in can you weld hardened steel.

Weaving Too Wide and Lazy Restarts

A weave wider than roughly three times the electrode diameter loses penetration and traps slag, producing inclusions. Stick to stringers or a tight weave when the WPS allows. Equally damaging are stops and starts without a tie-in: each restart can leave a cold lap and a crater crack. Never strike an arc on the finished surface, either. Backstep the start, feather the crater, and tie into the previous bead.

Changing an Essential Variable

Even a perfectly executed technique fails qualification if the procedure drifts. Under ASME Section IX, a change in GMAW transfer mode—say, switching to short-circuiting—is an essential variable that requires requalification (see the QW-255 discussion). Mixing a new mode, gas, or wire into a qualified procedure without a fresh WPS/PQR voids the paperwork behind the weld.

The pattern behind almost all of these is the same: the procedure said one thing and the hand did another. Learning to read a bead before an inspector does—as in good and bad MIG welds—and building deliberate welding practice keeps technique inside the qualified range. On wire processes, worn contact tips and liner drag quietly destabilize the arc and travel speed too, dragging a good procedure out of spec; contact tip maintenance is not optional.

Practical Tips to Improve Technique and Procedure Consistency

You can memorize every table in a WPS binder and still lay down a weld that fails inspection, because a procedure only works when your hands and your habits repeat it the same way every time. The gap between a qualified document and a qualified weld is consistency — and consistency is built through a handful of disciplined practices.

Build a WPS Library and Keep a Weld Log

Start with documentation. Every job you do regularly deserves an approved WPS and a matching PQR kept together in a physical or digital binder. The AISC Solutions Center is blunt about why: following a documented WPS and PQR helps ensure repeated weld properties, and any change in an essential variable requires requalification. Treat that binder as a living asset, not a shelf ornament.

Pair it with a weld log. Record date, WPS number, material, filler, machine settings, position, and any anomalies. A log turns troubleshooting into detective work instead of guesswork — when a defect shows up, you can trace exactly which variable drifted. This single habit separates professional shops from ones that keep rediscovering the same problem.

Tune by Sound and Puddle, Not Just the Dial

The numbers on the machine are a starting point. Experienced welders listen for a steady, frying-bacon crackle and watch the puddle to confirm it. If the arc sounds harsh and sputters, the settings are off; a smooth hum with a fluid, well-defined puddle usually means you’re dialed in. Learning to read the puddle — size, wetting at the toes, and how it freezes — is what actually controls quality. If you’re still building that eye, our guide on good and bad MIG welds shows what a healthy bead should look like.

Manage Arc Length, Travel Speed, and Rhythm

Arc length governs voltage and heat input; travel speed governs penetration and bead shape. Keep arc length short and steady for stick and short-arc processes, then move at a consistent pace so the puddle solidifies uniformly. Rhythm matters more than raw speed — a metronome-like travel produces uniform ripples and predictable penetration, while stop-start motion invites cold lap and overlap defects. Practicing with a deliberate cadence, counting in your head, rewires muscle memory fast.

Practice Deliberately in All Positions

Flat-position welding flatters everyone. Real capability comes from reps across flat, horizontal, vertical, and overhead work, which is standard in welding training curricula because each position changes gravity, heat flow, and your body mechanics. Don’t just weld more — weld with intent. Our complete guide to building real welding skills breaks deliberate practice into drills that target weak positions instead of repeating comfortable ones.

Respect Consumables and Equipment

Electrodes absorb moisture, and damp E7018 or flux-cored wire produces porosity and hydrogen cracking. Store rods in a heated cabinet or oven and re-dry them per the manufacturer’s instructions. On wire processes, wear and contamination at the tip wreck arc stability — our contact tip maintenance guide covers cleaning, liner checks, and replacement intervals. Meanwhile, inspect clamps, ground leads, and quick connectors regularly; a poor ground mimics operator error and sends you chasing settings that were never the problem.

Test Before You Trust, and Requalify When Things Change

Before any critical job, run a test coupon. It costs ten minutes and confirms your settings, technique, and fit-up on the actual material. It also gives you a chance to dial in parameters like 3/16 E7018 amperage on scrap rather than on the part.

Finally, remember that a procedure is conditional. Switch filler metal, thickness, position, or shielding gas, and you may have crossed an essential variable. Requalify rather than improvise — that discipline is what keeps every weld you make defensible, repeatable, and safe.

Putting It All Together: A Procedure Is a Promise

Strike an arc and you’re doing more than melting metal. You’re making a promise — to the inspector who signs off, the driver crossing that bridge, and the version of yourself who has to trust this joint ten years from now. An electric arc welding procedure is how you keep it. It turns a one-off spark into something repeatable, documented, and defensible.

Six Threads, One Rope

Look back through this guide and you’ll see six threads woven into a single rope. The physics explains why the arc behaves the way it does. The process choice — stick, MIG, TIG, or flux-cored — decides what you can realistically achieve. The variables (current, polarity, amperage, voltage, travel speed) are the dials that match that process to the metal. The WPS and PQR turn those settings into a certified document. Step-by-step execution is where the document finally meets the steel. And safety plus defect avoidance keep the whole thing honest.

Pull any one thread loose and the rope weakens. Beautiful technique with no documentation can’t be repeated. A perfect WPS with sloppy travel speed still produces a bad weld.

A Documented WPS Is Your Evidence Trail

That’s why documentation matters as much as technique. A documented WPS paired with its PQR provides the evidence trail proving a joint was made to qualified parameters — the same logic behind AWS Form N-1, which records the procedure qualification backing a production weld. Regulation agrees with common sense: under OSHA 29 CFR 1910.254, arc welding equipment must be chosen for its application, installed safely, and operated only by instructed, qualified workers. The law treats the procedure as part of the safety system, not an afterthought.

Safety runs through every step, too. Fume control, ventilation, and personal protection aren’t boxes to tick — NIOSH recommends controlling total welding fumes to the lowest feasible concentration while meeting the exposure limit for each constituent (NIOSH HHE Report 2023-0084-3425). A sensible shop layout and the right protective eyewear are part of the promise you make to whoever is under the helmet.

Write Down What You Do

Here’s the most practical takeaway of all: write down what you do. Keep a log of settings, joint prep, rod or wire choice, travel speed, and results. When a weld passes and looks right, you can reproduce those exact conditions. When one fails, you have data to find out why. That habit separates a welder who gets lucky from one who gets consistent, and it’s the bedrock of genuine welding practice. Even automation follows the very same rule — see how robotic submerged arc welding scales a qualified procedure across thousands of identical joints.

Most defects we covered — porosity, undercut, lack of fusion, overlap — trace back to a variable that drifted or a step that got skipped. Learning to read good and bad welds on sight, then tracing the flaw to its procedural cause, is a skill that compounds across a career.

An electric arc welding procedure is, in the end, a promise of quality: predictable, repeatable, and provable. It compresses physics, process, variables, documentation, execution, and safety into one disciplined habit. Whether you’re running a single bead in a home shop or qualifying a bridge girder, those principles don’t change. Master them and you stop guessing. You start delivering welds that earn trust — the kind that outlast the people who made them.

Keep learning, keep practicing, and keep writing it down. Explore more on technique, safety, and equipment at weldgallery.com.

Frequently Asked Questions

What is the difference between a welding procedure and a WPS?

In everyday talk, a ‘welding procedure’ is simply the way you set up and run a weld. Formally, a Welding Procedure Specification (WPS) is a written, controlled document that lists the essential variables, filler metals, and technique for a specific joint. A qualified WPS is backed by a Procedure Qualification Record (PQR) that proves test welds met the required properties.

Which electric arc welding process is best for beginners?

Shielded metal arc welding (SMAW, or stick) is often the best starting point because the equipment is simple, it is forgiving outdoors, and it teaches control of arc length and travel speed. GMAW (MIG) is easier to lay a clean bead with but requires shielding gas and more setup knowledge. Pick based on your material, thickness, and location.

Does polarity really change the weld?

Yes. Polarity controls how heat is distributed between the electrode and the work, which changes penetration and deposition. For example, E6010 runs on DCEP, while some electrodes like E7024 can run on AC, DCEP, or DCEN. Using the wrong polarity can cause poor arc stability, excessive spatter, and lack of fusion.

How often does a WPS need to be requalified?

It depends on what changes. Under ASME Section IX and AWS D1.1, changes to essential variables such as the welding process, position, base metal group, or in some cases transfer mode require requalification by testing. Nonessential variables can often be changed by revising the WPS without new tests.

Is arc welding fume dangerous?

Yes. Welding fume contains metals such as manganese, chromium, nickel, and lead, and can include toxic hexavalent chromium. OSHA sets a permissible exposure limit of 5 µg/m3 for Cr(VI), and NIOSH recommends controlling total welding fume to the lowest feasible concentration. Use ventilation, position yourself out of the plume, and wear appropriate respiratory protection.

What is the most common cause of a bad arc weld?

Poor travel speed and arc length control top the list, followed by wrong amperage or polarity and contaminated base metal. Inconsistent travel speed causes undercut, overlap, or lack of fusion, while a long arc reduces penetration and increases spatter. Clean the metal and follow the WPS settings before blaming technique.

Can I write my own WPS?

You can draft one, but for code work it must be qualified or prequalified. Some joints and processes can use prequalified WPSs under AWS D1.1 without testing, provided you stay within the code limits. For critical or code-stamped work, a qualified WPS supported by a PQR is required, and qualification testing can be costly.

What should I check before striking an arc on a job?

Confirm the WPS, verify base metal and filler match it, clean and fit up the joint, set the correct polarity and amperage, check all machine and ground connections, and ensure ventilation and PPE are in place. A two-minute pre-check prevents most rework and rejects.

Authoritative Sources & Further Reading

• https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.254
• https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.252
• https://www.osha.gov/sites/default/files/publications/OSHA_FS-3647_WELDING.pdf
• https://www.cdc.gov/niosh/topics/welding
• https://www.cdc.gov/niosh/hhe/reports/pdfs/2023-0084-3425.pdf
• https://pubs.aws.org/Download_PDFS/a3.0-2001PV.pdf
• https://pubs.aws.org/content/free_downloads/AWS_N-1_WPS-PQR_Form.pdf
• https://www.asme.org/learning-development/find-course/ippd645-asme-bpv-code-section-ix-welding-brazing-fusing-qualifications-(in-person)
• https://www.aisc.org/aisc/solutions-center/engineering-faqs/86-welding-procedure-specification-wps
• https://doa.wi.gov/DFDM_Documents/MasterSpecs/Utilities/WeldFillerMetalSelection.pdf
• https://www.mass.gov/info-details/safe-welding-practices
• https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-Q/section-1910.254