Welding VI: Introduction to Pipe Welding and Lab

Course Description

Welding VI: Introduction to Pipe Welding and Lab advances welding capability using stick (SMAW) and MIG (GMAW) processes, focusing on joining pipe in multiple orientations and working toward weld certification.

Within the SCNS taxonomy, PMT is the Precision Metals prefix, and the 0-level number identifies this as postsecondary adult vocational (PSAV) coursework. Daytona State publishes it at 90 clock hours with zero college credit, corequisite PMT0134C, offered fall, spring, and summer, with a $433.02 lab fee — the highest in this repository's welding sequence, reflecting consumables.

Pipe welding is where welding pay separates. Plate welding is the foundation; pipe is the qualification employers pay a premium for, because the joint is continuous around a curved surface, the welder must work in every position including overhead and out of sight, and the applications — process piping, pressure systems, structural — are the ones where failure is expensive and dangerous.

Learning Outcomes

Required Outcomes

• Apply welding safety practices, including eye, skin, and respiratory protection.
• Describe pipe welding terminology, joint geometry, and the standard test positions.
• Prepare pipe joints, including bevelling, fit-up, root opening, and land dimension.
• Align and tack pipe accurately and maintain alignment through welding.
• Select electrodes and filler metals appropriate to the base metal and application.
• Set and adjust machine parameters for SMAW on pipe.
• Set and adjust machine parameters for GMAW on pipe.
• Execute a root pass with consistent penetration and internal profile.
• Execute hot, fill, and cap passes with correct bead placement and tie-in.
• Weld pipe in the 2G (horizontal) position to acceptable quality.
• Weld pipe in the 5G (horizontal fixed) position to acceptable quality.
• Weld pipe in the 6G (45-degree fixed) position to acceptable quality.
• Control heat input and interpass temperature.
• Identify weld discontinuities and describe their causes and prevention.
• Perform visual inspection to a stated acceptance criterion.
• Describe destructive and non-destructive testing methods used to qualify welds.
• Prepare and perform bend test coupons.
• Read and interpret a welding procedure specification.
• Describe welder qualification, its scope, and its limits.
• Describe applicable codes and standards for pipe welding.
• Maintain equipment and describe routine troubleshooting.

Optional Outcomes

• Perform GTAW (TIG) root passes on pipe.
• Weld stainless steel or alloy pipe.
• Describe purging techniques for root protection.
• Describe pipe fabrication layout and fitting.
• Prepare for a specific employer or code certification test.
• Describe orbital and automated pipe welding.

Major Topics

Required Topics

• Welding safety and personal protection
• Pipe welding terminology and test positions
• Joint preparation: bevel, land, root opening
• Alignment, tacking, and fit-up
• Electrode and filler metal selection
• SMAW parameters on pipe
• GMAW parameters on pipe
• Root pass technique and penetration
• Hot, fill, and cap passes
• 2G position welding
• 5G position welding
• 6G position welding
• Heat input and interpass temperature
• Weld discontinuities and their causes
• Visual inspection and acceptance criteria
• Destructive and non-destructive testing
• Bend test preparation and performance
• Welding procedure specifications
• Welder qualification and its scope
• Codes and standards
• Equipment maintenance and troubleshooting

Optional Topics

• GTAW root passes
• Stainless and alloy pipe
• Purging techniques
• Pipe layout and fitting
• Certification test preparation
• Orbital and automated welding

Resources & Tools

• Welding: Principles and Applications (Jeffus) or Modern Welding (Althouse) — the standard texts.
• Pipe Welding Procedures (Hoyt Rampton) — the classic reference on pipe specifically, and still widely used.
• American Welding Society (AWS) (aws.org) — the professional body; student membership is inexpensive, and AWS publishes the certification structure and the codes.
• AWS D1.1 Structural Welding Code — Steel and ASME Section IX — the qualification standards; check library access, since these are purchases.
• API 1104 for pipeline welding, where your programme covers it.
• Lincoln Electric and Miller Electric — free and excellent technical libraries, welding guides, and troubleshooting resources. The manufacturer material is genuinely good and costs nothing.
• OSHA — free: welding, cutting, and brazing standards (29 CFR 1910 Subpart Q), confined space, and hexavalent chromium requirements.
• NIOSH — free guidance on welding fume exposure and respiratory protection.
• Personal equipment: a good auto-darkening helmet, leathers, gloves, safety glasses, and boots. Buy a quality helmet — you will use it every day and eye fatigue is real.
• Practice coupons and shop time. Ask about open lab; pipe technique is built by repetition and nothing substitutes for arc time.

Career Pathways

• Pipe welder — the direct destination, and the specialization that pays a premium over plate welding.
• Pipefitter and welder — mechanical contractors, industrial construction, and process plants.
• Industrial and plant maintenance welder — power generation, manufacturing, water treatment, and food processing.
• Shipyard and marine welding — Florida has active shipyards and a large marine repair sector.
• Structural welder — construction and fabrication.
• Pipeline welding — travelling work, high pay, and its own certification under API 1104.
• Welding inspector — the AWS Certified Welding Inspector (CWI) is a well-paid path requiring experience plus examination, and it extends a welding career beyond the years you want to be under a hood.
• Welding instructor — technical colleges and apprenticeship programmes.
• Self-employment — mobile welding and repair, a genuine small-business path.
• SOC code 51-4121 Welders, Cutters, Solderers, and Brazers. Florida demand comes from construction, marine, aerospace on the Space Coast, and industrial maintenance; certified pipe welders are consistently scarcer than plate welders.

Special Information

⚠ Certification is what you are actually buying — and it is position- and process-specific

The career point that determines what this course is worth, and it is widely misunderstood by students.

Employers hire on certification, not on coursework. A welding certificate says you completed training; a welder qualification test record says you demonstrated a sound weld to a specified procedure, witnessed and documented. The second is what gets you hired and paid.

What every welder needs to understand about qualification:

• Qualification is specific to a process, a base metal group, a thickness or diameter range, a position, and often a filler metal. Being qualified in 2G does not qualify you in 6G.
• Position matters enormously, and it is the reason this course exists. 6G — the 45-degree fixed pipe position — is the benchmark, because it requires welding in every position around a single joint and it qualifies the welder for most other positions. A 6G ticket is the credential pipe employers ask about by name.
• Qualification belongs to the employer's procedure in most codes. Under ASME Section IX and AWS D1.1, a welder is qualified to a specific welding procedure specification (WPS), which is normally the employer's. A new employer commonly retests you, and that is normal rather than a slight.
• Qualification lapses. Codes generally require that the welder use the process within a defined period, and continuity records must be maintained. A welder who has not used a process for months may need requalification.
• Union apprenticeships and employer programmes are a parallel route with paid training — worth investigating alongside the college pathway.
• AWS certifications and employer tests are not identical; ask what your programme's test qualifies you for and to which code.

The practical advice: find out what the local employers test to — the codes and positions used in your market — and train toward that specifically. A 6G stick certification is a different job market from a structural plate certification.

⚠ Welding hazards are cumulative as well as immediate

The safety content, split by timescale, because the injuries that end welding careers are usually the slow ones.

Immediate hazards:

• Arc eye — ultraviolet keratitis from unprotected exposure; painful, and it appears hours later. Use the correct shade, and protect people around you with screens, since bystanders get burned by arcs they were not watching.
• Burns from spatter, hot metal, and the fact that everything looks the same hot or cold. Leathers, no rolled sleeves, no synthetic clothing underneath — synthetics melt onto skin.
• Fire and explosion. Sparks travel much further than expected, hot work permits exist for that reason, and never weld or cut on a container that held flammables without proper cleaning and certification — this is a recurring fatal accident.
• Electric shock — welding equipment is a shock hazard, particularly in wet conditions or when perspiring. Keep leads and holders in good condition and stay insulated from the work.
• Compressed gas cylinders — secure them upright, cap them when moving, and never use oxygen as compressed air.
• Confined spaces — pipe work frequently means tanks, vessels, and trenches. Permit-required confined space entry procedures are not paperwork: test the atmosphere, ventilate, attend from outside, and never enter to rescue without equipment. Shielding gas displaces oxygen.

Cumulative hazards, which are the career-enders:

• Welding fume. Fume composition depends on base metal, filler, and coating. Hexavalent chromium from stainless steel is a known carcinogen with a specific OSHA standard; manganese exposure has neurological effects; galvanized coatings produce zinc oxide fume and metal fume fever. Local exhaust ventilation, positioning yourself out of the plume, and respiratory protection where required are the controls — and "I've done it for years" is not one.
• Noise — grinding and plasma cutting are loud; hearing loss is permanent and cumulative.
• Musculoskeletal load — pipe welding involves sustained awkward postures, overhead work, and kneeling. Vary position where possible and take the ergonomics seriously early.
• Vision — eye strain accumulates; a good auto-darkening helmet with a wide clear view is a health purchase, not a luxury.

⚠ The root pass decides the weld

The technical heart of pipe welding, and where students spend most of their frustration.

Everything after the root is easier, and nothing after the root fixes it. The root pass establishes penetration and the internal profile — which, in pipe carrying fluid, is a surface that matters — and it is welded in a joint you frequently cannot see all of.

• Fit-up determines the root. Root opening, land, bevel angle, and alignment must be right before you strike an arc. Most root pass failures are fit-up failures, and time spent on fit-up is repaid several times over.
• Tacks must be sound and correctly placed, and they become part of the weld — grind and feather them.
• Watch the keyhole. Consistent penetration in an open root shows as a consistent keyhole; losing it means losing penetration, and chasing it produces burn-through.
• Suckback, excessive penetration, and lack of fusion are the characteristic root defects, each with a distinct cause — travel speed, amperage, gap, and electrode angle respectively in most cases.
• Position changes as you travel around the pipe. In 5G and 6G you move continuously from overhead through vertical to flat within one joint, and technique must change with it. This is what makes 6G the benchmark.
• Clean between passes. Slag inclusions are the classic multi-pass defect and are entirely preventable.
• Bend tests do not lie. The coupon opens up and shows exactly what happened at the root, which is why destructive testing is part of the course.

The honest expectation: pipe takes far more arc time than plate to become consistent. Students who are competent on plate frequently find 6G humbling, and the only remedy is repetition. Use every hour of open lab you can get.

⚠ This is PSAV clock-hour coursework — it does not transfer as college credit

The 0-level SCNS number identifies this as postsecondary adult vocational coursework, measured in clock hours with zero college credit. PSAV coursework does not transfer into a college-credit programme the way a 1000- or 2000-level course does. What exists instead is articulation, awarded where it exists for completing an entire programme or occupational completion point rather than for individual courses, and never automatically. Get a written evaluation from the receiving institution before assuming.

PMT0161C is 90 clock hours of combined classroom and shop instruction with a $433.02 lab fee reflecting pipe, electrodes, and gas consumption. Assessment is by welded test coupons evaluated against acceptance criteria, including visual inspection and bend testing, plus written assessment on procedures and codes. The coupons are the grade, and they are also the practice for the certification test that follows.

How Florida course levels affect transfer

The first digit of an SCNS number denotes the year of offering, not transferability. Courses at the 1000 and 2000 levels transfer transparently between Florida public institutions, and 3000 to 4000 is unproblematic since both are upper division. The boundary that actually matters is 2000 to 3000, where lower-division credit generally cannot satisfy an upper-division requirement.