AWS API 1104 Endorsement common mistakes
AWS API 1104 Endorsement · Understand the traps and how to avoid them.
Treating API 1104 as a welding-procedure exam and answering from general pipeline-construction habit rather than quoting what the standard actually requires for qualification, record-keeping, and acceptance.
Most candidates come from field welding or inspection backgrounds where company practice and client specifications fill gaps, so they answer from memory of how their spread did it instead of the clause-based requirement the item tests.
What to do instead
Before answering, locate the controlling clause mentally: is the question about procedure qualification, welder qualification, inspection method, or acceptance criteria? Answer only from that clause's stated requirement, and treat company practice as irrelevant unless the item explicitly says a specification governs.
Confusing welder qualification with procedure qualification, for example assuming a qualified WPS automatically qualifies every welder who follows it, or that a welder's passing test extends to any procedure.
The two qualification tracks share vocabulary (test coupon, bend test, ranges qualified) and candidates blur them under time pressure, especially when an item describes a coupon without saying whose qualification it establishes.
What to do instead
Anchor each item by asking who is being qualified: a procedure (documented, supports a range of essential variables) or a person (demonstrates skill on a specific coupon). A qualified WPS is a prerequisite for testing welders, never a substitute for their test.
Misapplying essential-variable ranges, such as assuming a change in pipe diameter, wall thickness, position, or process within a procedure needs no requalification, or conversely assuming every minor change does.
Candidates memorize a short list of variables but do not internalize which changes invalidate a procedure versus which are supported by the existing qualification, and the standard's variable tables are easy to skim.
What to do instead
Study the essential-variable clause as a table: for each variable, note whether a change requires a new procedure qualification, only a revised WPS, or nothing. Practice classifying changes (diameter up versus down, thickness increase versus decrease, position progression) until the direction of the rule is automatic.
Getting acceptance-criteria numbers wrong, for example applying the wrong size limit to reinforcement, undercut, hi-lo, or arc burns, or forgetting that some discontinuities are rejectable regardless of size.
The standard contains several numeric limits that differ by type and location, and candidates rely on remembered approximations rather than the actual table values, then pick the closest-looking option.
What to do instead
Build a one-page acceptance summary from the standard: each discontinuity type, its limit, and whether it is a size-based or categorical rejection. Review it until you can state the limit and the clause it comes from without looking, and re-derive rather than guess when an option feels familiar.
Mixing up radiographic and ultrasonic inspection requirements, such as applying radiographic density or image-quality-indicator rules to an ultrasonic examination item, or assuming the two methods share acceptance thresholds.
Both methods appear in the same inspection section and candidates skim headings, so method-specific technique requirements and recording thresholds get cross-applied.
What to do instead
Separate the two methods into distinct mental files: technique and equipment requirements, qualification of personnel, recordable versus rejectable indications, and documentation. When an item names a method, answer only from that method's subclause.
Answering repair and cutout questions from field intuition, for example assuming any rejected weld is simply repaired, or that a repair weld is accepted under the same criteria as the original without additional examination.
Field practice varies widely by operator specification, and candidates substitute what their employer allowed for what the standard requires regarding repair procedures, number of repairs, and reexamination.
What to do instead
Learn the standard's repair sequence explicitly: what must be done before repair, what procedure governs it, how many repair cycles are permitted, and what examination follows. Where the standard defers to the operating company, note that deferral rather than inventing a default rule.
Ignoring the role of the operating company and specification where the standard defers, and instead choosing the answer that sounds most technically rigorous.
API 1104 leaves several decisions (extent of nondestructive testing, additional requirements, acceptance of specific conditions) to the operating company, and candidates trained to pick the strictest option select an over-specified answer.
What to do instead
Flag every clause where the standard says the requirement applies as agreed or specified by the operating company. For those items, the correct answer is usually the one that reflects the deferral, not the one that imposes an absolute rule.
Misreading what a test coupon demonstrates, for example assuming a nick-break or bend specimen evaluates toughness or tensile strength rather than the specific property and region the standard assigns it.
Destructive test names are familiar from other codes with different purposes, so candidates map the specimen to the wrong property or to the wrong acceptance feature.
What to do instead
For each specimen type, write down what it is intended to reveal, where it is taken from the weld, and its acceptance description. Test yourself by describing the specimen's purpose in one sentence before reading the options.
Overlooking documentation and traceability requirements, such as what must appear on the qualification record, who certifies it, retention expectations, or which records must accompany the weld.
Candidates concentrate on welding physics and acceptance limits because those feel like the technical core, treating paperwork items as low-value and answering them casually.
What to do instead
Treat records as a testable topic: list the required contents of a procedure qualification record and a welder qualification record, who signs, and what the standard requires to be maintained. Review these lists with the same rigor as acceptance criteria.
Rushing items that hinge on a single qualifying word, such as shall versus should, all versus any, or maximum versus minimum, and choosing an option that reverses the direction of the limit.
Items are short and the plausible options differ by one word, so under time pressure candidates pattern-match the topic instead of reading the quantifier and direction carefully.
What to do instead
Adopt a two-pass routine: on the first pass identify the topic and the clause, on the second read the stem and each option word by word, underlining quantifiers and direction terms. Eliminate options that reverse a limit before comparing the survivors.