CWI Part C on API 1104: the pipeline exam
API 1104 is the standard for welding pipelines and related facilities. AWS offers its code exam two ways: as the Part C exam on the way to a first CWI, or as a stand-alone endorsement for a current CWI or SCWI. The English form has 60 scored multiple-choice questions plus 5 unscored pretest questions, with 135 minutes to answer. It is open book with the 22nd edition, and you need 72% to pass.
- Questions
- 60
- Time
- 135 minutes
- Exam fee (paid to AWS, not us)
- $445 member / $540 non-member
- Where
- Prometric CBT; 150 minutes seat time (135 to answer) for the English form
The five content areas
AWS publishes a minimum share of the exam for each area:
- Qualification (at least 25%): procedure and welder qualification for pipeline work.
- Fabrication (at least 25%): production welding, preparation and repair.
- Inspection (at least 25%): inspection methods and the acceptance standards.
- Reports and records (at least 5%): the records the standard asks for.
- Materials and design (at least 5%): pipe and filler materials and the design provisions.
These are the same five areas as the D1.1 Part C exam. Our D1.1 Part C guide covers the structural steel version if your work is not on pipelines.
Try one question
Question 1 of the free 10-question check on API 1104 Part C. No signup. Then ask Tack, the AI study assistant, why the answer is right and the others are wrong.
Inspection
Which method can find only flaws that are open to the surface?
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Open book: learn the layout
The 22nd edition is on screen as a PDF, and AWS recommends navigating it by bookmarks because some PDF features may be switched off. You may also bring a bound printed copy. AWS does not say whether word search works on the exam PDF, so practice as if it does not: know which section holds qualification, production welding, inspection and acceptance, and get there fast.
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The exam in brief
- Questions and time: 60 scored questions plus 5 unscored pretest questions on the English form, 135 minutes to answer and 150 in the seat, at a Prometric test center. The AWS endorsement page still says two hours; the newer description says 135 minutes.
- Pass mark: 72%.
- Cost: the stand-alone endorsement is $445 for AWS members and $540 for non-members (AWS price list, effective 1 January 2026). A Part C retest is $445.
- Retests: a candidate who fails Part C retests with the same code within the three-year retest period.
Start with the free 10-question check
See which content area costs you points before you book. Take the free 10-question API 1104 check. It needs no signup, explains every answer and points to the standard by section, never by quoting it.
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Sources
Show the list
- API 1104 Endorsement Description, Rev. 11.05.2026, American Welding Society, read 7 November 2026.
- API 1104 endorsement, American Welding Society.
- CWI Examination User Guide, American Welding Society.
- Program price list, American Welding Society.
Exam facts
| Questions | 60 |
| Time | 135 minutes |
| Book | open book; API 1104 22nd edition PDF on screen at Prometric (English only; AWS recommends bookmark navigation and says some PDF features may be disabled; whether it is searchable is unconfirmed); a bound printed copy is also permitted |
| Passing | 72% |
| Where you test | Prometric CBT; 150 minutes seat time (135 to answer) for the English form |
| Code edition | API 1104 Welding of Pipelines and Related Facilities, 22nd edition (2021) |
| Exam fee (paid to AWS, not us) | $445 member / $540 non-member |
| Retakes | Re-examination follows AWS QC1:2016-AMD1; an applicant who fails Part C must retest with the same code within the 3-year retest period |
Fee details
Stand-alone endorsement: $445 member / $540 non-member. Part A or C retest: $445. The initial CAWI/CWI exam is $1,255 member / $1,520 non-member; whether that fee covers API 1104 as the Part C code is not stated. Eligibility: any current CWI or SCWI may take it as a stand-alone endorsement, and any CWI candidate as the initial Part C exam.
What the exam covers
| Qualification | 25% |
| Fabrication | 25% |
| Inspection | 25% |
| Reports and Records | 5% |
| Materials and Design | 5% |
Sources
Show the 6 sources
- aws-p-001-delivery.sitecorecontenthub.cloud/api/public/content/API-1104-endorsement (checked 2026-11-07)
- aws.org/Certification-and-Education/Program-Price-List/ (checked 2026-11-07)
- aws-p-001-delivery.sitecorecontenthub.cloud/api/public/content/CWI-Examination-User-Guide (checked 2026-11-07)
- aws.org/certification-and-education/CWI-and-SCWI-Endorsements/api-1104-endorsement/
- aws-p-001-delivery.sitecorecontenthub.cloud/api/public/content/Open-book-Exam-Reference-Gu
- aws.org/certification-and-education/professional-certification/certified-welding-inspector
Facts come from American Welding Society's own documents (sources above); the latest source retrieval was . If something has changed, tell us and we will correct it within 2 business days.
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