For piping inspectors taking the API 570 exam
API 570: work the piping calculations
Patch AI Answer, then ask me why, in the free 10-question check. Start the check
Practice corrosion rate, remaining life and inspection interval problems by hand. Take the free 10-question check and see your study priorities by Body of Knowledge section.
YouWhy is that one wrong?
PatchI'll show you why the right answer works, why each other option falls short, and where to look it up.
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- Written to the API 570 Body of Knowledge
- API 570 Jan 2027 window: apply to API by 26 Nov 2026
- 10 questions, untimed
- Answers explained as you go
- Scored by domain
Full API 570 course: $199, available now. See what's inside →
Exam at a glance
- Format
- 170 questions in 390 minutesBook: Closed-book part, then open-book part. The open-book part gives PDFs of the publications on the Publications Effectivity Sheet on screen, and only the listed sections can be used. Calculator, scratch paper and pencil provided; papers, notes and books are not allowed in the test center
- Delivery
- In person at designated test centers only
- Fee
- Initial: 2026 Fees tab $875 member / $1,125 non-member; 2027 Fees tab $890 / $1,140. Recertification: 2026 $745 / $855; 2027 $760 / $870. Late application $200. Reschedule (new window) $350
What it covers
The free 10-question check follows these domains, subject to the available practice questions.
Original practice material. Not affiliated with API.
Want exam pace? Take the 25-question practice test (about 57 minutes)
How it works
Answer
10 questions, untimed. Check each answer to see why it's right, with a hint where one helps.
See your score
Your score, broken down by outline domain, with your weakest one named.
Study smarter
Add your email and exam date for a study plan. Ready for exam pace? The 25-question practice test pauses and saves your place.
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See what's on the API 570 exam, take the free 10-question check, or find the plan that fits you.
The API 570 course
Available now · instant accessLearn every Body of Knowledge section, work the calculations step by step, then prove it on timed exams.
- 8modules of lessonsEvery task on the outline
- 2full-length timed exams170 questions in 390 minutes each
- 419practice questionsEach one explained
- 6worked calculationsStep by step
- 1week-by-week study planSet to your exam date
Patch, your AI study buddy: a week-by-week plan from your exam date and weak areas, step-by-step walk-throughs and a weak-spot quiz. Up to 40 messages a day.
See all 8 modules
- API 570: scope, the inspector, piping classes and records
- Corrosion rates, remaining life and inspection intervals
- B31.3 required thickness, joint factors and MAWP
- Pressure testing, impact testing, preheat, repairs and rerating
- Flanges, gaskets and material verification
- Welding procedures, qualifications and welding processes
- Nondestructive examination
- Damage mechanisms, piping components and relief devices
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Every answer comes with a full explanation.
The Long Seam app
Study for the API 510, API 570 and API 510 recert exams anywhere you are
The Long Seam app for iPhone and Android is built around your study buddy, with quick practice questions and your study plan. Long Seam already works in your phone's browser today.
- Today's questions, aimed at your weakest domain
- Your week's plan, counting down to exam day
- The same original questions and explanations as the site
- Every exam on the site: API 510, API 570 and API 510 recert
Patch AI, your Long Seam study buddy, is at the center of the app.
- Tutor walkthroughs: Step-by-step help on any question you answered, at your pace.
- My study course: A day-by-day course built from your weakest domains.
- Weak-spot quiz: Quiz yourself on what you missed, with spaced review so it sticks.
Early designs of the Long Seam app. Everything here already works in your phone's browser.
API 570 practice FAQ
Is this the real API 570 exam?
No. We never use real or recalled exam items. This practice material follows the 2026 Body of Knowledge topics and does not predict your exam score or certification outcome.
Do you reproduce the codes?
No. We cite document and section numbers without reproducing code-book text. Use your own licensed references when studying.
Which editions apply?
This material follows the 2026 Publications Effectivity Sheet. Check API's current Body of Knowledge and effectivity sheet for your exam window before studying.
- 01Free API 570 check10 questions, untimed, about 23 minutes. Answers explained as you go.Start free
- 02Free sample lessonCorrosion rates, remaining life and inspection intervals: a full lesson from the course.Read the sample
- 03API 570 course$199. Lessons, timed practice exams and a plan around your exam date.See the plans
Want the full picture first?Format, domains, references and published sources in one page.
Read the API 570 exam guideMore free practice: free sample lesson and question of the day.
Sitting a different exam? Try the API 510 or API 510 recert free 10-question check.