For piping inspectors sitting API 570
API 570 course and practice exams
Practice corrosion rate, remaining life and piping inspection intervals.
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Answers come from this course's own plans and contents.
- 8 modules of lessons with worked examples
- 2 timed exams at real length: 170 questions, 390 minutes
- Timed ASME B31.3 lookups, 8 a set, with your median time
Lifetime access, including your retake
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Everything in API 570 course
Learn every Body of Knowledge section, work the calculations step by step, then prove it on timed exams.
- 8 lesson modules covering every task in API's API 570 outline
- Timed lookups in ASME B31.3 by paragraph and table number, 8 a set, with your median time on each set
- 6 worked calculations you can repeat with your own numbers
- A week-by-week study plan built from your free check and exam date
- 660 original questions, each explained with the reference it uses
- 2 full-length timed exams (170 questions, 390 minutes), weighted like the real exam
- After each timed exam, see how each domain moved since your last one
- Domain scores after every drill show what to study next
- Exam-day checklist: what to bring, allowed references and the calculator rules
- Today's 10: ten a day, and every miss comes back until you get it right
- Listen to Today's 10 on the go
- Readiness by domain, from your own practice results
- Every question, reshuffled into new sets aimed at your weakest domain
- Flashcards for every domain, with spaced review
- Code-book tab map
- Patch, your AI study assistant
Best if: You want a structured path through the whole Body of Knowledge.
What's covered
- 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
In API 570 course
- 660original questions
- 2timed exams at real length
- 8modules of lessons
- 8timed code lookups a set
See how Patch answers
Working out a corrosion rate
A wall reads 0.500 inch, then 0.480 inch four years later. What is the corrosion rate?
You: How do I get a corrosion rate from two thickness readings?
Patch: Subtract the later reading from the earlier one to get the metal lost, then divide by the years between the readings. Losing 0.020 inch over 4 years is 0.005 inch a year.
Key point: Corrosion rate is metal lost divided by the time between readings.
An original example, not an exam question. AI can be wrong, so check it against your course.
What members get
With the course.
Today's 10 10 questions a day from your misses and your weakest domain, so what you got wrong comes back. Plus a missed set of up to 50.
A plan to your exam date Set your date and get a week-by-week plan you can add to your calendar in one tap.
Readiness by domain Your practice results against a 75% study target, and how they moved this week. A study target, not a pass prediction.
- Timed exams on the real clock. A live pace line, and Save and exit when you need a break. You pick up with the time you had left.
- An exam-day guide. What to bring, the references you may use and the calculator rules.
- 660 original questions, every one explained. Review every miss after each timed exam. Practice sets show you the ones you haven't seen first.
- Wrong answer key? We fix it within 2 business days and log it publicly.
- One payment. No subscription, nothing renews.
- Didn't pass? Your access never ends. Your retake prep is already paid for.
Look inside the course
The real course screens you get after checkout, shown here with sample questions and answers.
Timed exam with flagsA countdown clock, a flag button on every question and a navigator that shows what you answered and flagged. Review every missAfter the exam, open any question you missed to see your choice, the correct answer, why, and the code section to read. Readiness by domainYour overall readiness against a study target, and each domain rated from your own answers so you know where to work.
Practice drawn to the API 570 outline: every domain within 2 points of its exam weight
- Calculations for thickness measurements, inspection intervals and piping integrity25%
- Welding procedure and qualification evaluation15%
- Nondestructive examination15%
- Practical knowledge - general20%
- Practical knowledge - specific25%
See the numbers
Each domain's weight on the API 570 outline, as our timed exams draw it, beside its share of the 660-question bank.
| Domain | Outline | Bank |
|---|---|---|
| Calculations for thickness measurements, inspection intervals and piping integrity | 25% | 25% |
| Welding procedure and qualification evaluation | 15% | 15% |
| Nondestructive examination | 15% | 14% |
| Practical knowledge - general | 20% | 22% |
| Practical knowledge - specific | 25% | 24% |
Next API 570 window: Jan 2027. API's application deadline is 26 Nov 2026.
Instant access. Everything in the plan you choose opens as soon as checkout completes.
See the teaching before you buyRead a complete lesson from the course, “Corrosion rates, remaining life and inspection intervals”, and try a short practice set with full explanations. Free, no signup.
Read the free lessonWhat the course covers
8 modules covering every task in the API 570 outline.
- API 570: scope, the inspector, piping classes and records (4 sections)
- Corrosion rates, remaining life and inspection intervals (4 sections)
- B31.3 required thickness, joint factors and MAWP (4 sections)
- Pressure testing, impact testing, preheat, repairs and rerating (5 sections)
- Flanges, gaskets and material verification (4 sections)
- Welding procedures, qualifications and welding processes (4 sections)
- Nondestructive examination (6 sections)
- Damage mechanisms, piping components and relief devices (5 sections)
Questions
When do I get access?
Straight away. Checkout takes you to your course, and the receipt email has the same link.
How do I get back into my course?
Use the link in your receipt email. If you can't find it, enter your email on the course page and we resend it to the address on your order.
Is 660 questions enough?
Each one comes with a worked explanation and its reference. You also get 24 end-of-module checks, timed code-lookup drills in sets of 8 and 6 worked calculations. Today's 10 and your missed set bring your misses back on later days, so you work the bank instead of reading it once.
Can I get a refund?
Eligibility depends on your plan, when you request a refund and your paid use. See the refund terms for the conditions and exceptions.
What if I need a retest?
Keep studying in the same course. Your access has no end date, so your retake prep is already paid for, and your practice history, missed questions and readiness by domain are still there.
How long do I keep access?
Lifetime access: your access has no end date. Updates are included, so if American Petroleum Institute moves this exam to a newer code edition while you have access, your course moves with it.
More questions (6)
Are the questions copied from the exam?
No. Every question is original and written to American Petroleum Institute's published content outline. Exam content is confidential and we never use it. We are not affiliated with or endorsed by American Petroleum Institute.
How are the questions written?
In our own words, to API's current published outline. See how many questions cover each domain.
Do I need my own copy of API 570?
No. In the open-book part of the exam, API shows only the sections of the publications on its Publications Effectivity Sheet on your screen as PDFs, and papers, notes and books are not allowed in the testing center. A copy of those publications is still useful for practice, so you can find your way around them before the clock starts. We cite sections by number and never reproduce the text of any API or ASME document. Check the sheet for your exam date.
Can my employer pay?
Yes. Pay at checkout and we email a receipt you can expense, or download a reimbursement request to send your manager.
Is Patch AI?
Yes. Patch is an AI study assistant, not a person or an instructor. Check important details against your lessons and references.
Can you promise I will pass?
No, and nobody honest can. We promise everything listed in your plan, and a fix within 2 business days for any wrong answer key.
Employer paying?
Many employers fund API 570 prep. Generate a reimbursement request PDF to send to your manager. Buying for a crew? Request a quote