API 570 Audit Preparation for Inspection Companies
A API 570 audit runs in 6 stages, beginning with piping circuits defined and each circuit assigned a class by consequence of.. American Petroleum Institute. API's Individual Certification Programs office certifies the Authorized Piping Inspector; the piping inspection programme is owned and enforced by the owner-user, and audited by the owner-user or by OSHA under process safety management tests the system by sampling finished work backwards to the.
API 570 is built around circuits, not vessels, and that changes what a service provider must deliver. Piping is classified by consequence of failure, condition monitoring locations are the unit of record, and the code singles out injection points, dead legs, small-bore piping, corrosion under insulation and soil-to-air interfaces as the places programmes fail. The code is explicitly written for outsourcing: it states it is intended for use by organizations that maintain or have access to an authorized inspection agency, a repair organization, and technically qualified piping engineers, inspectors and examiners, all as defined in its definitions section. The Authorized Piping Inspector must hold API 570 certification. The examiner performing the NDE need not, and normally does not. What separates firms that clear an audit from firms that collect findings is not the quality of the documentation but whether it describes what actually happens.
Source: API 570 Body of Knowledge for the February, June and October 2026 exams, api.org — verified for the reference publication list (API 570; API RP 571, 574, 576, 577 and 578; ASME Section V, Section IX, B16.5, B31.3 and PCC-2), for the ASME Section V Articles in scope (Article 1 general requirements including owner/user and subcontractor responsibilities, calibration, the definitions of inspection and examination and record keeping; Article 2 radiographic; Article 6 liquid penetrant with mandatory appendices II and III; Article 7 magnetic particle, yoke and prod only; Article 9 visual; Article 10 leak testing with mandatory appendix I; Article 23 SE-797 ultrasonic thickness), and for the ASME PCC-2 articles examined. API 570 4th edition publisher's preview, api.org — verified for the scope statement, the exclusion of instrumentation, exchanger tubes and control valves, the treatment of abandoned versus mothballed piping, and the statement that the code is intended for organizations that maintain or have access to an authorized inspection agency, a repair organization, and technically qualified piping engineers, inspectors and examiners as defined in Section 3. API Standard 570 announcement page confirms the 5th edition; the February 2024 date comes from reseller listings. API ICP Schedules & Fees for fees and 2026 exam windows. The class-based maximum thickness-measurement and external-visual intervals were not verified against the 5th edition text and are therefore described here without figures.
| Stage | What happens | What it tests |
|---|---|---|
| Stage 1 | Piping circuits defined and each circuit assigned a class by consequence of failure; the class drives the maximum interval and. | Where the paperwork is tested against itself |
| Stage 2 | Contract scope written against the circuit list; the contractor's written practice, procedures and examiner records accepted by the owner-user before. | Where the paperwork is tested against practice |
| Stage 3 | Isometrics and CML/TML identification verified on site — the most common single source of data that cannot afterwards be trended | Where the paperwork is tested against practice |
| Stage 4 | Examination performed to procedure, with readings recorded against the permanent CML identifier rather than the line number | Where the paperwork is tested against practice |
| Stage 5 | Authorized Piping Inspector evaluates the data, computes short-term and long-term corrosion rates and sets the next interval | Where the paperwork is tested against practice |
| Stage 6 | Findings on injection points, dead legs, corrosion under insulation and soil-to-air interfaces reported separately, because these are the areas the. | Where the paperwork is tested against practice |
| Renewal | No company certificate. The individual API 570 certificate runs three years, on the same ICP rules as API 510: at least 20% of time over the certification period performing or supervising inspection, 24 CPD hours per three-year cycle, and a 25-question open-book web quiz every six years. Published fees are $875 USD member and $1,125 non-member for initial certification, $745 and $855 for recertification, and $350 to reschedule. The 2026 API 570 exam windows are 6–27 February and 5–26 June 2026. The code itself is on API's own revision cycle; the 5th edition is current. | Diarised from the certificate date, not the last audit |
How long does API 570 audit preparation take?
Document work — the written practice, procedures and quality manual — takes weeks. What cannot be compressed is documented experience and records history: on-the-job hours accrue in real time, and calibration and certification history cannot be back-filled. Firms that start when the audit is scheduled rather than announced clear it without findings.
What does American Petroleum Institute. API's Individual Certification Programs office certifies the Authorized Piping Inspector; the piping inspection programme is owned and enforced by the owner-user, and audited by the owner-user or by OSHA under process safety management look at first?
Records, not manuals. A manual states intent; records show practice. The usual opening move is to take a completed job and trace it back to the technician's certification, the instrument's calibration, the approved procedure and the report — and see whether all four reconcile.
What are the most common API 570 findings?
Readings recorded against a line number rather than a permanent condition monitoring location identifier, so no corrosion rate can be trended, Injection points and dead legs not maintained on a separate register with their own shorter intervals, Corrosion-under-insulation inspection reported with no record of where insulation was actually removed, Class 1 piping inspected on a Class 2 interval because the circuit was never reclassified after a service change. Almost all of them are evidence problems rather than capability problems: the work was done correctly and the proof was not kept, or was kept somewhere the firm could not retrieve during the audit.
Can a consultant attend the API 570 audit?
Yes, and it changes the outcome. Someone who has sat through the same audit at other firms answers in the auditor's own terms, produces the right record without a search, and stops a clarification turning into a finding. The firm still owns every answer — the consultant does not speak for it.
What happens after a API 570 finding?
A corrective action with a deadline, and evidence of closure at the next audit. Repeat findings are treated far more seriously than first ones, because they show the corrective-action system itself is not working.
Does API 570 require a pre-audit or gap assessment?
Not as a requirement, but the arithmetic favours it: a gap assessment finds the same evidence problems the auditor would, without the finding attached, and while there is still time to fix them. Firms entering their first API 570 audit blind typically collect findings that a sampling exercise would have caught.
What the auditor asks to see
- Owner-user piping inspection programme with the piping circuit list and each circuit's class designation
- Current API 570 certificate for each Authorized Piping Inspector
- Isometric drawings with condition monitoring locations and thickness measurement locations permanently identified
- Injection point, dead leg, small-bore piping and corrosion-under-insulation inspection registers
- NDE written practice, Level III-approved method procedures and examiner certification records
- Thickness data history with both short-term and long-term corrosion rates calculated
- Inspection reports signed by the Authorized Piping Inspector
- Repair, alteration and rerating records including welding procedure specifications, procedure qualification records and pressure test records
- Insulation removal and reinstatement records supporting corrosion-under-insulation inspection
Findings to close before the audit
- Readings recorded against a line number rather than a permanent condition monitoring location identifier, so no corrosion rate can be trended
- Injection points and dead legs not maintained on a separate register with their own shorter intervals
- Corrosion-under-insulation inspection reported with no record of where insulation was actually removed
- Class 1 piping inspected on a Class 2 interval because the circuit was never reclassified after a service change
- Ultrasonic procedure written for plate used on small-bore piping with no technique addressing curvature and wall thickness
- Examiner certified in ultrasonics generally with no documented qualification for the encoded or mapping technique actually used
- Only one corrosion rate calculated, so the governing rate between short-term and long-term is not identified
- Inspector certificate current but the programme still written to a superseded edition of API 570
Related: the API 570 overview, outsourced ASNT Level III cover, written practice development, NDT procedure development, a programme gap assessment, interim Level III cover.