API 607 2022 vs API 607 2016: What Changed for Valve Manufacturers

API 607 is the fire test standard for quarter-turn valves — ball, butterfly and plug valves — and other valves with non-metallic seats. The current edition is API 607, 2022. If your valve model was qualified to the 2016 edition, the question is whether that certificate still satisfies your customers.

Why editions matter

A fire test certificate is tied to the edition of the standard it was tested against. Purchasers increasingly write the edition into the purchase order, and a certificate referencing a superseded edition is a common cause of document rejection at the document review stage. Knowing what actually changed tells you whether a re-test is genuinely required or whether your existing qualification simply needs a documentation update.

What the 2022 edition focuses on

• Clearer scope statements for quarter-turn and soft-seated valves, reducing ambiguity about which valves the standard covers
• Tightened definitions and test setup for burn exposure, thermocouple placement and flame characterisation, so results are more reproducible between laboratories
• Refined acceptance criteria for through-seat and external leakage, with clearer measurement intervals
• Improved guidance on qualification range — how a tested representative sample can cover a family of sizes and pressure classes
• Updated normative references to align with current API and ISO documents

The underlying principle is unchanged: burn the valve, keep it operable, and measure leakage during and after the burn. The changes are about precision, repeatability and scope clarity rather than a new test philosophy.

Do you need to re-qualify?

Re-qualification is normally triggered by one of the following:

1. The purchase order names the 2022 edition. This is the most common trigger and is not negotiable — if the contract names an edition, test to it.
2. The product changed. Any change to seat material, packing, body design, stem seal arrangement or manufacturing process can invalidate the original qualification.
3. The original certificate is old and the end user requires current-edition evidence. Some operators set their own recency rules.
4. You are entering a new market where the current edition is the de facto requirement.

If none of these apply, an existing 2016-edition certificate usually remains commercially usable, though it is worth confirming with the end user before relying on it.

Practical checklist before you re-test

• Confirm the exact edition required by each target customer — do not assume
• Confirm the qualification range you need (sizes and pressure classes), not just a single valve
• Verify that seat, packing and stem seal part numbers are unchanged since the original test
• Decide whether to bundle API 607 with ISO 10497 or API 6FA into one campaign
• Have drawings, material certificates and nameplate data ready before the sample ships

How Valverz can help

As a third-party testing body we run API 607 fire tests to the current edition, issue independent reports and certificates, and advise on qualification range so one campaign covers as much of your product family as the standard allows. Send the valve specification and target edition for a test plan and quotation within 1 working day. Contact: +86-18731031297 (WeChat available).