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استاندارد API 598

بازرسی و تست شیرها

Valve Inspection and Testing

نسخه 2009

Scope
1.1 This standard covers inspection, examination, supplementary examinations, and pressure test requirements for
resilient-seated, nonmetallic-seated (e.g. ceramic), and metal-to-metal-seated valves of the gate, globe, plug, ball,
check, and butterfly types. Resilient seats are considered to be:
a) soft seats, both solid and semi-solid grease type (e.g. lubricated plug);
b) combination soft and metal seats;
c) any other type valve designed to meet resilient seat leakage rates as specified in Table 6.
API 598 supplements the API standards that reference it, but it may also be applied to other types of valves by
agreement between the purchaser and the valve manufacturer.
1.2 The inspection requirements pertain to examinations and testing by the valve manufacturer and any
supplementary examinations that the purchaser may require at the valve manufacturer’s plant. The test requirements
cover both required and optional pressure tests at the valve manufacturer’s plant, or at a facility mutually agreeable to
both the manufacturer and purchaser.

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