API規格 API STD 598, 11th Edition, 2023: Valve Inspection and Testing

API規格 STD 598, 11th Edition, 2023

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API規格 STD 598, 11th Edition, 2023

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API STD 598, 11th Edition, 2023: Valve Inspection and Testing
API規格 598, 第11版 2023バルブの検査と試験
発行元 American Petroleum Institute (API)
発行年/月 2023年 2月   
装丁 ペーパー
ページ数 24 ページ
発送予定 海外倉庫よりお取り寄せ 1-2週間以内に発送します
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Description

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 semisolid grease type (e.g. lubricated plug);
b) combination soft and metal seats (e.g. laminated seat rings);
c) any other type of seat material designed to meet resilient seat leakage rates as specified in Table 5.

API Standard 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. Reference Annex A for information to be specified by the purchaser.

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 the purchaser.

The following tests and examinations are specified in this standard:

a) shell test,
b) backseat test,
c) low-pressure closure test,
d) high-pressure closure test,
e) double block and bleed high-pressure closure test,
f) visual examination of castings,
g) high-pressure pneumatic shell test