API Std 603-2025 第十版 標準發布

API Std 603《耐腐蝕栓接閥蓋閘閥 – 法蘭端和對焊端》第十版 標準發布

API Std 603《耐腐蝕栓接閥蓋閘閥 – 法蘭端和對焊端》第十版已于2025年7月發布。該標準規定了適用于工藝管道系統的耐腐蝕螺栓閥蓋閘閥的技術要求，該類閥門需符合ASME B16.34標準等級要求并具有全通徑流道。

該標準對下列閘閥特性提出具體要求：

• 螺栓連接閥蓋；

• 明桿支架式設計；

• 升降式閥桿；

• 非升降式手輪；

• 單閘板或雙閘板結構；

• 楔式或平行式密封；

• 金屬密封面；

• 法蘭端或對焊端連接。

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更新信息原文：

API Std 603, Corrosion-resistant, Bolted Bonnet Gate Valves—Flanged and Butt-welding Ends, 10th Edition has been published in July 2025. 

This standard identifies the design validation procedure requirements for a service class II or service class III API 6A surface safety valve (SSV), API 6A boarding shutdown valve (BSDV), or API 17D underwater safety valve (USV). Service class II is applicable to the validation of the valve bore sealing mechanism to seal performance in the presence of hard substances, such as sand. Service class III adds additional validation requirements for the performance in a similar environment of bonnet assembly sealing parts, including the stem seals. 

This standard specifies the requirements for corrosion-resistant bolted bonnet gate valves meeting the requirements of Standard Class, ASME B16.34 and having full port openings for use in process piping applications. This standard sets forth the requirements for the following gate valve features: 

    ? bolted bonnet; 

    ? outside screw and yoke; 

    ? rising stems; 

    ? non-rising handwheels; 

    ? single or double gate; 

    ? wedge or parallel sealing; 

    ? metallic seating surfaces; 

    ? flanged or butt-welding ends.