API Std 603-2025 第十版 标准发布

API Std 603《耐腐蚀栓接阀盖闸阀 – 法兰端和对焊端》第十版 标准发布

API Std 603《耐腐蚀栓接阀盖闸阀 – 法兰端和对焊端》第十版已于2025年7月发布。该标准规定了适用于工艺管道系统的耐腐蚀螺栓阀盖闸阀的技术要求，该类阀门需符合ASME B16.34标准等级要求并具有全通径流道。

该标准对下列闸阀特性提出具体要求：

• 螺栓连接阀盖；

• 明杆支架式设计；

• 升降式阀杆；

• 非升降式手轮；

• 单闸板或双闸板结构；

• 楔式或平行式密封；

• 金属密封面；

• 法兰端或对焊端连接。

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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.