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GB/T 4622.2-2008 in English

GB/T 4622.2-2008 in English

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Dimensions for Spiral Wound Gaskets for Pipe Flanges

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《GB/T 4622.2-2008缠绕式垫片 管法兰用垫片尺寸》由TC237(全国管路附件标准化技术委员会)归口,主管部门为中国机械工业联合会。
GB/T 4622《缠绕式垫片》由三个部分组成,本部分为GB/T 4622.2-2003《缠绕式垫片 管法兰用垫片尺寸》。
GB/T 4622的本部分规定了管法兰用缠绕式垫片的型式与尺寸。
本部分适用于公称压力为PN10~PN250和Class150~Class1500的管法兰用缠绕式垫片。
本部分与GB/T 4622.2-2003相比主要变化如下:
―――修改了原标准中公称压力的标记方式,取消了公称压力数值后的单位。如原标准中PN1.6MPa现修改为:PN16;原标准中属于美洲体系的垫片尺寸公称压力用PN标记,现修改为用Class标记,如原标准中的PN2.0MPa现修改为Class150;
―――垫片尺寸按PN和Class两个公称压力系列分别排列;
―――删除了第3章“垫片型式”、第4章“与法兰密封面相适用的垫片型式”和第6章“缠绕式垫片的分类及标记”、第7章“缠绕式垫片的技术条件”;
―――修改了带内环型垫片的尺寸;
―――修改了带定位环、带内环和定位环型垫片的D1、D2和D3尺寸;以PN标记的带定位环、带内环和定位环型垫片的D3尺寸改按PN10~PN40、PN63~PN250段分列;
―――删除了以Class标记的DN650及以上带定位环型垫片尺寸;
―――以PN标记的垫片公称尺寸扩大至DN3000、公称压力提高到PN250。


This part of GB/T 4622 specifies the types and dimensions of spiral wound gaskets for pipe flanges.
This part is applicable to spiral wound gaskets for pipe flanges whose nominal pressure is within the range of PN10~PN250 and Class150~Class1500.

1 Scope 1
2 Gasket Types 1
3 Gasket Dimension 2

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