The pipes are used for carrying sewage, water, oil or gas. Therefore, the weld seams produced during the manufacture of the pipe must be absolutely leak tight.
用于传输城市污水，水，油或者天然气的管道在焊接时必须保证严格的密封以防止泄露。
The standard covers dimensions and gaging of plastic tapered National Pipe Threads (NPT) for leak-tight joints, and it is now referenced in all ASTM Standards for plastic piping products.
这个标准涵盖塑料美国锥管螺纹(NPT)的尺寸和计量方法，用于泄漏密封连接，现在已在所有有关塑料管道产品的ASTM标准中引用。
V47 temperature actuated valve features light weight, small volume and long life. The valve body is made of high temperature seal components for avoiding valve body Hugging tight or leak.
V47温度调节阀体积小，重量轻，安装简便，使用寿命长，阀体密封采用V型环高温密封组件，可防止阀杆过紧抱死或漏气的可能性。
When welding is required, all welds are subject to leak test to ensure the washer is water tight.
当需要焊接时，所有的焊接需进行泄漏测试，以确保清洗机没有任何漏水处。
The criterions of seal design are presented that can keep the joint leak-tight as well as not damaging the seal surface.
给出了设计石油套管特殊螺纹接头时，既能保证其密封性，又不至于发生粘结损坏的条件。
The criterions of seal design are presented that can keep the joint leak-tight as well as not damaging the seal surface.
给出了设计石油套管特殊螺纹接头时，既能保证其密封性，又不至于发生粘结损坏的条件。
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