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。
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.
介绍了常见的用于紧固联接英寸制螺纹和用于管道连接英寸制螺纹的牙形、配合和标识，以及管螺纹的密封特点。
The tooth shape, fit and mark of clamping connection and pipe connection inch threads commonly used are introduced and their seal features.
油井管螺纹切削加工中产生的毛刺会直接影响螺纹检验的准确性和螺纹连接质量。
The accuracy of thread inspection and quality of threaded connection will be influenced by burrs resulted from the thread cutting process of tubing and casing.
本发明的笔芯，包括带有笔尖的芯管，其特殊之处在于：笔尖通过螺纹连接在笔芯上。
The invention relates to a pen core, which comprises a core pipe with a pen tip. The pen core is characterized in that the pen tip is connected to the pen core through screw threads.
这种阀门问世30多年来，其阀体长度和管套接连接件上的强力改进顶点螺纹始终没有改变。
The laying length of the body and the heavy-duty modified-acme threads in the union connections to the body have not changed in the 30-year history of the valve.
连接两节管子(生产油管、套管或衬管等)所用的带螺纹的连接件。
A threaded coupling used to join two lengths of pipe such as production tubing, casing or liner.
通过顶部玻璃纤维绝缘层可以连结管道和电源。使用如图所示的弯管、螺纹接头、管道接头连接冷水进水管和热水出水管。
Connect the cold water supply line and hot water outlet lines using elbows, nipples and unions as shown in the diagrams.
无接箍式套管靠管体两端的螺纹连接，所以套管外径尺寸小，可增大环形间隙，便于套管下入和提高固井质量。
It connects with threads on both ends of pipe body, which allows a smaller casing O. D. and increases annular gap to facility casing running in and improve cementing quality.
本实用新型所涉及的管件接头，可以取代常用的螺纹或焊接或螺纹卡套式连接。
The utility model relates to a tube fittings joint that is capable of replacing the traditional screw thread or welding or screw thread blocking connection.
上套管和下套管通过螺纹管连接在一起。
The upper sleeve is connected with the lower sleeve via a threaded tube.
管接头，该管接头包括接 头管和压盖，压盖和接头管通过螺纹可拆卸式连接，接头管的端头部设置有卡环座；
The pipe joint comprises a joint pipe and a press cover detachably connected with the joint pipe through screw thread, wherein, a clamp ring base is arranged on the head section of the joint pipe;
管接头，该管接头包括接 头管和压盖，压盖和接头管通过螺纹可拆卸式连接，接头管的端头部设置有卡环座；
The pipe joint comprises a joint pipe and a press cover detachably connected with the joint pipe through screw thread, wherein, a clamp ring base is arranged on the head section of the joint pipe;
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