在现代建筑业和工业生产中，供排水，汽的管路中使用的管路用螺纹的标准，由过去长期使用的英制的惠氏螺纹，正向国际单位制（SI）靠拢。而我国管螺纹的代号及标准从套用原苏联标准到我国制图标准，部颁螺纹标准，虽然向经变更，但也属英制管螺纹，未能制定我们自己的国家标准 In modern construction and industrial production, pipe thread standards used in plumbing and steam lines are moving closer to the International System of Units (SI) from imperial Whitworth threads, which have historically been used. The code and standard pipe thread from the Soviet Union to the application of the original standard of China’s cartographic standards, ministerial thread standards, although to change, but also a British pipe thread, failed to develop our own national standards