Usage characteristics of pipe cap and head

Usage characteristics of pipe cap and head

Tube cap and head manufacturers introduce the manufacturing process: The use of pipe cap and head is the same, but the head generally refers to the standard of GB/25198-2010, while in the user's welded pipe fitting standard of GB/T12459-2017, there is no word mention of the head, only the word of pipe cap appears, that is, in GB/T12459-2017, Even in GB/T13401-2017, it is also marked with a tube cap. There is no mention of the head, that is to say, in the steel butt welded seamless pipe fitting standard is the pipe cap. The specifications are all small, large GB/T12459-2017 outside diameter Φ813 and Φ820 specifications.

Pipe cap, also known as plug, cover, etc., it is welded in the pipe end or installed on the pipe end of the external thread to cover the pipe fitting, used to close the pipeline. The caliber of the official cap is generally within DN300, mainly used in the pipeline above, and the pipeline butt or as a blocking plate plays a strengthening role, not as the main compression element. Tube cap commonly used materials are: carbon steel :(20#, A3, Q235A, Q235B, 20G, 16Mn, ASTM A234WPB, ASTM A105, etc.); Stainless steel :(304, 304L, 316, 316L, S30408, S30403, S31608, S31603, SUS304, ASTM A403, TP321, 0Cr18Ni9, 00Cr19Ni10, 00Cr17Ni14Mo2, 1Cr18Ni9Ti, 06Cr17Ni12Mo2, 022Cr17Ni12Mo2, etc.) Cap diameter :DN15-DN800 Wall thickness :SCH10-SCH160 Standard :ASMEB16.9, GB/T12459-2017, etc.

The head is the end cap on the pressure vessel, which is a main pressure component of the pressure vessel. It acts as a seal. One is to make the bottom of the tank pressure vessel, the other is the pipe to the end, no longer ready to extend forward, then use a head to seal the pipe in the form of welding. According to the different geometric shapes, it can be divided into spherical, oval, dish, spherical crown, cone shell and cap, etc., among which the spherical, oval, dish and spherical crown head are also collectively known as convex head. Used in all kinds of container equipment, such as storage tank, heat exchanger, tower, reactor, boiler and separation equipment.

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