Stainless steel pipe connection methods are diverse, common types of fittings are compression, compression, live joint, push, push threaded, socket welding, live joint flange connection, welding and welding and traditional connections combined with the derivative series of connections. The scope of application of these connections varies according to their principles, but most of them are easy to install, solid and reliable. Most of the gaskets or seals used in the connection are made of silicone rubber, nitrile rubber and EPDM rubber, which meet the standard requirements and eliminate the worries of users.
Steps of snap connection
1、Break the pipe: cut the pipe according to the required length, when breaking the pipe, do not use too much force to prevent the pipe from losing round.
2、Delete burr: After cutting off the pipe, the burr should be removed cleanly to avoid cutting the seal.
3、Marking line: In order to make the steel pipe completely inserted into the pipe socket, the length of insertion must be marked at the end of the pipe to draw a line.
4, assembly: the seal should be correctly installed in the U-shaped groove of the pipe fittings, the pipe into the pipe fittings socket, waiting for crimping.
5, crimping: crimping, the raised part of the pipe fittings placed in the mold concave groove, the jaws and tube axis to maintain vertical.
6, check: After crimping is complete, use a special gauge to check the size of the crimp.
Indication methods.
① chemical element symbols and the symbol of the country to indicate the chemical composition, using Arabic letters to indicate the content of the composition.
Such as: China, Russia 12CrNi3A
② with a fixed number of digits to indicate the steel series or numbers; such as: the United States, Japan, 300 series, 400 series, 200 series.
③ with Latin letters and order to form a serial number, only to indicate the use.
Numbering rules.
① the use of elemental symbols.
② Hanyu Pinyin, flat-furnace steel: P; boiling steel: F; sedimentation steel: B; Class A steel: A; T8: special 8; GCr15: ball.
◆Harmonized steel, spring steel, such as: 20CrMnTi 60SiMn, (with the C content expressed in parts per million).
◆Stainless steel, alloy tool steel (with a few thousandths of C content), such as: 1Cr18Ni9 one thousandth (i.e. 0.1% C), stainless C ≤ 0.08% such as 0Cr18Ni9, ultra-low carbon C ≤ 0.03% such as 0Cr17Ni13Mo.
Labeling method
The American Iron and Steel Institute is a three-digit number to label the various standard grades of malleable stainless steel. Among them.
① austenitic stainless steel with 200 and 300 series of numbers marked, for example, some of the more common austenitic stainless steel is marked with 201, 304, 316 and 310.
② Ferritic and martensitic stainless steels are indicated by numbers in the 400 series. Ferritic stainless steel is marked by 430 and 446, martensitic stainless steel is marked by 410, 420 as well as 440C, duplex (austenitic-ferritic).
③ Stainless steels, precipitation-hardening stainless steels, and high-alloys containing less than 50% iron are usually named using patented names or trademarks.