Now a lot of life will use a variety of steel pipe, steel pipe is also divided into many types and models, still in the purchase of this knowledge must have some understanding of the steel pipe type specification table is to understand and know, at the same time for the classification of the steel pipe which is to have a full understanding of this is helpful to people's lives.
Steel pipe type specification table?
1, the usual length (also known as non-size length): Where the length of the standard length range and no fixed length requirements, are called the usual length. For example, the structural pipe standards: hot-rolled (extrusion, expansion) steel pipe 3000mm ~ 12000mm; cold-drawn (rolled) steel pipe 2000mmm ~ 10500mm.
2, sizing length: sizing length should be in the range of the usual length, is a fixed length of the contract requirements of the size. But the actual operation are cut out of the fixed length is unlikely, so the standard for the fixed length of the allowed positive deviation value.
3, times the foot length: times the foot length should be in the usual length range, the contract should indicate the single times the foot length and constitute a multiple of the total length (for example, 3000mm?3, that is, 3000mm 3 times the total length of 9000mm). In practice, the total length should be added to the total length of the basis of the allowable positive deviation of 20mm, plus each single times the length of the foot should be left to cut the margin. Structural pipe, for example, the provisions of the notch margin: outside diameter?159mm for 5 ~ 10mm; outside diameter> 159mm for 10 ~ 15mm.
What are the classifications of steel pipe?
1. Pipes. Such as: water, gas pipe, steam pipeline seamless pipe, oil pipeline, oil line pipe. Agricultural irrigation faucet with pipe and sprinkler irrigation pipe.
2. Thermal equipment pipe. Such as general boiler boiling water pipe, superheated steam pipe, locomotive boiler superheat pipe, large smoke pipe, small smoke pipe, arch brick pipe and high temperature and high pressure boiler tube.
3. Pipes for machinery industry. Such as aviation structural tube (round tube, oval tube, flat oval tube), automobile half-axle tube, axle tube, automobile tractor structural tube, tractor oil cooler tube, agricultural machinery square tube and rectangular tube, transformer tube and bearing tube, etc.
4.
4. Petroleum and geological drilling pipe. Such as: oil drilling pipe, oil drill pipe (square drill pipe and hexagonal drill pipe), drilling jerks, oil pipe, oil casing and a variety of pipe joints, geological drilling pipe (core pipe, casing, active drill pipe, drill jerks, press hoop and pin joints, etc.).
5. Chemical industry pipe. Such as: petroleum cracking pipe, chemical equipment heat exchanger and piping pipe, stainless steel acid pipe, fertilizer high-pressure pipe and pipe for transporting chemical media, etc.
6.
6. Pipes for other sectors. Such as: container tubes (high-pressure cylinder tubes and general container tubes), instrumentation tubes, watch case tubes, injection needles and their medical equipment tubes.
After reading the steel pipe type specification table introduced to you above, people for the content of this area is not all should have understood, there are about the steel pipe children again to buy, should be careful to identify and select, choose to the good quality of the classification of steel pipe what, after reading the above introduction to realize that there are so many classifications.
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