GOST 8731-78 Cold Drawn High Quality Seamless Carbon Steel Pipe

MOQ: 5 Tons

Sample :Provide

Alloy Or Not: Non-Alloy

Special Pipe: API Pipe,OtherEMT Pipe,Thick Wall Pipe

Tolerance ±15%, ±5%, ±1%, ±10%

Oiled or Non-oiled: Slightly Oiled

Delivery Time:15-21 days

Material: 10#20#45#15Mn20Mn.45Mn.30Mn2

1. Pipes for pipes.

Such as: seamless pipes for water, gas pipes, steam pipes, oil pipelines, and pipes for oil and natural gas trunk lines. Agricultural irrigation faucets with pipes and sprinkler irrigation pipes, etc.

2. Tubes for thermal equipment.

Such as boiling water pipes, superheated steam pipes for general boilers, superheating pipes, large smoke pipes, small smoke pipes, arch brick pipes and high temperature and high pressure boiler pipes for locomotive boilers.

3. Pipes for machinery industry.

Such as aviation structural pipes (round pipes, elliptical pipes, flat elliptical pipes), automobile semi-axle pipes, axle pipes, automobile tractor structural pipes, tractor oil cooler pipes, agricultural machinery square pipes and rectangular pipes, transformer pipes and bearings tube etc.

In order to obtain seamless pipes with smaller size and better quality, cold rolling, cold drawing or a combination of the two methods must be used. Cold rolling is usually carried out on a two-roll mill, and the steel pipe is rolled in an annular pass composed of a variable-section circular hole groove and a stationary conical head. Cold drawing is usually carried out on a single-chain or double-chain cold drawing machine of 0.5 to 100T.

Cold-drawn steel pipe is a steel pipe without seams on the surface of the entire steel pipe produced by drawing, extrusion, perforation, etc. It is a round, square and rectangular steel with a hollow section and no joints around it. It is made of steel ingots or solid tube blanks through perforation to make capillaries, and then cold drawn.

Cold-drawn steel pipes are precision cold-drawn seamless pipes with high dimensional accuracy and good surface finish for mechanical structures and hydraulic equipment. The use of precision seamless pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve material utilization, and help improve product quality.
High-quality carbon structural steel cold-drawn seamless pipes are mainly made of No. 10 and No. 20 steel. In addition to ensuring chemical composition and mechanical properties, hydraulic tests, hemming, flaring, flattening and other tests are required.