Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

How to detect welded steel pipe hardness


How to detect welded steel pipe hardness
Welded with steel plates or steel after bending , then welded steel. Press the seam into the form of longitudinally and spirally welded pipe . Divided according to purpose and general welded pipe, galvanized pipe , oxygen pipe, wire casing , metric pipe , roller pipe, deep well pump tube , automotive tube , transformer tube , welding thin-walled tube , welding shaped tube and spiral welded pipe . General Pipe : Average pipe used to transport low pressure fluid . With Q195A, Q215A, Q235A steel. Easy welding may also be used in other soft steel. Pipe to carry water pressure, bending , flattening and other experiments , there are certain requirements for surface quality , delivery is usually a length of 4-10m, often required length ( or double length ) delivery. Pipe specifications expressed with nominal diameter ( mm or inch ) nominal diameter different from the actual , pipe wall thickness according to the provisions of ordinary steel and thicker steel are two forms of steel pipe end divided by threaded and non- threaded two kinds .
welded steel pipe
Following is a brief introduction to the application of several pipe
1 , generally used for water, gas , air, oil and heating steam and other general low pressure fluid delivery.
2 , ordinary carbon steel wire casing (GB3640-88) is an industrial and civil construction, installation of machinery and equipment for the protection of electrical installation engineering steel wires .
3 , straight seam welded pipe (YB242-63) is parallel to the longitudinal weld steel pipe and steel pipe . Usually divided into metric welded tubes, welded thin-walled tube , transformer cooling pipes and so on.
4, the pressure transmission fluid with spiral submerged arc welded pipe (SY5036-83) is a hot-rolled steel strip coils for the tube , often warm spiral shape , with double-sided submerged arc welding method for pressure fluid transfer spiral pipe joints . Strong pressure steel , welding performance, through a variety of rigorous scientific examination and testing , the use of safe and reliable. Large diameter steel pipe , transmission efficiency, and can save the laying of pipeline investments. Mainly used to transport oil , natural gas pipelines .
5, the pressure transmission fluid with high-frequency spiral welded pipe (SY5038-83) is a hot-rolled steel strip coils for the tube , often warm spiral shape , lap welding method with high frequency welding , pressure fluid transport frequency spiral welded steel pipe. Strong pressure steel , plastic, and easy welding and machining molding ; through a variety of rigorous and scientific examination and testing , the use of safe, reliable, large diameter pipe , transmission efficiency, and save the laying of pipeline investments. Mainly used for laying transport oil, natural gas and other pipelines .
6 , the general low pressure liquid delivery spiral submerged arc welded pipe (SY5037-83) is a hot-rolled steel strip coils for the tube , often warm spiral shape , using double-sided automatic submerged arc welding or welding into the legal system for water, gas , air and steam low pressure liquid delivery SAW pipe.
Pipe can be used cloth, Luo, Victoria three kinds of hardness test method for the determination HB, HRB ( or HRC) and the HV hardness value, three kinds of hardness values ​​measured only one can be. The latest development of portable surface Rockwell hardness tester, Rockwell hardness pipe , can be fast, accurate hardness testing , making it difficult in the past to solve the problems in China .

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