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Spiral steel pipe technical requirements

Manufacturing method The use of hot-rolled steel pipe to do bad, often warm spiral shape, spiral automatic submerged arc welding method, internal and external submerged arc welding seam not be less than one. Allows the pipe from the strip end weld, steel head and pipe ends shall not be less than 300mm. After consultation with [...]

十月 16th, 2017|

The method of forming large-diameter seamless steel pipe

Large diameter seamless steel tube forming methods are: UOE method, conventional forming method, RBE roll forming method, JCOE molding method, C formation method, the people first party continuous bending method, etc.. A brief introduction is as follows: 1 . UOE first pre bending plate edge in U stamping die pressure into a U shape, and [...]

十月 13th, 2017|

Identify fake spiral pipe with several methods

    1) easy to render inferior spiral pipe collapsed.     2) inferior spiral steel outer appearance often pockmarked face.     3) easy to look shoddy spiral pipe scarring occurs.     4) easy to look shoddy spiral pipe cracking.     5) inferior spiral pipe simple scratches.     6) inferior spiral pipe without metallic luster, pale red or similar color of the pig [...]

十月 12th, 2017|

Spiral steel pipe welded pores Cause and Prevention Measures

Spiral steel pipe weld zone defects are easy to produce pores, thermal cracking, and undercuts.     Spiral steel pipe seam weld porosity affects not only dense, resulting pipeline leakage and corrosion will be induced point seriously reduce the weld strength and toughness.      Factors weld porosity are: the flux in the water, dirt, oxide and [...]

十月 11th, 2017|

JIS/ANSI steel elbow fittings

Sizes: 1/2 to 72 inches Pressure: Sch10 to Sch160 and XXS Carbon steel: A234 WPB ,WPHY-42, WPHY-46, WPHY-52, WPHY-60, WPHY-65, WPHY-70 Alloy steel: ASME A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91, and WP92 Stainless steel: ASTM A403 WP304, 304L, 316, 316L Standards: ANSI/ASME, DIN, ISO, JIS, GB, EN ,GOST Packing: wooden cases and pallets [...]

十月 9th, 2017|

Big Size Seamless Pipe

Product Name: ASTM A106 GRADE B SEAMLESS CARBON STEEL PIPES Details: Our main products include 8 series: Carbon steel seamless pipes for use in low and medium pressure boilers, petroleum casing tubes, ships, fluid conveyance, petroleum cracking, chemical fertilizer equipments, structures, and hollow pumping rods. We can produce seamless steel pipes from OD1/4" to OD24", [...]

九月 30th, 2017|

Standard Classification of spiral steel pipe

Pressure fluid transport with spiral submerged arc welded pipe SY5036-2000, is mainly used to transport oil, natural gas pipelines;   Pressure fluid transport with spiral seam high frequency welded steel pipe SY5038-2000, high frequency lap welding method for spiral seam high frequency welded steel pipe pressurized fluid delivery. Strong pressure steel, plastic, and easy welding [...]

九月 29th, 2017|

How to increase stability of spiral steel pipe

1) small and medium sized steel, wire rod, rebar, in diameter steel pipe, steel wire and wire rope, etc., can be expected in a well-ventilated storage shed, but it must be on the thatch underlay. 2) some small steel, sheet, strip, silicon steel sheet, small caliber or thin-walled steel pipes, all kinds of cold-rolled, cold-drawn [...]

九月 28th, 2017|

How to prevent the spiral steel pipe factory steel products surface decarburization

Spiral pipe manufacturers - processed look decarbonization doubt, the key in the heat treatment step. Because oxidation and decarbonization and wire are carried out simultaneously, thus, during the heat treatment as long as possible and make the wire less air can reach improved touch decarbonization intentions. Example: A company selected two-lead groove oil quenching and [...]

九月 27th, 2017|

Performance of large-diameter spiral pipe

    In the steel standards, depending on the usage requirements of the tensile properties (tensile strength, yield strength or yield point elongation) and hardness, toughness index, as well as user requirements of high and low temperature properties. Mechanical properties of large diameter spiral pipe is: 1, hardness index     Metal material to resist indentation capacity hard surface [...]

九月 26th, 2017|