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spiral steel pipe
Product Name: Spiral steel pipe
Standard:  API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, JIS G3452, BS1387 
Surface:  Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy,? Fusion Bond Epoxy, 3-layers PE)
Size: 6mm- 610mm(1/16“-24”)
Thickness/Pressure: 0.3 mm-22mm

  Black steel:

  Black iron is the uncoated steel and is also called as black steel. When steel pipe is forged, a black oxide scale forms on its surface to give it the finish which is seen on this type of pipe. Because black steel is subject to rust and corrosion, the factory also coats it with protective oil. Those black steel are used for manufacturing pipe and tube, which will not rust for a long time and requires very little maintenance. It is sold in standard 21-foot lengths TBE.

  Usages of black steel pipe::

  Black steel pipe is widely applicable for ordinary uses in water, gas, air and steam, black steel tubes and pipes are utilized for gas distribution inside and outside the house and for hot water circulation in boiler systems. It is also used for line pipes in oil and petroleum industries, for water wells and for water, gas and sewage purposes. It is not used for potable water or for drain waste or vent lines.

  Black steel pipe:

  Black steel pipes and tubes are cut and threaded to fit the job. Fittings for this type of pipe are of black malleable (soft) cast iron. They connect by screwing onto the threaded pipe, after applying a small amount of pipe joint compound on the threads. Larger diameter pipe is welded rather than threaded. Black steel pipe is cut either with a heavy-duty tube cutter or cutoff saw or by hacksaw. When steel pipe is forged, a black oxide scale forms on its surface to give it the finish which is seen on this type of pipe. Because steel is subject to rust and corrosion, the factory also coats it with protective oil. Those black steel are used for manufacturing pipe and tube, which will not rust for a long time and requires very little maintenance. It is sold in standard 21-foot lengths TBE.

  Productblack steel pipe

  StandardU.S.A.ASTM A53/A106/A178/A179/A192/A210/A213/API 5L/5CT

  JapanJIS G3452/G3454/G3456/G3457/G3458/G3460/3461/3462/3464

  GermanDIN 1626/17175/1629-4/2448/2391/17200 SEW680

  BritainBS 1387/1600/1717/1640/3601/3602/3059/1775

  RussiaGOST 8732/8731/3183

  ChinaGB/T8162/T8163 GB5310/6579/9948

  Material GradeU.S.A.Gr. B/Gr.A/A179/A192/A-1/T11/T12/T22/P1/FP1/T5/4140/4130

  JapanSTPG38,STB30,STS38,STB33,STB42,STS49,

  STBA23,STPA25,STPA23,STBA20

  GermanST33,ST37,ST35,ST35.8,ST45,ST52,15Mo3,

  13CrMo44, 1.0309, 1.0305, 1.0405

  BritainLow, Medium, high

  Russia10, 20, 35, 45, 20X

  China10#, 20#, 16Mn, 20G, 15MoG, 15CrMo, 30CrMo,

  42Crmo, 27SiMn, 20CrMo

  black steel pipe

  dimensions and sizesOut Diameter8.7mm-720mm

  Wall Thickness0.75mm-120mm

  Length4-12m

  ProtectionPlastic caps/ Wooden case

  SurfaceBlack painting/varnished surface,anti-corrosion oil,

  galvanized or as per required by customer

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