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Alloy steel pipes for high pressure service

 The range of Alloy steel pipes for high pressure service pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practice.




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Multi-rifled seamless steel tube

  Multi-rifled seamless steel tube is used as a water wall tube loaded with a highly heated flux and is also expected to find broadened other uses in the viewpoint of iits energy saving effect and higher safety against the overheating damage. This has groove on its inside surface which functions to raise thermal efficiency by distrubing the fluid within the tube, featuring and extremely high thermal conduction property. Available grades and size range: Multi-rifled seamless steel tube are produced to meet specific end use requirements, specifications, tolerances and chemistries. Standard Grade Specification O.D.(mm) W.T.(mm) Number of rib GB/T 20409-2006 20G 15CrMoG SA-210A1 SA-210C SA-213 T2 SA-213 T12 22-83 4.5-13    4-14     Grade and Chemical Composition (%) Steel Grade C Si Mn S P Cr Mo 20G 0.17-0.23 0.17-0.37 0.35-0.65 0.015 0.025 　 　 15CrMoG 0.12-0.18 0.17-0.37 0.40-0.70 0.015 0.025 0.80-1.10 0.40-0.55 A 210A1 SA-210A1 ≤0.27 ≥0.10 ≤0.93 0.020 0.025 　 　 A 210C SA-210C ≤0.35 ≥0.10
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ASTM A179 Heat Exchanger Tubes

  ASTM A179/A179M, ASME SA179/SA179M is the standard applicable to Seamless cold drawn low carbon steel heat exchanger and condenser tubes. When we place a specific order for SA 179 tubing, we should include below material specifications: Standard and the name of material: ASTM A179 / ASME SA 179 seamless tubes. Manufacturing types in cold drawn Size including Diameters and minimum wall thickness The factory actual scene of ASTM A179 tubes ASTM A179 Inspection Report U-Bend Fabrication Tolerances Item Condition (when) Tolercance   Nominal bend radius ≤ 2 x nominal OD less than or equal to 12% Ovality 2 x nominal OD < Nominal bend radius ≤ 4 x nominal OD less than or equal to 10%   Nominal bend radius > 4 x nominal OD  less than or equal to 5%   Nominal bend radius ≤ 2 x nominal OD 0.75 x nominal wall Mimimum wall thickness 2 x nominal OD < Nominal bend radius ≤ 4 x nominal OD 0.8 x nominal wall   Nominal bend radius > 4 x nominal OD 0.9 x nominal wall   Nominal bend radius 
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