Precision Ss 316 2205 Duplex Stainless Steel Seamless Welded Gas Pipes Tubes

Stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes and bimetal composite pipes, coatings and coated pipes to save precious metals and meet special requirements. There are many kinds of stainless steel pipes, different uses, different technical requirements, and different production methods. The current production of steel pipe outer diameter range 0.1-4500mm, wall thickness range 0.01~250mm. In order to distinguish its characteristics, the steel pipe is usually classified according to the following method.
Product Details

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Mechanical Tests Required

(1)Flattening Test-One flattening test shall be made on specimens from each of two tubes from each lot or fraction thereof.
(2)Flaring Test-One flaring test shall be made on speci- mens from each of two tubes from each lot  or fraction thereof.
(3) Flange Test-When specified as a substitute for the flaring test, for tubes having a wall thickness (actual mean wall) less than 10 % of the outside diameter, one test shall be made on specimens from each of two tubes
(4)Hardness Test-Rockwell hardness tests shall be made on specimens from two tubes from each lot.
(5) Hydrostatic Test-Each tube shall be subjected to the hydrostatic test, or a nondestructive electric test
 

Surface Condition
Finished tubes shall be free of scale. A slight amount of oxidation will not be considered as scale.
 

Product Marking
In addition to the marking prescribed in Specification A450/A450M, the marking shall include the name and order number of the purchaser.
Note: Material furnished under ASTM A179,ASME SA179 conform to the applicable requirements of the current edition of Specification A450/A450M

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