Stainless steel tube

carbon steelseamlesssolderless

SEAMLESS MEDIUM-CARBON STEEL BOILER AND SUPERHEATER TUBES ASTM A210 Standard : ASTM A210 —American Society for Testing and Materials Standards ASME SA210 — AmericanSociety of Mechanical Engineers standards Purpose : For boiler pipesand boiler flue pipe, including security side, the dome and the support tubeand superheater tubes minimum wall thickness of seamless carbon steel pipes. The mainproduction steel grades : A-1, C, etc. arenegotiated, but also supply other grades of steel. Hot-finished tubes need not be heat treated. Cold-finished tubes shall be given a subcritical anneal, a full anneal, or a normalizing heat treatment after the final cold-finishing process. The tubes shall have a hardness not exceeding the following: 79 HRB or 143 HRB for Grade A-1,89 HRB or 179 HRB for Grade C. Hydrostatic or Nondestructive Electric Test —Each tube shall be subjected to the hydrostatic, or, instead of this test, a nondestructive electric test may be used when specified by the purchaser In addition to the marking prescribed in Specifi-cation A 450/A 450M, the marking shall indicate whether the tube is hot-finished or cold-finished.