din 17175 equivalent astm a179 seamless steel tube

ASTM A519 seamless carbon and alloy steel mechanical tubing


application: for mechanical engineering






ASTM A179/ASME SA179 cold drawn low carbon steel heat exchanger and conderser tubes


application: for tubelar heat exchangers,condensers and similar heat transfer apparatus .






Astm A192 Seamless Carbon Steel boiler tues for high-pressure


application: for seamless carbon steel boiler and superheater tubes for high-pressure service






OD:OD :6.0-114, thickness;1mm-15mm, length:max 12 meters







1 standard A 192/A 192M-02

2 seamless carbon steel boiler tubes

3 for high-pressure

4 process: hot-finshed or cold finished





1 HEAT TREATMENT





hot treatment: hot-finished tubes need not to be heat treated,cold finished tubes shall be heat treated after the finial


cold-finishing at a temperature of 1200 F (650C) or higher





2 CHEMICAL COMPOSITION





C:0.06-0.18


Mn:0.27-0.63


P: Max 0.035


S: Max 0.035





3 HARDNESS REQUIREMENTS





the tubes shall have a hardness number not exceeding the following:


tubes 0.2[ (5.1mm) and over in wall thickness 137HB


tubes less than 0.2" (5.1mm) in wall thickness 77HRB





4 MECHANICAL TESTS REQUIRED





A. Flattening Test


B. Flaring Test


C.Hardness Test


D. Hydrostatic Test

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