SA 213 Boiler Tube

    SA 213 standard specification for seamless ferritic and austenitic alloy-steel boiler,super heater,and heat-exchanger tubes.

    1. Surface state:

    Austenitic steel pipe should be washed to remove the scale, when the use of bright annealing, you do not need pickling.

    2. Chemical analysis of finished products:

    It shall be analyzed from one billet or one pipe per furnace, and the chemical composition determined accordingly shall meet the specified requirements.

    3. Mechanical test and grain size:

    (1) Tensile test:Such as each batch of steel pipe ≤ 50 root, then take a sample for tensile test; each batch of steel pipe> 50, then two steel pipes should take two samples for tensile test.

    (2) Flattening test: in each batch of a finished tube at both ends of each sample to take a flattening test, but the root can not used as a flaring sample.

    (3) Flaring test: in each batch of a finished tube at both ends of a sample for a flaring test, but the root canal can not be used as a flattening sample.

    (4) Hardness test: from each batch of two tubes on the sample to do Brinell or Rockwell hardness test.

    (5) Water pressure test: each pipe should be hydrostatic test. When the buyer is specified, a non-destructive test may be used instead.

    (6) Grain size: according to ASME E112 standard test.

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