ERW STEEL PIPE Standard: GB/T 13793, YB/T5209, GB9947 Steel Grade: Q195,Q235,SPHC,SPHT2,SS400 OD: 12. ... T5209, GB99472) Widely for HRSG, Boiler; Heat Exchanger, Condensor; Pipeline; Mechanical Machine; Structure; Automobile.3) All steel alloy pipe products are made under ... of burr inside by product line for ID 25-76, and we can also supply special strength pipe as clients' requirements. ERW STEEL PIPE