Joho Steel Co., Ltd
JOHO STEEL CO.,LTD, founded in 1988, is a steel group which has integrated steel production, processing and trading into one. We specializes in manufacturing carbon seamless steel pipes, boiler tube
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Alloy Steel Pipe China Professional Manufacturer
Size : OD:19.5-101.6MM
WT : 2-12MM
Application
For boiler, superheater and heat exchanger quipment, such as tubular heat exchanger, condenser and superheater
Production Standard
ASTM A213 T11, T12, T22, T5, T9
ASTM A335 P11, P12, P22, P5, P9
ASTM A199 T11, T22, T5
ASTM A209 T1. T1A, T1B
Surface treatment
Oil, Varnish, Passivation, Phoshating, Shot Blasting
Delivery Condition
Annealed, Nomalized, Normalized and Tempered
Inspections and test
Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Hardness Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, NDT TEST ( ET TEST, UT TEST)