Medium-carbon Steel Boiler

Yosun (Tianjin) Piping Engineering Co., Ltd. is one of the most credible manufacturers and suppliers of medium-carbon steel boiler in China. Please feel free to wholesale customized medium-carbon steel boiler at competitive price from our factory. If you have any enquiry about quotation, please feel free to email us.

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.

If pickling or shot blasting or both are required,this shall be specificallt stated in the order.

1.The steel shall conform to the reqirements as to chemical composition prescribed in Table 1

2.When a grade is ordered under this specification,supplying an alloy grade that specifically requires the addition of any element other than those listed for the ordered grade in Table 1 is not permitted.

The tubes shall have a hardness not exceeding the following:79 HRB or 143 HB for Grade A-1,89 HRB or 179 HB for Grade C.

When instrted in the boiler,tubes shall stand expanding and beading when properly manipulated,superheater tubes shall stand all forging,welding,and bending operations necessary for application without developing defects.

1.In addition to the marking prescribed in Specification A450/A450M,the marking shall indicited whether the tube is hot-finished or cold-finished.

2.Bar coding----In addition to the requirements in 14.1 bar coding is acceptable as a supplemental idnentification method.The purchaser may specify in the order a soecific bar coding system to be used.

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