JB81-59, JB81-94 as the People's Republic of China machinery industry standard, the standard is applicable to the nominal pressure PN0.25-2.5 MPa this face plate flat steel tube welding flanges.

Guangzhou xin shun pipe fittings co., LTD. Is the hebei pipe production of professional manufacturers in the sales department of guangzhou, the company has advanced production lines, production of all kinds of elbow, flange, tee, four-way, bend, reducer, and seal the top tube.
The company production of carbon steel, alloy steel, stainless steel pipe fittings are gf used in petroleum, chemical industry, metallurgy, electric power, thermal and nuclear power, building, water, fire protection, shipbuilding, paper making, natural gas pipeline projects, etc.
Main product all pipe fittings, engaged in other pipe fittings. Customer service 020-29822918 QQ778101751
Company address: huangpu district of guangzhou huangpu east road no. 1086.
http://gzxsgj.1688.com