On November 5th, the SFF Norwegian delegation once again visited Dongtai Yuanyang Stainless Steel Manufacturing Co., Ltd. to carry out the qualification certification review of duplex steel manufacturers. …

Dongtai Yuanyang Stainless Steel Manufacture Co., Ltd., established in 2001, specializes in producing flanges, fittings and prefabricated pipe components (spools) made of austenitic stainless steel, (super) duplex stainless steel, high-temperature…

Our current flange standards are divided into two systems, namely PN series (European system) and Class series (American system).The nominal pressure level of PN series is expressed by PN, including the following nine levels: PN2.5, PN6, PN10, PN16, PN25…

The so-called duplex stainless steel is in its solid quenching organisation in the ferrite phase and austenite phase each half, generally the least phase content of perhaps to reach 30%. Duplex stainless steel is based on 18-8 austenitic stainless steel…

Stainless steel welded pipe is mainly used in heat exchange pipe, fluid pipe, pressure pipe, mechanical structure pipe, city landscape and other industries. The demand for stainless steel welded pipe for industrial use is large, and the production process…

First, commonly used stainless steel pipe implementation standards: GB national standard (GB/T14976, GB/T14975, GB/T13296); ASTM American Standard (A312/A312M, A213/A213M, A269/A269M); ASME American Standard, DIN German Standard (2462, 17456, 17458);…