... /AISI/DIN/JIS 3) OD : 1/2''-48'' U-tubing uses in heat transferring pipeline of heat-exchanger,superheater ... petrol,chemical,thermal power generation and nuclear power industry.U-tubing with wide size range,common austenitic stainless ... 316/316L,321.347 and so on,the Min bend radius R≥1.5D,for duplex stianless steel ... UNS S31803,UNS S32205 and so on,the Min bend radius R≥2.0D.(Note:D is nominal diameter ...