Shanghai ShengQiu Materials Co., Ltd supplies small size seamless U tube with competitive price:Standard and Grade:ASTM/ASME A/SA179ASTM/ASME A/SA192ASTM/ASME A/SA210 Gr.A1,Gr.CASTM/ASME A/SA209 T1,T1AASTM/ASME A/SA213 T5,T9,T11,T12,T22,T91ASTM/ASME A/SA334 Gr.1,Gr.3,Gr.6ASTM/ASME A/SA556 Gr.A2,Gr.B2,Gr.C2DIN/17175 St35.8,15Mo3,13CrMo44,10CrMo9-10EN10216-2 P235GH,16Mo3,13CrMo45,10CrMo9-10O.D.:19MM--89MMW.T.: 2MM--10MMLength: 3--22METERSApplication: the products are widely used in the industries of petrochemical refinery, electric power, mechanical boiler, energy, offshore oil, vessel heat exchanger and others.Send us inquiry for good price!