尺寸: 1/2"-20" 材料: ASTM A105,GB/T699-1999 20# 标准和压力: ASME B16.5 Class150/300/600/900/1500 DIN 2527 PN6/10/16/25/40 JIS B2220 5K/10K/16K/20K/30K HG 20601 PN0.25/0.6/1.0/1.6/2.5/4.0/6.3/10.0/16.0/25.0 HG 20622 PN2.0/5.0/11.0/15.0/26.0/42.0 表面: 涂油,镀锌