... : weld neck flange, WNRF flange 2) Size: NPS 1/2"-120"(DN15-3000) 3) Varieties: 150lb/300lb 4) Material: CS ... ,AS,SS 1) Type: weld neck flange, WNRF flange, steel flange, ... /100/160/250...Class150lb/300lb/600lb/900lb/1500lb/2500lb4) Material: carbon steel, alloy steel, stainless steel5) Standred: ... DIN2628/DIN2629/GB-T9124/HG20592/SH3406/JB… weld neck flange