... flanges with difference size,easy maintain,best price with high quality high quality flanges Packaging & DeliveryPackaging Detail:No Fumigate or Fumigate ... , AS21293) Type: Plate, Slip-on, Welding Neck. Thread, Socket Weld, Blind Flanges4) Material: A105, SS400, SF440, RST37.2 ... long term cooperation. 3:COMPETITION: a:Quality control : ISO 9001 International Quality Control System Certificate. b: R&D ...