WE HAVE ATTAINED THE ISO9001:2008 ISSUED BY DNV, AND WE CAN SUPPLY THE BLD FLANGES AS PER YOUR REQUIREMENTS. 1)ASME B16.5 WELDING NECK, SLIP ON, BLIND, SOCKET WELDING, LAP JOINT2)DIN DIN 2566, DIN 2576, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2642, DIN 26733)BS4504 CODE101, CODE 105, CODE 111, CODE 112, CODE 1134)EN1092 TYPE 01, TYPE 02, TYPE 05, TYPE 11, TYPE 12, TYPE 13