Supply flange, large flange, 316L large stainless steel flanges, Hongyuan tube industry professional (Contact Person: Feng Hongmei Contact: 15,932,713,817 QQ: 1,763,757,819) large flange means is beyond the size of the relevant state departments under flange making such flange to make the construction side of the drawing to produce production process forging and rolling and splicing of three large flange means beyond the size of the relevant state departments under flange. Generally refers to the the DN2000 size flange. Such a product is all the welded products, no threaded. 0.25MPa and 0.6MPa national flange into the standard GB/T9119-2000 pressure standard among the largest size is DN2000. 1.0MPa pressure standard is to DN600's. Such flanges are fabricated to produce drawings to make the construction side. Production forging and rolling and splicing of three. Product technology first in plate cut into the right sliver sliver length in accordance with the specifications of the large flange. Then made a circle ring machine volume with the volume interface electrode welding firm, the weld at the X-ray spectrum test. Then presses flatten, and then lathe machining waterline, chamfering process, and finally with the drilling machine with indexing plate bolt hole punch processing.