Slip on flange (stainless steel) ISO 9001 certificate CE Certificate Product Group: Slip on flange (stainless steel flange,forged flanges)Product Description1) Product Name: SO Flange 2) Material: 304, 316, 304L, 316L, 321 3) Size: DN15-500 4) Class 150LB, 300LB, 600LB, 1500LB5) Standard: BS4504, ASME B16.5, ETC Slip on flange, BS4504