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ASME B16.5 Long Weld Neck Flange/Intergal Flange Dimensions | ASTM A234 butt weld pipe fittings,A182 forged pipe fittings,B16.5 weld neck flange,API 5L seamless pipes
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DIN 2633 PN16 Welding Neck Flange Dimensions | ASTM A234 butt weld pipe fittings,A182 forged pipe fittings,B16.5 weld neck flange,API 5L seamless pipes
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