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Weld Neck Flanges

Weld Neck Flanges

Weld Neck Flanges are flanges that are attached to the pipe by welding the pipe to the neck of the pipe flange. This supports to pass on the stress from the weld neck to the pipe. This also decreases the high stress concentration at the base of the hub of the weld neck pipe flanges. They are mostly used in high pressure applications and the inside diameter of a weld neck flange is designed to match the inside diameter of the pipe. ECO Steel provides all grades as per the customer's specification too. We ensure high quality and timely delivery. We offer weld neck pipe flanges in various industries including shipbuilding, power generation, petrochemical plants, oil refineries, waste water treatment plants, paper mills, pharmaceutical plants.

Specifications :


Stainless Steel

ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L

Carbon Steel ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70
Alloy Steel ASTM A182 F1, F5, F9, F11, F22, F91
Size : 1/2″ (15 NB) to 48″ (1200NB)
Pressure Ratings : Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc.
Standards : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Features :
  • Durability
  • Flawlessness
  • Optimum strength
  • Applications :
  • Cement, Ship Building, Construction
  • Power & Nuclear Plants
  • Petrochemicals
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