Stainless stub end

Stainless are fittings used in place of welded flanges where rotating back up flanges are desired.

Leading Manufacturer and Exporter of Stainless Steel Stub End such as Stainless Steel Stub Ends ASTM A403, Stainless Steel Stub End 304L, Stainless Steel Stub End 316L, Stainless Steel Stub End 317, Stainless Steel Stub End 317L, Stainless Steel Stub Ends and many more items from China.

They are also called Lap Joints and Vanstone Flared Laps. A rotating back up flange seats itself against the back surface of the Stub End. When bolts are added, the clamping action of the bolts presses the rotating back up flange against the back of the Stub End. The gasket surface of the Stub End then presses against a gasket and another gasket surface providing joints like standard flange joints. The seal is made by the gasket surface of the stub end alone, the flange only provides the clamping pressure on the joint.

1)seamless, single-slit tube wall thickness: 1 / 2 “NPS Sch5S The 24 “OD x 30mm
2)double-slit tube wall thickness: from 10 “to 58” OD x 30mm

Manufacturing standards of Stainless stub end:
1) ASTM ASME A/SA 403 MSS SP43 & SP75 ANSI B16. 9 ANSI B16. 28 ASTM A815 ASTM B363 B366
2) DIN2605 DIN2615 DIN2616 DIN2617
3) GB12459GB13401
4) JIS2313

Process of Stainless stub end:
1/2 “-16″(DN15 – DN400)overall molding cold flanging
18″-24″(DN450-DN600) argon arc welding to forming

Size of Stainless stub end:1/”-24″(DN15-DN600)
Standards:ASMEB16. 9, MSSSP43, HG205099, HG20621
Thickness:SCH5S-SCH40S

  • Large size cap
    Large size caps manufactured using superior grade raw materials.

Key Specifications/Special Features of Stub end

Our high quality stub ends (Butt weld fittings ) are tested and verified for durability, accuracy and precision. The stub ends are manufactured in all standard dimensions. The stub ends are provided with a standard weld bevel and can be available in squared, flanged, victaulic and threaded ends. We offer stub ends at highly competitive prices.

Stub end size data

Our high quality stub ends (Butt weld fittings ) are tested and verified for durability, accuracy and precision.
Size: 1/2″ – 24″
Types: Type A, Type B, Type C, Type D
Material: A234-WPB A234-WP12 A234-WP11 A234-WP5 A403-WP304 A403-WP304L A403-WP316. A403-WP316L A420-WPL6,316L, 304L, 321, 321H.
Manufacturing standard: ASME/ANSI B16.9, JIS, DIN, EN, API 5L, etc.
Surface treatment:Shot blasted, rust-proof black oil

Usage: Petroleum, Chemical, Power, Gas, Metallurgy, Ship-building, Construction, ect.