We manufacture of butt weld pipe fittings to meet diverse material specification. Basically a cap will be applied, to shut down the end of a pipe. The Cap, as it is shown in the image below, is available for all pipe dimensions, and is sometimes also used for other purposes.A Stub End always will be used with a Lap Joint flange, as a backing flange.Stub Ends are available in almost all pipe diameters. Dimensions and dimensional tolerances are defined in the ASME B.16.9 standard. Light-weight corrosion resistant Stub Ends (fittings) are defined in MSS SP43.

Dimensional Tolerances of of End Caps ASME B16.9

Nominal Pipe Size	1/2 to 2½	3 to 3½	4	5 to 8	10 to 18	20 to 24	26 to 30	32 to 48
Outside Diameter at Bevel (D)	+ 1.6 - 0.8	1.6	1.6	+ 2.4 - 1.6	+ 4 - 3.2	+ 6.4 - 4.8	+ 6.4 - 4.8	+ 6.4 - 4.8
Inside Diameter at End	0.8	1.6	1.6	1.6	3.2	4.8	+ 6.4 - 4.8	+ 6.4 - 4.8
Overall Length (H)	3	3	3	6	6	6	10	10
Wall Thickness (t)	Not less than 87.5% of Nominal Wall Thickness

Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.

Dimensional Tolerances of of Stub Ends ASME B16.9

Nominal Pipe Size	1/2 up to 2½	3 to 3½	4	5 to 8	10 to 18	20 to 24
Outside Diameter at Welding End (OD)	+ 1.6 - 0.8	1.6	1.6	+ 2.29 - 1.6	+ 4.06 - 3.05	+ 6.35 - 4.83
Overall Length (F)	1.6	1.6	1.6	1.6	2	2
Outside Diameter of Lap (G)	+ 0 - 0.76	+ 0 - 0.76	+ 0 - 0.76	+ 0 - 0.76	+ 0 - 1.6	+ 0 - 1.6
Thickness of Lap (T)	+ 1.52 - 0	+ 1.52 - 0	+ 1.52 - 0	+ 1.52 - 0	+ 1.52 - 0	+ 1.52 - 0
Fillet Radius of Lap (R)	+ 0 - 0.76	+ 0 - 0.76	+ 0 - 1.6	+ 0 - 1.6	+ 0 - 1.6	+ 0 - 1.6
Wall Thickness (t)	Not less than 87.5% of Nominal Wall Thickness

Dimensional tolerances are in millimeters unless otherwise indicated and are equal ± except as noted.

Available Materials

Stainless Steel: ASTM A 312, A 213, A 249, A 269, A 358, A 240, A 276
Type: 202, 304, 304L, 304H, 316, 316L, 316Ti, 321, 321H, 317, 317L, 310, 310S, 409, 410, 420, 430 etc. 

Carbon Steel: ASTM A 106, A 53, API A 5L Gr A, B, C, ASTM A 333, Gr 1 to 6 (IBR & NON IBR) 

Alloy Stel: ASTM A 335, GR P1, P2, P5, P9, P11, P22, P91 

Nickel Alloys: Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy 904, Titanium, Tungston, SIlver Nickel, Zirconium, Palladium, Vanadium etc.

Copper Alloys: Aluminium, Copper, Brass & Gunmetal

Buttweld Fittings: ASTM A 403, A182, A 234, A 105, A 420, A 350 & LF2 etc. (IBR & NON IBR)