Stainless Steel Buttweld Fittings Exporter | SS Elbow, Tee, Reducer ASME B16.9 ASTM A403

ASME B16.9 • ASTM A403

Exporter & Stockist

Buttweld Fittings

We supply seamless and welded stainless steel buttweld fittings to ASME B16.9 and B16.28 — long and short radius elbows, equal and reducing tees, concentric and eccentric reducers, caps, stub ends and returns — in ½″ NB to 48″ NB.

Fittings are manufactured from ASTM A403 WP grades, solution annealed and pickled, with bevel ends to ASME B16.25. Wall thickness is supplied to match your pipe schedule so that root gaps and weld prep line up in the field.

01 Specifications

Size Range½″ NB to 48″ NB (Seamless up to 24″, Welded up to 48″)

ThicknessSch 5S, 10S, 40S, 80S, 160, XXS

StandardsASME B16.9, B16.28, MSS SP-43, MSS SP-75, DIN 2605/2615/2616, EN 10253

Types90° & 45° Elbow (LR/SR), 180° Return, Equal & Reducing Tee, Concentric & Eccentric Reducer, Cap, Stub End, Cross

Material SpecASTM A403 / ASME SA403 (WP-S, WP-W, WP-WX)

EndsBevelled to ASME B16.25

ManufacturingSeamless (hot/cold formed), Welded (100% RT on WP-WX)

FinishPickled & passivated, Mirror polish on request

MarkingSize, schedule, grade, heat no., standard stamped

02 Grades Available

SS 304 / 304L — WP304 / WP304LSS 304H — WP304HSS 316 / 316L — WP316 / WP316LSS 316Ti — WP316TiSS 317L — WP317LSS 321 / 321H — WP321SS 347 / 347H — WP347SS 310S — WP310SSS 904L — WP904LDuplex 2205 — UNS S31803 / S32205Super Duplex 2507 — UNS S32750 / S32760

Grades marked with a light-blue diamond are duplex / super duplex. Other austenitic, ferritic and nickel-alloy grades on request.

03 Dimension Chart

Elbows & ReturnsCenter-to-end dimensions per ASME B16.9. 45° LR elbow B = approx. 0.41 × A. SR elbows not standard below 1″ NB.

NPS	O.D. (mm)	90° LR — A	90° SR — A	180° LR — O
1/2	21.3	38	-	76
3/4	26.7	29	-	57
1	33.4	38	25	76
1 1/4	42.2	48	32	95
1 1/2	48.3	57	38	114
2	60.3	76	51	152
2 1/2	73.0	95	64	190
3	88.9	114	76	229
3 1/2	101.6	133	89	267
4	114.3	152	102	305
5	141.3	190	127	381
6	168.3	229	152	457
8	219.1	305	203	610
10	273.0	381	254	762
12	323.8	457	305	914
14	355.6	533	356	1067
16	406.4	610	406	1219
18	457.0	686	457	1372
20	508.0	762	508	1524
24	610.0	914	610	1829

Tees & CrossesEqual tee center-to-end per ASME B16.9. Reducing tee run C same as equal tee; outlet M per reducing outlet size.

NPS	O.D. (mm)	Run — C	Outlet — M
1/2	21.3	25	25
3/4	26.7	29	29
1	33.4	38	38
1 1/4	42.2	48	48
1 1/2	48.3	57	57
2	60.3	64	64
2 1/2	73.0	76	76
3	88.9	86	86
3 1/2	101.6	95	95
4	114.3	105	105
5	141.3	124	124
6	168.3	143	143
8	219.1	178	178
10	273.0	216	216
12	323.8	254	254
14	355.6	279	279
16	406.4	305	305
18	457.0	343	343
20	508.0	381	381
24	610.0	432	432

Reducers & CapsConcentric and eccentric reducers share the same end-to-end length H. Cap length E per ASME B16.9.

NPS	O.D. (mm)	Reducer Length — H	Cap Length — E
1/2	21.3	38	25
3/4	26.7	38	25
1	33.4	51	38
1 1/4	42.2	51	38
1 1/2	48.3	64	38
2	60.3	76	38
2 1/2	73.0	89	38
3	88.9	89	51
3 1/2	101.6	102	64
4	114.3	102	64
5	141.3	127	76
6	168.3	140	89
8	219.1	152	102
10	273.0	178	127
12	323.8	203	152
14	355.6	330	165
16	406.4	356	178
18	457.0	381	191
20	508.0	508	203
24	610.0	508	264