Stub End

Butt Welding Pipe Fittings

Size: 1/2"-80"

Material: Carbon Steel or Stainless Steel

Standard: ASME/ANSI B16.9

End: beveled end

Surface: Rust-proof Oil

Wall Thickness: SCH10/10S, SCH20/20S, STD, SCH40/40S, XS, SCH80,SCH100, SCH120, SCH140, SCH160, XXS etc.

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Introduction

The stub ends are usually used with lap joint flanges, both of stub and lap joint flange can be purchased from EATHU. This flanged joint is an inexpensive flanged joint method suitable for low pressure and non-critical applications. Since the flange does not come into direct contact with the pipe, carbon steel short joints can be used to reduce the total weight and cost.

ASME B16.9: Lap Joint Stub Ends Wrought Steel Buttwelding Fittings (ASME)

Carbon-Steel-Stub-End

Dimensions of ASME B16.9 MSS SP-43

Nominal Pipe	Outside Diameter		Outside Diameter of Barrel				Diameter of Lap G
Size	at Bevel OD		Max		Min		(Nominal & Max)
(NPS)	IN	MM	IN	MM	IN	MM	IN	MM
½	0.84	21.3	0.896	22.8	0.809	20.5	1.38	35
¾	1.05	26.7	1.106	28.1	1.019	25.9	1.69	43
1	1.32	33.4	1.376	35	1.284	32.6	2	51
1¼	1.66	42.2	1.716	43.6	1.629	41.4	2.5	64
1½	1.9	48.3	1.965	49.9	1.869	47.5	2.88	73
2	2.38	60.3	2.456	62.4	2.344	59.5	3.62	92
2½	2.88	73.0	2.966	75.3	2.844	72.2	4.12	106
3	3.5	88.9	3.596	91.3	3.469	88.1	5	127
3½	4	101.6	4.096	104	3.969	100.8	5.5	140
4	4.5	114.3	4.593	116.7	4.469	113.5	6.19	157
5	5.56	141.3	5.683	144.3	5.532	140.5	7.31	185
6	6.62	168.3	6.743	171.3	6.594	167.5	8.5	218
8	8.62	219.1	8.743	222.1	8.594	218.3	10.62	270
10	10.75	273.0	10.913	277.2	10.719	272.3	12.75	324
12	12.75	323.8	12.913	328	12.719	323.1	15	381
14	14	355.6	14.17	359.9	13.969	354.8	16.25	413
16	16	406.4	16.18	411	15.969	405.6	18.5	470
18	18	457	18.19	462	17.969	456	21	533
20	20	508	20.24	514	19.969	507	23	584
22	22	559	22.24	565	21.969	558	25.25	641
24	24	610	24.24	616	23.969	609	27.25	692

Dimensions of ASME B16.9 MSS SP-43

Nominal	Length F				Radius R
Pipe	ASME Long		ASME Short & MSS		MSS Type A & ASME (Nominal & Max)		MSS Type B (Max)
Size	ASME Long		ASME Short & MSS		MSS Type A & ASME (Nominal & Max)		MSS Type B (Max)
(NPS)	IN	MM	IN	MM	IN	MM	IN	MM
½	3	76	2	51	0.12	3	0.03	0.8
¾	3	76	2	51	0.12	3	0.03	0.8
1	4	102	2	51	0.12	3	0.03	0.8
1¼	4	102	2	51	0.19	5	0.03	0.8
1½	4	102	2	51	0.25	6	0.03	0.8
2	6	152	2.5	64	0.31	8	0.03	0.8
2½	6	152	2.5	64	0.31	8	0.03	0.8
3	6	152	2.5	64	0.38	10	0.03	0.8
3½	6	152	3	76	0.38	10	0.03	0.8
4	6	152	3	76	0.44	11	0.03	0.8
5	8	203	3	76	0.44	11	0.06	1.5
6	8	203	3.5	89	0.5	13	0.06	1.5
8	8	203	4	102	0.5	13	0.06	1.5
10	10	254	5	127	0.5	13	0.06	1.5
12	10	254	6	152	0.5	13	0.06	1.5
14	12	305	6	152	0.5	13	0.06	1.5
16	12	305	6	152	0.5	13	0.06	1.5
18	12	305	6	152	0.5	13	0.06	1.5
20	12	305	6	152	0.5	13	0.06	1.5
22	12	305	6	152	0.5	13	0.06	1.5
24	12	305	6	152	0.5	13	0.06	1.5

*All dimensions are in mm unit(inch unit data sheet is also available upon request).

*Check the tolerances and materials for butt welding pipe fittings from "Price List and Techinical"

*Tolerances of dimensions are in conformance with ASME B16.9

Question: I want to know the difference between Stub End Type A and Type B, which one is more suitable for me?

Eathu answer: Stub End has three different types – Type A, Type B, Type C, they are classified by the different “R” – the lap corner. But in actual working, “type A” is the common type as it is matching with lap joint flange specially.

Type A: To match standard lap joint flange, it is the default type if the client didn’t indicate the type specifically.

Type B: Stub End B type is mainly used for slip-on flanges and backing flanges, its lap angle is different from “type A”.

Type C: It can be used either with lap joint flange or slip-on flange. But it is not common type, most of eathu customers need “Type A” or “Type B” stub end.

Butt welding pipe fittings standard:

ASME B16.49-2007 Factory-Made,Wrought Steel, Buttwelding Induction Bends for Transportation and

ASME-B16.9-2007 Factory-Made Wrought Butt Welding Fitting

DIN2617-1991 Steel butt-welding pipe fittings

JIS G3452 SGP 1997 Steel Butt-welding pipe fittings for ordinary use

Weight for butt welding pipe fitting

Tolerances for ASME DIN JIS MSS Butt Welding Pipe Fittings

Wall Thickness Schedules (ASME B36.10 B36.19)

You can also contact Eathu info@eathu.com for the A234 fittings' standard.

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