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Forged Olet

Material: Stainless Steel, Duplex, Super Duplex, Nickel Alloys
Dimensions: ASME B16.11
Size: 1/4″ UP TO 24″
Class: 3000LBS,6000LBS,9000LBS
Form: Weldolet, Sockolet, Thredolet, Latrolet, Elbolet, Nipolet, Sweepolet etc.
Type: Screwed -Threaded NPT,BSP,BSPT, SW end, butt weld end

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Forged Pipe Fittings:
Forged Olet

Sockolet and Threadolet Standard Specifications

SOCKOLET GB/T19326、HG/T 21632、MSS SP-97

Nominal size		Branch pipe nominal size		Depth of socket	Face of fitting to crotch		Diameter of fitting		Socket wall thickness		Hole diameter
DN	NPS	DN	NPS	J_min	A_max		D_max		C_min		d1 nom
DN	NPS	DN	NPS	J_min	3000	6000	3000	6000	3000	6000	3000	6000
8-900	1/4-36	6	1/8	9.5	10	一	27	一	3.18	一	16	一
10-900	3/8-36	8	1/4	9.5	10	一	27	一	3.78	一	16	一
15-900	1/2-36	10	3/8	9.5	13	一	30	一	4.01	一	19	一
20-900	3/4-36	15	1/2	9.5	16	24	38	47	4.67	5.97	24	19
25-900	1-36	20	3/4	12.5	16	25	47	53	4.90	6.96	30	25
32-900	1_1/4-36	25	1	12.5	22	29	56	63	5.69	7.92	36	33
40-900	1_1/2-36	32	1_1/4	12.5	22	30	66	74	6.07	7.92	45	38
50-900	2-36	40	1_1/2	12.5	24	32	75	83	6.35	8.92	51	49
65-900	2_1/2-36	50	2	16.0	24	37	90	104	6.93	10.92	65	59
80-900	3-36	65	2_1/2	16.0	25	一	105	一	8.76	一	76	一
100-900	4-36	80	3	16.0	30	一	124	一	9.52	一	94	一
125-900	5-36	100	4	19.0	30	一	154	一	10.69	一	121	一

THREADOLET GB/T19326、HG/T 21632、MSS SP-97

Run pipe nominal size		Branch pipe nominal size		Face of fitting to crotch		Diameter of fitting		Diameter a tend of branch pipe		Length of thread	Hole diameter
DN	NPS	DN	NPS	A		D1_min		D2_min		L2_min	d1 nom
DN	NPS	DN	NPS	3000	6000	3000	6000	3000	6000	L2_min	3000	6000
8-900	1/4-36	6	1/8	19	一	27	一	22	一	6.7	16	一
10-900	3/8-36	8	1/4	19	一	27	一	22	一	10.2	16	一
15-900	1/2-36	10	3/8	21	一	30	一	25	一	10.4	19	一
20-900	3/4-36	15	1/2	25	32	38	45	33	42	13.6	24	19
25-900	1-36	20	3/4	27	37	47	52	39	48	13.9	30	25
32-900	1_1/4-36	25	1	33	40	56	63	48	58	17.3	36	33
40-900	1_1/2-36	32	1_1/4	33	41	66	72	58	67	18.0	45	38
50-900	2-36	40	1_1/2	35	43	75	83	64	77	18.4	51	49
65-900	2_1/2-36	50	2	38	52	90	104	77	93	19.2	65	59
80-900	3-36	65	2_1/2	46	一	105	一	94	一	28.9	76	一
100-900	4-36	80	3	51	一	124	一	114	一	30.5	94	一
125-900	5-36	100	4	57	一	154	一	140	一	33.0	121	一

Note:

NPT thread shall be machined as per GB/T12716 (equivalent to ASME B1.20.1).

Tolerance for Fittings

Tolerance for SW Fittings

Nominal size		All fittings		Elbows、tees &crosses	Couplings	Half- couplings	Reducer inserts			Unions
Nominal size		Socket bore diameter	Bore diameter of fittings	Center to bottom of socket	End wall thickness	Laying length	Laying length	Shank diameter	Length	Laying length
DN	NPS	B	D	A.H	E	F	A	SD	SL	E
6-8	1/8-1/4	+0.4 0	+1.5 0	±1.0	±1.5	±1.0	+1.5 0	±0.25	0 -1.5	±1.5
10-20	3/8-3/4	+0.4 0	+1.5 0	±1.5	±3.0	±1.5	+1.5 0	±0.25	0 -1.5	±3.0
25-40	1-1_1/2	+0.4 0	+1.5 0	±2.0	±4.0	±2.0	+2.0 0	±0.25	0 -2.0	±4.0
50	2	+0.5 0	+1.5 0	±2.0	±4.0	±2.0	+2.0 0	±0.5	0 -2.0	±4.0
65-80	2_1/2-3	+0.5 0	+3.0 0	±2.5	±5.0	±2.5	+2.5 0	±0.5	0 -2.5	±5.0
100	4	+0.5 0	+3.0 0	±2.5	±5.0	±2.5	+2.5 0	±0.7	0 -2.5	一

Tolerance for Thread Fittings

Nominal size		Elbows,tees & crosses	Couplings	Half-couplings
Nominal size		Center-to-end	End-to-end	Elbows,tees&crosses
DN	NPS	A.J	W	W/2
6-8	1/8-1/4	±1.0	±1.0	±1.0
10-20	3/8-3/4	±1.5	±1.5	±1.5
25-50	1-2	±2.0	±2.0	±2.0
65-100	21/2-4	±2.5	±2.5	±2.5

Threadolet Standard Specifications

Nominal size		End-to-end	Length of thread
DN	NPS	W	L_5min	L_2min
DN	NPS	3000 & 6000	L_5min	L_2min
6	1/8	32	6.4	6.7
8	1/4	35	8.1	10.2
10	3/8	38	9.1	10.4
15	1/2	48	10.9	13.6
20	3/4	51	12.7	13.9
25	1	60	14.7	17.3
32	1_1/4	67	17.0	18.0
40	1_1/2	79	17.8	18.4
50	2	86	19.0	19.2
65	2_1/2	92	23.6	28.9
80	3	108	25.9	30.5
100	4	121	27.7	33.0

Note:

1) NPT thread shall be machined as per GB/T 12716 (equivalent to ASME B1.20.1).

Weldolet Standard Specifications

Run pipe nominal size		Branch pipe nominal size		Lengths			Diameter of fitting			Hole diameter
DN	NPS	DN	NPS	A			D2min			d1nom
DN	NPS	DN	NPS	STD	XS	Sch160	STD	XS	Sch160	STD	XS	Sch160
8-900	1/4-36	6	1/8	16	16	一	24	42	一	16	16	一
10-900	3/8-36	8	1/4	16	16	一	26	26	一	16	16	一
15-900	1/2-36	10	3/8	19	19	一	30	30	一	19	19	一
20-900	3/4-36	15	1/2	19	19	28	36	36	36	24	24	14
25-900	1-36	20	3/4	22	22	32	43	43	46	30	30	19
32-900	11/4-36	25	1	27	27	38	55	55	51	36	36	25
40-900	11/2-36	32	11/4	32	32	44	66	66	63	45	45	33
50-900	2-36	40	11/2	33	33	51	74	74	71	51	51	38
65-900	21/2-36	50	2	38	38	55	90	90	82	65	65	43
80-900	3-36	65	21/2	41	41	62	104	104	98	76	76	54
90-900	31/2-36	80	3	44	44	73	124	124	122	93	93	73
100-900	4-36	90	31/2	48	48	一	138	138	一	113	113	一
125-900	5-36	100	4	51	51	84	154	154	154	120	120	98
150-900	6-36	125	5	57	57	94	187	187	188	141	141	122
200-900	8-36	150	6	60	78	105	213	227	222	170	170	146
250-900	10-36	200	8	70	99	一	265	292	一	220	220	一
300-900	12-36	250	10	78	94	一	323	325	一	275	265	一
350-900	14-36	300	12	86	103	一	379	381	一	325	317	一
400-900	16-36	350	14	89	100	一	411	416	一	357	351	一
450-900	18-36	400	16	94	106		465	468	一	408	403
500-900	20-36	450	18	97	111	一	522	525	一	459	455	一
550-900	22-36	500	20	102	119	一	573	584	一	508	509	一
650-900	26-36	600	24	116	140	一	690	708	一	614	612	一

Note:

Dimension D2 is equal to the outside diameter of the branch pipe. and D4 is equal to the inside diameter of the branch pipe and is equal to the wall thickness of the branch pipe

Tolerances Of Outlets

Branch pipe nominal size		Threadolet	Sockolet		Weldolet
DN	NPS	A	B	D	D2	d4
6-20	1/8-3/4	±0.8	+0.5 0	+1.5 0	+0.8 -0.4	±0.4
25-100	1-4	±1.6	+0.5 0	+1.5	+0.8 -0.4	±0.4
125-300	5-12	±3.2	一	一	±6.8	±0.8
350-600	14-24	±4.8	一	一	±6.8	±0.8

The following figures show the allowable spacing tolerances between the outlet and the running pipe.

Class Of Outlets Vs Schedule Of The Connecting Run Pipe

Branch pipe nominal size		Type	Class of outlet	Schedule of the Connecting run pipe
DN	NPS	Type	Class of outlet	Schedule of the Connecting run pipe
6-100	1/8-4	Socket welding&threaded	3000	XS
15-50	1/2-2	Socket welding&threaded	6000	SCH160
6-600	1/8-24	Butt-welding	STD	STD
6-600	1/8-24	Butt-welding	XS	XS
15-150	1/2-6	Butt-welding	SCH160	SCH160

Note:

When the thickness (schedule) of the branch or running pipe exceeds the range indicated in the above table, the outlet can be fabricated to a special thickness, dimension, and shape against the agreement between the purchaser and manufacturer.

Why Source This Product from JN Alloy?

Full traceability from melt to final product — heat number, lot number, and mill certification on every piece.

In-house dimensional inspection and material verification (PMI testing by XRF).

Flexible order quantities — from single pieces for maintenance to full project tonnage.

Experienced technical sales team able to support material selection, standard interpretation, and weld procedure development.

Competitive lead times from our warehouse stock and established mill relationships.

Export packaging and documentation for projects worldwide.

Contact us with your pipe sizes, fittings list, or plate dimensions, and we will provide a detailed quotation with full material certification options.

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Forged Olet

Why Source This Product from JN Alloy?