Wings union (WECO type)

Wing unions & swivel joints have been used in the oilfield services for almost a century.
Originally branded under the Weco® names, the wing unions & swivel joints have built a worldwide reputation with generation to generation of field operators.
The Weco® names have developed into generic terms for the products themselves, after so many years usage, rather than an individual brand or manufacturer.
The applied technologies of wing unions & swivel joints have proven their high level of efficiency in extremely severe flow conditions such as very high pressure & flowrates, high & low temperatures, multiphase flow, erosive and corrosive agents, vibration in pumping piping systems, etc.
Wing unions are also often referred to as hammer unions, hammer lug unions or Weco® dependent upon the customer or manufacturer.
Whatever name is used, they are the most common quick connection method for joining piping components together in a temporary system.

Male & Female subs

They are the pressure containing parts of the assembly that provide metal-to-metal primary seal.

Subs are manufactured per different assembly modes:
    Butt weld assembly
    NPT threaded assembly
    NPST threaded assembly
    Sub profiles are also machined / forged as an integral part of a piping element.

Nut :
This is a forged part of assembly that allows connection of the two subs through a specific Acme or Iso thread.

Seal Element :
Seal element is an elastomer component which acts as a secondary seal to protect metal-to-metal seal against corrosion.
Depending on the union figure it can be a lip type ”Seal Ring” or an ”O-Ring”.
Different materials are available to suit fluid service (Buna for Standard service or FKM for H2S service).

Quick connection

Figure	Working pressure (PSI)		NPT	BW up to SCH	1" 25mm	1"1/4 32mm	1" 40mm	2" 50mm	2"1/2 65mm	3" 80mm	4" 100m	5" 125mm	6" 150mm	8" 200mm	10" 250mm	12" 300mm
Figure	Standard	Sour GAS	NPT	BW up to SCH	1" 25mm	1"1/4 32mm	1" 40mm	2" 50mm	2"1/2 65mm	3" 80mm	4" 100m	5" 125mm	6" 150mm	8" 200mm	10" 250mm	12" 300mm
50	500	500
100	1,000	ND
200	2,000	2,000		80
206	2,000	2,000		80
207	2,000	2,000		80
400	4,000	4,000
400	3,000	3,000
400	2,500	2,500
602	2,500**	2,500**		80							(2,300 psi)
602	3,000	3,000
602	5,000	5,000
602	5,000**	5,000**		XXS	(6,000psi)		(6,000psi)	(6,000psi)
1002	3,000	3,000
1002	5,000	5,000
1002	7,500	5,000		XXS
1002	10,000	7,500		XXS
1003	3,000	3,000
1003	5,000	5,000
1003	7,500	5,000		XXS
1003	10,000	7,5000		XXS
1502	3,000	3,000
1502	5,000	5,000
1502	15,000	10,000		XXS
2002	20,000	ND		Spécial
2202	ND	15,000		Spécial

Danger : Avoid the DANGER for interconnecting 2" Fig 602 and Fig 1002 with 2" Fig 1502.

Never strike, tighten, loosen or attempt repairs on pressurised components or connections.
Always apply essential care, handling and inspection to threaded components before, during and after make-up.
Never use severely worn, eroded or corroded components.
Never strike wing unions nuts having severely flattened and extruded ears.
Always use a bronze hammer in order to avoid sparkling while striking onto a wing union nut.

NPST assembly

NPST (Non Pressure Seal Thread)3604-NPST-EN :
The NPST assembly is a special design for Higher Pressure service which can replace welded or conventionally Threaded union construction.
In this instance it can be seen from the illustration that the threads are not exposed to well effluent which is the case with conventional threaded (ie L.P.) components
This type of construction, on straight flowline and pup joints, is generally more economically priced when compared to integral equipment.

Type 50

Recommended service :
Suction service and very low pressure.
Main characteristics :
- Max pressure: 500 PSI STD & H2S service
- Working T: -20°F / 250°F
- Thread: ACME
- End connection: NPT Thread
- Sealing system : Metal to metal + o-ring on male side
- Material: A105 / A350 LF2 Mod

General dimension FIG. 50 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight (kg)
Union weco 50 - 4" NPT	4"	152,4	130,3	151	12,5
Union weco 50 - 5" NPT	5"	142,7	130,3	151	10

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.

Type 100

Recommended service :
Manifold and line connections Economical low-pressure union
Main characteristics :
- Max pressure: 1000 PSI STD & H2S service
- Working T: 20°F / 300°F
- Thread: ACME
- End connection: NPT Thread
- Sealing system: Metal to metal (fire resistance)
- Material: A395

General dimension FIG. 100 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight
Union weco 100 - 2" NPT	2	92	81	70	2,7
Union weco 100 - 2"1/2 NPT	2"1/2	109	100	83	4,5
Union weco 100 - 3" NPT	3"	124	114	102	6,4
Union weco 100 - 4" NPT	4"	146	135	132	10
Union weco 100 - 6" NPT	6"	171	152	190	20
Union weco 100 - 8" NPT	8"	187	184	243	30

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.

Type 200

Recommended service :
Manifold line connections, suction service, corrosion service.
Main characteristics :
- Max pressure: 2000 PSI STD & H2S service
- Working T: -40°F / 350°F
- Thread: ACME
- End connection: Butt welding (NPT or GAS Thread also available)
- Sealing system : Fig 200 : metal to metal
Fig 206: metal to metal + O-ring on male side
- Sub Material: A350 LF2

General dimension FIG. 200 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight (kg)
Union weco 200 - 1" NPT	1"	66	50	40	0,9
Union weco 200 - 1"1/4 NPT	1"1/4	71	57	51	0,9
Union weco 200 - 1"1/2 NPT	1"1/2	71	64	57	1,4
Union weco 200 - 2" NPT	2"	90	76	74	2,3
Union weco 200 - 2" NPT	2"1/2	105	90	84	4,1
Union weco 200 - 3" NPT	3"	115	102	104	5,9
Union weco 200 - 4" NPT	4"	125	119	130	8,2

General dimension FIG. 200 Butt Welding
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	øID (SCH 80)(mm)	Weight (kg)
Union weco 200 - 1" BW	1"	64,8	50	33,5	24,3	1
Union weco 200 - 1"1/4 BW	1"1/4	71	57	42,2	32,5	1
Union weco 200 - 1"1/2 BW	1"1/2	75	60	48,3	38,1	1,4
Union weco 200 - 2" BW	2"	82,9	72,5	60,3	49,2	2,6
Union weco 200 - 2"1/2 BW	2"1/2	105	90	73	59	4,1
Union weco 200 - 3" BW	3"	115,2	101,6	88,9	73,7	5,6
Union weco 200 - 4" BW	4"	126,4	117,3	114,3	97,2	7,3

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used

Type 206

Recommended service :
Manifold line connections, suction service, corrosion service.
Main characteristics :
- Max pressure: 2000 PSI STD & H2S service
- Working T: -40°F / 350°F
- Thread: ACME
- End connection: Butt welding (NPT or GAS Thread also available)
- Sealing system : metal to metal + O-ring on male side
- Sub Material: A350 LF2

General dimension FIG. 206 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight (kg)
Union weco 206 - 1" NPT	1"	67	51	40	0,9
Union weco 206 - 1"1/4 NPT	1"1/4	71	57	50	0,9
Union weco 206 - 1"1/2 NPT	1"1/2	71	64	57	1,4
Union weco 206 - 2" NPT	2"	83	76	71	2,3
Union weco 206 - 2"1/2 NPT	2"1/2	105	90	85	3,6
Union weco 206 - 3" NPT	3"	115	102	104	5,9
Union weco 206 - 4" NPT	4"	127	119	130	8,2
Union weco 206 - 6" NPT	6"	169	159	191	19,1
Union weco 206 - 8" NPT	8"	183	189	243	29,5
Union weco 206 - 10" NPT	10"	231	229	292	40,8

General dimension FIG. 200 Butt Welding
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	øID (SCH 80)(mm)	Weight (kg)
Union weco 206 - 1" BW	1"	64,8	50	33,5	24,3	1
Union weco 206 - 1"1/4 BW	1"1/4	71	57	42,2	32,5	1
Union weco 206 - 1"1/2 BW	1"1/2	75	60	48,3	38,1	1,4
Union weco 206 - 2" BW	2"	82,9	72,5	60,3	49,2	2,6
Union weco 206 - 2"1/2 BW	2"1/2	105	90	73	59	4,1
Union weco 206 - 3" BW	3"	115,2	101,6	88,9	73,7	5,6
Union weco 206 - 4" BW	4"	126,4	117,3	114,3	97,2	7,3
Union weco 206 - 6" BW	6"	159,1	152,3	168,3	146,3	23,3
Union weco 206 - 8" BW	8"	142	183,5	219,1	193,7	33,9
Union weco 206 - 10" BW	10"	141	229	273	242,8	33,8

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.

Type 207

Recommended service :
Seals manifold connections & protects union threads.
Parts interchangeable with Fig 200 & 206.
Main characteristics :
- Max pressure: 2000 PSI STD & H2S service
- Working T: 20°F / 300°F
- Thread: ACME
- End connection: NPT Thread (Butt welding also available)
- Sealing system: O-ring on blanking cap ensures a leak-free seal
- Material: AISI 1040

WECO Wing Unions, type 207 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight (kg)
Union weco 207 - 3" NPT	3"	95	146	104	4,5
Union weco 207 - 4" NPT	4"	109	183	130	7,3
Union weco 207 - 6" NPT	6"	148	252	191	16,8
Union weco 207 - 8" NPT	8"	219	314	243	31,9
Union weco 207 - 10" NPT	10"	246	368	292	43,5

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.

{tab=Type 400

Recommended service :
Manifold and line connections, pump suction, mud services.
Main characteristics :
- Max pressure: 4000 PSI STD & H2S service from 2’’ to 4’’
2500 PSI STD & H2S service from 5’’ to 12’’
- Working T: 20°F / 300°F
- Thread: ACME
- End connection: NPT Thread (Butt welding also available)
- Sealing system: Metal to metal (fire resistance)
- Material: A395 / AISI 1040

WECO Wing Unions, type 400 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight (kg)
Union weco 400 - 2" NPT	2"	133	89	78	5
Union weco 400 - 2"1/2 NPT	2"1/2	154	103	89	7,3
Union weco 400 - 3" NPT	3"	158	111	106	8,6
Union weco 400 - 4" NPT	4"	209	127	133	12,7
Union weco 400 - 5" NPT	5"	266	148	159	21,3
Union weco 400 - 6" NPT	6"	281	171	197	29
Union weco 400 - 8" NPT	8"	291	198	244	43,1
Union weco 400 - 10" NPT	10"	270	244	298	57,2
Union weco 400 - 12" NPT	12"	278	272	356	73,9

All specifications are given as an indication, they may be modified in the interest of our customers.

Note: the operating temperature depends on the type of elastomer used.

Type 602

Recommended service :
Manifold line connections, pump suction & mud services, well test piping lines.
Main characteristics :
- Max pressure: Sch 80 (A350 LF2) 2500 PSI STD & H2S service from 1” to 3”
2300 PSI STD & H2S service for 4”
- Max pressure: Sch XXH (A350 LF2) 5000 PSI STD & H2S service for 3” & 4”
6000 PSI STD & H2S service from 1’’ to 2’’
- Max pressure: Sch XXH (AISI 4130) 6000 PSI STD & H2S service from 1’’ to 4’’
- Working T: - 40°F / 350°F
- Thread: ACME (& ISO for 2” & 3”)
- End connection: Butt welding (NPT Thread also available)
- Sealing system: Seal ring
- Sub Material: A350 LF2 / AISI 4130

General dimension FIG. 602 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight (kg)
Union weco 602 - 1" NPT	1"	90	60	44	1,4
Union weco 602 - 1"1/4 NPT	1"1/4	124	83	65	4,5
Union weco 602 - 1"1/2 NPT	1"1/2	124	83	65	4.1
Union weco 602 - 2" NPT	2"	146	92	78	6,8
Union weco 602 - 3" NPT	3"	159	114	106	9,5
Union weco 602 - 4" NPT	4"	210	132	133	14

General dimension FIG. 200 Butt Welding
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	øID (SCH80)	øID (SCH XXH)	Weight (kg)
Union weco 602 - 1" BW	1"	83	57	33,4	24,3	15,2	1,4
Union weco 602 - 1"1/4 BW	1"1/4	124	83	42,2	32,5	22,8	4,5
Union weco 602 - 1"1/2 BW	1"1/2	119,4	83	65	38,1	28	4,8
Union weco 602 - 2" BW	2"	133	90	60,3	49,2	38,1	5,7
Union weco 602 - 3" BW	3"	145	115	88,9	73,7	58,4	10
Union weco 602 - 4" BW	4"	145	132	114,3	97,2	80,1	13,2

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.

Danger : Avoid the DANGER for interconnecting 2" Fig 602 and Fig 1002 with 2" Fig 1502.

Type 1002

Recommended service :
Cementing, fracturing, acidizing, testing, choke and kill lines, well test piping lines
Main characteristics :
- Max pressure: Sch XXH (A350 LF2) 5000 PSI STD & H2S service for 1” to 6”
- Max pressure: Sch XXH (AISI 4130) 7500 PSI STD service for 5” & 6”
                                                           10000 PSI STD service from 1” to 4”
                                                            5000 PSI H2S service for 5” & 6”
                                                            7500 PSI H2S service from 1” to 4”
- Working T: - 40°F / 350°F
- Thread: ACME
- End connection: Butt welding (NPT Thread also available)
- Sealing system : Seal ring
- Sub Material: A350 LF2 / AISI 4130

General dimension FIG. 1002 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight (kg)
Union weco 1002 - 1" NPT	1"	90	56	44	1,8
Union weco 1002 - 1"1/4 NPT	1"1/4	124	77	65	4,5
Union weco 1002 - 1"1/2 NPT	1"1/2	124	77	65	4,1
Union weco 1002 - 2" NPT	2"	146	97	78	7,3
Union weco 1002 - 2"1/2" NPT	2"1/2"	156	99	89	8,2
Union weco 1002 - 3" NPT	3"	158	115	108	10
Union weco 1002 - 4" NPT	4"	209	126	135	14,5
Union weco 1002 - 5" NPT	5"	-	-	-	-
Union weco 1002 - 6" NPT	6"	-	-	-	-

General dimension FIG. 1002 Butt Welding
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	øID (SCH XXH)	Weight (kg)
Union weco 1002 - 1" BW	1"	89	57	33,4	15,2	1,8
Union weco 1002 - 1"1/4 BW	1"1/4	124	83	42,2	22,8	4,4
Union weco 1002 - 1"1/2 BW	1"1/2	119	83	65	28	4,2
Union weco 1002 - 2" BW	2"	130	96	60,3	38,1	6,6
Union weco 1002 - 2"1/2" BW	2"1/2"	159	99	73	45	9,5
Union weco 1002 - 3" BW	3"	136	117	88,9	58,4	11,1
Union weco 1002 - 4" BW	4"	144	132	114,3	80,1	15,2
Union weco 1002 - 5" BW	5"	155	152	141,3	103,2	27
Union weco 1002 - 6" BW	6"	158	172	168,3	124,4	39

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.

Danger : Avoid the DANGER for interconnecting 2" Fig 602 and Fig 1002 with 2" Fig 1502.

Type 1003

Recommended service :
For high-pressure connections where lines cannot be aligned, stand pipe lines.
Main characteristics :
- Max pressure: Sch XXH 10000 PSI STD service for 2” & 3”
                                          7500 PSI H2S service for 2” & 3”
                                          7500 PSI STD service for 4’’ & 5’’
                                          5000 PSI H2S service for 4’’ & 5’’
- Working T: - 40°F / 350°F
- Thread: ACME
- End connection: Butt welding (NPT Thread also available)
- Sealing system: O-ring on male side
- Sub Material: AISI 4130

WECO Wing Unions, type 1003 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight (kg)
Union weco 1003 - 2" NPT	2"	118	95	76	5,4
Union weco 1003 - 3" NPT	3"	232	124	111	20,4
Union weco 1003 - 4" NPT	4"	278	146	140	33,6
Union weco 1003 - 5" NPT	5"	-	-	-	-

General dimension FIG. 1003 Butt Welding
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	X° max	øOD (mm)	øID (SCH XXH)	Weight (kg)
Union weco 1003 - 2" BW	2"	120	88,9	4	60,3	38,1	6
Union weco 1003 - 3" BW	3"	231,7	123	7,5	88,9	58,4	20,1
Union weco 1003 - 4" BW	4"	277,7	140	7,5	114,3	81,1	36,9
Union weco 1003 - 5" BW	5"	277,7	140	7,5	141,3	103,2	39,4

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.

Type 1502

Recommended service :
Cementing, fracturing, acidizing, testing, and choke and kill lines, well test piping lines.
Main characteristics :
- Max pressure: Sch XXH 15000 PSI STD service 10000 PSI H2S service
- Working T: -40°F / 350°F
- Thread: ACME
- End connection: Butt welding (NPT Thread also available)
- Sealing system: Seal ring
- Sub Material: AISI 4130 (A350 LF2 also available)

General dimension FIG. 1502 - NPT Thread
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	Weight (kg)
Union weco 1502 - 1" NPT	1"	110	73	55	4,1
Union weco 1502 - 1"1/2 NPT	1"1/2	137	93	75	7,7
Union weco 1502 - 2" NPT	2"	178	99	81	8,6
Union weco 1502 - 2"1/2 NPT	2"1/2	184	106	95	10
Union weco 1502 - 3" NPT	3"	194	114	112	13,6
Union weco 1502 - 4" NPT	4"	216	300	146	29
Union weco 1502 - 5" NPT	5"	-	-	-	-

General dimension FIG. 1502 Butt Welding
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	øID (SCH XXH)	Weight (kg)
Union weco 1502 - 1" BW	1"	110,7	68,6	33,4	15,2	3,7
Union weco 1502 - 1"1/2 BW	1"1/2	136,9	92,2	65	28	7,5
Union weco 1502 - 2" BW	2"	160	100	60,3	38,1	9,5
Union weco 1502 - 2"1/2 BW	2"1/2	136	106	73	45	10
Union weco 1502 - 3" BW	3"	134	115	88,9	58,4	13
Union weco 1502 - 4" BW	4"	216	154	114,3	80,1	34
Union weco 1502 - 5" BW	5"	228,6	165	141,3	103,2	43

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.

Danger : Avoid the DANGER for interconnecting 2" Fig 602 and Fig 1002 with 2" Fig 1502.

Type 2002

Recommended service :
Cementing, fracturing, acidizing, testing, and choke-and-kill lines.

Main characteristics :
- Max pressure: 20000 PSI STD service
- Working T: 20°F / 300°F
- Thread: ACME
- End connection: Butt welding
- Sealing system: Seal ring
- Sub Material: AISI 4130

General dimension FIG. 2002 Butt Welding
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	øID (Special SCH)	Weight (kg)
Union weco 2002 - 2" BW	2"	188	95	66	33	9,5
Union weco 2002 - 3" BW	3"	267	155	140	76	21,8

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.

Type 2202

Recommended service :
Cementing, fracturing, acidizing, testing, and choke-and-kill lines.

Main characteristics :
- Max pressure: 15000 PSI H2S service
- Working T: 20°F / 300°F
- Thread: ACME
- End connection: Butt welding
- Sealing system: Seal ring
- Sub Material: AISI 4130

General dimension FIG. 2002 Butt Welding
Part N°	Nominal pipe size (inch)	A (mm)	B (mm)	øOD (mm)	øID (Special SCH)	Weight (kg)
Union weco 2202 - 2" BW	2"	224	95	73	33	10
Union weco 2202 - 3" BW	3"	267	155	140	76	24

All specifications are given as an indication, they may be modified in the interest of our customers.
Note: the operating temperature depends on the type of elastomer used.