www.swagelok.com
We ld F i tti n gs
Ultrahigh-Purity, Specially Cleaned, and Industrial
■ 1/8 to 1 in. and 6 to 18 mm
■ 316, 316L, 316L VAR, and 316L VIM-VAR stainless steel materials
■ Fittings for manual or automatic welding equipment
2
Weld Fittings
Cleaning and Packaging
Contents
Standard
Materials of Construction . . . . . . . . . . . . . . . . . . . . . . . 2
Cleaning and Packaging . . . . . . . . . . . . . . . . . . . . . . . . 2
Pressure Ratings Basis . . . . . . . . . . . . . . . . . . . . . . . . . 3
Micro-Fit® (Miniature Tube Butt Weld) Fittings . . . . . . . 3
Tube Butt Weld Fittings . . . . . . . . . . . . . . . . . . . . . . . . . 6
Automatic Tube Butt Weld Fittings . . . . . . . . . . . . . . . . 9
Automatic Tube Socket Weld Fittings . . . . . . . . . . . . . . 12
Tube Socket Weld Fittings . . . . . . . . . . . . . . . . . . . . . . . 13
Pipe Socket Weld Fittings . . . . . . . . . . . . . . . . . . . . . . . 15
Pipe Butt Weld Fittings . . . . . . . . . . . . . . . . . . . . . . . . . 16
Swagelok® Orbital Welding System . . . . . . . . . . . . . . . 16
Specifications
Bar Stock➀
SS
316L stainless steel
316L
316L VIM-VAR
stainless steel
6LV➁
ASTM A479/ASME SA479
and ASTM A276
SEMI F20‑0305
Ultrahigh-Purity➂
Forgings➃
316 stainless steel
SS
316L stainless steel
316L
Weld fittings are available cleaned and packaged in
accordance with Swagelok Special Cleaning and Packaging
(SC‑11), MS‑06‑63, to ensure compliance with product
cleanliness requirements as stated in ASTM G93 Level C. To
order, add ‑SC11 to the ordering number.
Example: 6LV-4MW-6-2-SC11
Photovoltaic (SC‑06)
Select weld fittings are available cleaned and packaged
in accordance with Swagelok Photovoltaic Process
Specification (SC‑06), MS‑06‑64, to meet the process
requirements of solar cell production. To order, add -SC06 to
the ordering number.
Example: 6LV-4MW-6-2-SC06
Example: 6LV-4MW-6-2-P6
Designator
316 stainless steel
Special (SC‑11)
SC-06–cleaned weld fittings are available with controlled
surface finishes and electropolishing. Wetted surfaces are
finished to an average 5 µin. (0.13 µm) Ra. To order, add -P6
to the ordering number.
Materials of Construction
Material
Weld fittings are cleaned in accordance with Swagelok
Standard Cleaning and Packaging (SC-10), MS-06-62.
ASTM A182/ASME SA182
and ASTM A314
➀ Includes straight configurations and all Micro-Fit weld fittings.
➁Straight Micro-Fit configurations are 316L VAR stainless steel/SEMI
F20‑0305 High-Purity, 20 % minimum elongation allowed.
➂ 20 % minimum elongation allowed.
➃ Includes all elbows, crosses, and tees, excluding Micro-Fit weld fittings.
Additional Considerations
Consult ASME Boiler and Pressure Vessel Code, ASME B31.1,
ASME B31.3, or other applicable codes for information on
weld setup, technique, and additional considerations for
welded systems.
The choice of fitting, pipe, and tubing material being welded
is critical. Using the same materials will ensure the same
coefficients of expansion and will reduce the possibility of
poor welds, out-of-roundness, or dimensional changes that
are detrimental to a good weld.
Threaded End Connections
Pipe threads are based on the requirements of ASME B1.2.0.1
(NPT) and SAE AS71051 (ANPT) for tapered pipe threads.
Ultrahigh-Purity (SC‑01)
Select weld fittings are available with controlled surface
finishes, electropolished, and specially cleaned. Wetted
surfaces are finished to an average 5 µin. (0.13 µm) Ra. For
more information, see Swagelok Ultrahigh-Purity Process
Specification (SC-01), MS-06-61. To order, add -P to the
ordering number.
Example: 6LV-4MW-6-2-P
Cleaning Process Availability
Fitting Type
Micro-Fit (miniature
tube butt weld)
Cleaning Process (Designator)
UltrahighPhotovoltaic
Special
Purity
(-SC11 )
(-SC06)
(-P6)
(-P)
✓
✓
✓
✓
Tube butt weld
✓
✓
✓
✓
Automatic tube
butt weld
✓
✓
✓
✓
Automatic tube
socket weld
✓
Tube socket weld
✓
Pipe socket weld
✓
Pipe butt weld
✓
Oxygen Service Hazards
For more information about hazards and risks of oxygenenriched systems, see the Swagelok Oxygen System Safety
Technical Report, MS‑06‑13.
Weld Fittings
3
Pressure Ratings Basis
Catalog pressure ratings shown are for temperatures from
–20 to 100°F (–28 to 37°C), which are based on an allowable
stress value of 20 000 psi (1378 bar) in accordance with
ASME B31.3 and ASME B31.1 for 316 stainless steel. 316L
stainless steel material is controlled in accordance with
Swagelok material specifications and possesses minimum
room temperature tensile and yield strengths equivalent to
316 stainless steel.
Material Type
316 SS
Temperature, °F (°C)
Pressure derating factors for applications at temperatures
greater than 100°F (37°C) were determined from these
pressure codes and are listed in the table at right.
316L SS
Factor
–20 (–28) to 100 (37)
1.00
1.00
200 (93)
1.00
0.83
400 (204)
0.96
0.77
600 (315)
0.85
0.67
800 (426)
0.79
0.62
1000 (537)
0.76
0.56
Examples:
Elevated-Temperature Factors
A 1/4 in. 316L VIM-VAR reducing union has a pressure rating
of 5100 psig (351 bar), as shown in the table below. To obtain
the pressure rating at 400°F (204°C), multiply 5100 psig
(351 bar) by 0.77:
5100 psig (351 bar)  0.77 = 3927 psig (270 bar)
To determine elevated-temperature pressure ratings in
accordance with B31.3 and B31.1, multiply the pressure
ratings provided in the ordering number tables on the pages
that follow by the factors in the table at right.
A 1/4 in. 316 SS tube socket weld union has a pressure rating
of 10 700 psig (737 bar), as shown in the table on page 13.
To obtain the pressure rating at 400°F (204°C), multiply
10 700 psig (737 bar) by 0.96:
10 700 psig (737 bar) 0.96 = 10 272 psig (707 bar)
Alternative elevated-temperature factors may be chosen from
ASME B31.3 or B31.1 at the user’s discretion.
Micro-Fit (Miniature Tube Butt Weld) Fittings
Compact Design
■ Accommodates
■ Allows
Rounded body block helps prevent
damage to other components during
system fabrication or maintenance.
tubing systems requiring miniaturization
close component spacing
■ Provides
Marking identifies
manufacturer, material,
and, when applicable,
ultrahigh-purity
cleaning.
flow and service ratings equal to larger weld
fittings.
Material heat code
is roll stamped to
ensure raw material
traceability.
Ordering Information and Dimensions
■ Dimensions are for reference only and are subject to
change.
Ultrahigh-purity cleaning
with average 5 µin. (0.13 µm) Ra
surface finish is available. Standard
surface finish is average 10 µin.
(0.25 µm) Ra.
■ See Cleaning and Packaging, page 2, to order Micro-
Fit weld fittings cleaned in accordance with Swagelok
Special Cleaning and Packaging (SC-11), MS‑06‑63;
Photovoltaic Process Specification (SC‑06), MS‑06‑64; or
Ultrahigh-Purity Process Specification (SC-01), MS-06-61.
Reducing Union
B
B1
A
Square, sharp, burrfree tube weld ends
enhance alignment,
maintain tube wall
uniformity, and promote
weld repeatability.
Ordering
Number
Radiused junction
allows for a smooth
flow transition and
eliminates pockets
and entrapment
zones.
Dimensions
Tube
OD
Wall
Thickness
Tube
OD
Wall
Thickness
1/4
0.035
1/8
0.028
6LV-4MW-6-2
3/8
0.035
1/4
0.035
6LV-6MW-6-4
0.75
0.42
0.25
3300 (227)
6LV-8MW-6-4
(19.0)
(10.7)
(6.4)
3700 (254)
A
B
B1
Dimensions, in. (mm)
1/2
0.049
1/4
3/8
0.035
6LV-8MW-6-6
Pressure
Rating
psig (bar)
5100 (351)
3300 (227)
4
Weld Fittings
Micro-Fit (Miniature Tube Butt Weld) Fittings
90° Union Elbow
L
B
A
F flat
L
Dimensions
Tube
OD
Wall
Thickness
Ordering
Number
1/8
0.028
6LV-2MW-9
1/4
0.035
6LV-4MW-9
3/8
0.035
6LV-6MW-9
0.69 (17.5)
1/2
0.049
6LV-8MW-9
0.81 (20.6)
A
B
F
Pressure
Rating
L
Dimensions, in. (mm)
psig (bar)
0.56 (14.2)
0.25 (6.4)
5/16
0.41 (10.4) 8500 (585)
5/16
0.41 (10.4) 5100 (351)
7/16
0.47 (11.9) 3300 (227)
9/16
0.53 (13.5) 3700 (254)
(5/16)
10.4 (0.41) 420 (6095)
(7/16)
11.9 (0.47) 310 (4499)
(7/16)
11.9 (0.47) 240 (3483)
(9/16)
13.5 (0.53) 200 (2902)
Dimensions, mm (in.)
6
8
10
6LV-6MMW-9
1.0
12
Reducing 90°
Union Elbow
Tube
OD
Wall
Thickness
6LV-8MMW-9
17.5 (0.69)
6LV-10MMW-9
17.5 (0.69)
6LV-12MMW-9
20.6 (0.81)
Tube
OD
Wall
Thickness
A
6.4 (0.25)
Dimensions
Ordering
Number
A
3/8
0.035
1/4
0.035
0.049
A
0.81
6
10
6
17.5
17.5
(0.69)
1.0
8
Tube
OD
A
L1
9/16
Wall
Thickness
1/4
(7/16)
6.4
20.6
(9/16)
(0.81)
6LV-12MMW-9-8M
A
A1
(20.6)
0.035
0.53
(254)
3300
11.9
bar (psig)
310
(0.47)
(4499)
11.9
240
(0.47)
(3483)
13.5
200
(0.53)
(2902)
B
B1
F
L
L1
Pressure
Rating
psig (bar)
0.45
0.61
(11.4)
0.41
0.50
(10.4)
(12.7)
5/16
(15.5)
0.66
(16.8)
6LV-4MW-9-03444
0.76 (19.3)
0.45 (11.4)
0.61 (15.5)
6LV-4MW-9-03445
0.81 (20.6)
0.50 (12.7)
0.66 (16.8)
B1
45° Union Elbow
Dimensions
Tube
OD
Wall
Thickness
Ordering
Number
1/4
0.035
6LV-4MW-5
3/8
0.035
6LV-6MW-5
0.56 (14.2)
1/2
0.049
6LV-8MW-5
0.64 (16.3)
A
B
F
Dimensions, in. (mm)
0.47 (11.9)
0.25 (6.4)
(227)
(13.5)
Dimensions
Ordering
Number
Dimensions, in. (mm)
0.76
6LV-4MW-9-03442
0.56 (19.3) 0.25
(14.2)
(6.4)
0.81
6LV-4MW-9-03443
A1
(11.9)
(0.25)
6LV-12MMW-9-6M
12
F flat
psig (bar)
3300
3700
(7/16)
(0.69)
6LV-10MMW-9-6M
6
B
0.47
(227)
6LV-8MMW-9-6M
1.0
A
L
Pressure
Rating
Dimensions, mm (in.)
8
Extended Leg
90° Union Elbow
(6.4)
(20.6)
6LV-8MW-9-6
B
F flat
F flat
L
0.25
6LV-8MW-9-4
3/8
7/16
(17.5)
0.035
L
B
F
0.69
6LV-6MW-9-4
1/4
1/2
L
B
Dimensions, in. (mm)
L
B
bar (psig)
14.2 (0.56)
L
Pressure
Rating
psig (bar)
5/16
0.41 (10.4) 5100 (351)
7/16
0.47 (11.9) 3300 (227)
9/16
0.53 (13.5) 3700 (254)
5100
(351)
Weld Fittings
5
Micro-Fit (Miniature Tube Butt Weld) Fittings
Union Tee
A
L
F flat
Dimensions
Tube
OD
Wall
Thickness
Ordering
Number
1/8
0.028
6LV-2MW-3
1/4
0.035
6LV-4MW-3
3/8
0.035
6LV-6MW-3
0.94 (23.9)
1/2
0.049
6LV-8MW-3
1.06 (26.9)
B
A
B
F
Pressure
Rating
L
Dimensions, in. (mm)
L
psig (bar)
0.82 (20.8)
0.25 (6.4)
5/16
0.41 (10.4) 8500 (585)
5/16
0.41 (10.4) 5100 (351)
7/16
0.47 (11.9) 3300 (227)
9/16
0.53 (13.5) 3700 (254)
(5/16)
10.4 (0.41) 420 (6095)
(7/16)
11.9 (0.47) 310 (4499)
(7/16)
11.9 (0.47) 240 (3483)
(9/16)
13.5 (0.53) 200 (2902)
Dimensions, mm (in.)
6
8
1.0
10
12
Extended Branch Leg
Union Tee
B
L
Tube
OD
A
B1
L1
0.035
B
23.9 (0.94)
23.9 (0.94)
6LV-12MMW-3
26.9 (1.06)
Ordering
Number
6.4 (0.25)
Dimensions
A
A1
B
Dimensions, in. (mm)
0.82 0.76 0.25
6LV-4MW-3-03446
(20.8)
Tube
Wall
OD Thickness
A
L1
B1
F flat
6LV-8MMW-3
6LV-10MMW-3
bar (psig)
B1
0.45
(19.3)
(6.4)
(11.4)
A
A1
B
1/4
A1
0.035
Ordering
Number
F flat
L
Dimensions, in. (mm)
1.96 0.56 0.83
6LV-4MW-3-03921
(49.8) (14.2) (21.1)
Pressure
Rating
0.41
0.61
psig (bar)
5100
5/16
(10.4)
(15.5)
(351)
B1
L
L1
Pressure
Rating
0.98
0.41
psig (bar)
5100
F
0.25
(6.4)
5/16
(24.9) (10.4)
B
Ordering
Number
Dimensions
A
B
F
L
Pressure
Rating
0.47
psig (bar)
3300
Dimensions, in. (mm)
L
0.035
1/4
1/4
1/2
(351)
There may be a slight mismatch between run ends at drill intersection.
Tube
Wall
Tube
Wall
OD Thickness OD Thickness
3/8
B
L1
Dimensions
Reducing Tee
A
L
F
A1
Extended Run Leg Union Tee
L
20.8 (0.82)
Wall
Thickness
1/4
F flat
6LV-6MMW-3
6LV-6MW-3-6-4
0.035
6LV-8MW-3-8-4
0.049
3/8
6LV-8MW-3-8-6
0.94
7/16
(23.9)
(11.9)
0.25
1.06
(6.4)
(26.9)
9/16
0.53
(254)
(13.5)
3300
11.9
bar (psig)
240
(0.47)
(3483)
(227)
Dimensions, mm (in.)
10
6
1.0
6
6LV-10MMW-3-10M-6M
1.0
6LV-12MMW-3-12M-6M
12
8
6LV-12MMW-3-12M-8M
(227)
3700
23.9
(7/16)
(0.94)
6.4
26.9
(1.06)
(0.25)
(9/16)
13.5
200
(0.53)
(2902)
6
Weld Fittings
Micro-Fit (Miniature Tube Butt Weld) Fittings
Union Cross
A
Tube
OD
Wall
Thickness
1/8
0.028
6LV-2MW-4
1/4
0.035
6LV-4MW-4
A
B
F
Pressure
Rating
L
Dimensions, in. (mm)
F flat
L
Dimensions
Ordering
Number
B
psig (bar)
5/16
0.41 (10.4) 8500 (585)
5/16
0.41 (10.4) 5100 (351)
7/16
0.47 (11.9) 3300 (227)
9/16
0.53 (13.5) 3700 (254)
(5/16)
10.4 (0.41) 420 (6095)
(7/16)
11.9 (0.47) 310 (4499)
(7/16)
11.9 (0.47) 240 (3483)
(9/16)
13.5 (0.53) 200 (2902)
0.82 (20.8)
3/8
0.035
6LV-6MW-4
0.94 (23.9)
1/2
0.049
6LV-8MW-4
1.06 (26.9)
0.25 (6.4)
Dimensions, mm (in.)
6
6LV-6MMW-4
8
6LV-8MMW-4
1.0
10
Tribow
Tube
OD
6LV-12MMW-4
26.9 (1.06)
Wall
Thickness
Ordering
Number
B
L
1/4
F
flat
0.035
3/8
A
0.035
1/2
This unique design has weld ends in three
planes at 90° to each other. It permits greater
flexibility in designing systems, especially
where space is limited.
23.9 (0.94)
6LV-10MMW-4
12
0.049
6
1.0
bar (psig)
20.6 (0.81)
6.4 (0.25)
Dimensions
A
B
F
Dimensions, in. (mm)
0.56
6LV-4MW-91
5/16
(14.2)
6LV-6MW-91
6LV-8MW-91
0.69
0.25
(17.5)
(6.4)
0.81
7/16
9/16
(20.6)
Dimensions, mm (in.)
14.2
6LV-6MMW-91
6.4
(0.56)
(0.25)
(5/16)
L
Pressure
Rating
0.41
psig (bar)
5100
(10.4)
(351)
0.47
3300
(11.9)
(227)
0.53
3700
(13.5)
(254)
10.4
bar (psig)
420
(0.41)
(6095)
Tube ends are machined with
a square face and corners
to enhance alignment and
maintain tube wall uniformity.
Tube Butt Weld Fittings
Ordering Information and Dimensions
■ Dimensions are for reference only and are subject to
change.
■ See Cleaning and Packaging, page 2, to order tube
butt weld fittings cleaned in accordance with Swagelok
Special Cleaning and Packaging (SC-11), MS‑06‑63;
Photovoltaic Process Specification (SC‑06), MS‑06‑64; or
Ultrahigh-Purity Process Specification (SC-01), MS-06-61.
90° Union Elbow
B
L
Tube
OD
Wall
Thickness
1/4
0.035
316L-4TB7-9
3/8
0.035
316L-6TB7-9
1/2
0.049
316L-8TB7-9
3/4
0.049
316L-12TB7-9
1.0
316L-6MTB7-9
F flat
L
Standard surface finish is
average 10 µin. (0.25 µm)
Ra. Controlled surface
finish is available for
ultrahigh-purity systems.
Ordering
Number
Dimensions
B
F
Dimensions, in. (mm)
0.75 (19.0)
8
1.0
316L-8MTB7-9
10
1.0
316L-10MTB7-9
12
1.0
18
1.5
L
Pressure
Rating
psig (bar)
7/16
1.23 (31.2) 5100 (351)
7/16
1.20 (30.5) 3300 (227)
11/16
1.34 (34.0) 3700 (254)
15/16
1.46 (37.1) 2400 (165)
(7/16)
31.2 (1.23) 420 (6095)
Dimensions, mm (in.)
6
Precisely finished diameter
matches tube diameter.
bar (psig)
(7/16)
31.2 (1.23) 310 (4499)
(11/16)
34.0 (1.34) 240 (3483)
316L-12MTB7-9
(11/16)
34.0 (1.34) 200 (2902)
316L-18MTB7-9
(15/16)
37.6 (1.48) 200 (2902)
19.0 (0.75)
Weld Fittings
Tube Butt Weld Fittings
Reducing Union
B
A
Tube
OD
Wall
Thickness
Tube
OD
Wall
Thickness
3/8
0.035
1/4
0.035
1/2
0.049
3/4
0.049
Dimensions
Ordering
Number
A
B
Dimensions, in. (mm)
B
1
0.065
1/4
3/8
1/2
1/2
3/4
0.035
0.049
0.049
psig (bar)
316L-6TB7-6-4
3300 (227)
316L-8TB7-6-4
3700 (254)
316L-8TB7-6-6
1.50
0.75
3300 (227)
316L-12TB7-6-8
(38.1)
(19.0)
2400 (165)
316L-16TB7-6-8
2400 (165)
316L-16TB7-6-12
Dimensions, mm (in.)
10
1.0
6
8
1.0
6
12
1.0
8
10
Union Tee
L
F flat
L
A
B
6
240 (3483)
316L-10MTB7-6-8M
316L-12MTB7-6-8M
316L-12MTB7-6-10M
1.0
1.5
Tube
OD
Wall
Thickness
1/4
0.035
316L-4TB7-3
2.46 (62.5)
3/8
0.035
316L-6TB7-3
2.40 (61.0)
Ordering
Number
38.1
19.0
(1.50)
(0.75)
316L-18MTB7-6-6M
18
12
bar (psig)
316L-10MTB7-6-6M
316L-12MTB7-6-6M
1.0
Dimensions
A
B
1/2
0.049
316L-8TB7-3
2.68 (68.1)
3/4
0.049
316L-12TB7-3
2.91 (73.9)
F
316L-6MTB7-3
8
1.0
316L-8MTB7-3
62.5 (2.46)
1.0
316L-10MTB7-3
67.8 (2.67)
12
1.0
316L-12MTB7-3
67.8 (2.67)
18
1.5
316L-18MTB7-3
74.9 (2.95)
Pressure
Rating
psig (bar)
1.23 (31.2) 5100 (351)
0.75
7/16
1.20 (30.5) 3300 (227)
(19.0)
11/16
1.34 (34.0) 3700 (254)
15/16
1.46 (37.1) 2400 (165)
(7/16)
31.2 (1.23) 420 (6095)
bar (psig)
62.5 (2.46)
10
L
7/16
Dimensions, mm (in.)
1.0
200 (2902)
200 (2902)
316L-18MTB7-6-12M
Dimensions, in. (mm)
6
Pressure
Rating
19.0
(0.75)
(7/16)
31.2 (1.23) 310 (4499)
(11/16)
34.0 (1.34) 240 (3483)
(11/16)
34.0 (1.34) 200 (2902)
(15/16)
37.6 (1.48) 200 (2902)
7
8
Weld Fittings
Tube Butt Weld Fittings
Reducing Tee
L
F flat
Tube
Wall
Tube
Wall
OD Thickness OD Thickness
A
Dimensions
Ordering
Number
A
B
F
L
L1
Pressure
Rating
1.20
1.23
psig (bar)
3300
Dimensions, in. (mm)
B
3/8
0.035
1/4
316L-6TB7-3-6-4
1/4
L1
1/2
3/8
316L-8TB7-3-8-4
0.035
3/8
2.67
(67.8)
316L-8TB7-3-8-6
0.75
11/16
(30.5) (31.2)
(227)
1.34
3700
1.34 (34.0)
1.35
3300
(34.3)
(227)
(34.0)
(19.0)
316L-12TB7-3-12-6
2.91
15/16
(73.9)
316L-12TB7-3-12-4
1.46 (34.3)
1.48
(37.1)
6
316L-8MTB7-3-8M-6M
6
316L-10MTB7-3-10M-6M
62.2
8
1.0
(2.67)
316L-12MTB7-3-12M-6M
8
316L-12MTB7-3-12M-8M
L
A
Tube
OD
Wall
Thickness
1/4
0.035
Ordering
Number
19.0
67.8
F flat
B
B
F
L
7/16
1.23 (31.2) 5100 (351)
0.035
316L-6TB7-4
2.39 (60.7) 0.75 (19.0)
7/16
1.20 (30.5) 3300 (227)
0.049
316L-8TB7-4
2.61 (66.3) 0.75 (19.0)
11/16
1.34 (34.0) 3700 (254)
(7/16)
31.3 (1.23) 420 (6095)
(7/16)
31.3 (1.23) 310 (4499)
(5/8)
34.0 (1.34) 240 (3483)
(5/8)
34.0 (1.34) 200 (2902)
8
1.0
ATW Weld Ring
ATW weld rings are used with tube butt
weld fittings. The ring helps align weld
joints and adds material to the weld
zone during manual or orbital welding.
62.2 (2.45)
316L-8MTB7-4
62.2 (2.45)
bar (psig)
19.0 (0.75)
316L-12MTB7-4 64.8 (2.55)
Tube
OD
1/4
3/8
1/2
N
316L-6MTB7-4
316L-10MTB7-4 64.8 (2.55)
12
M typical
Pressure
Rating
3/8
10
Tx
34.0 (1.34)
psig (bar)
2.45 (62.2) 0.75 (19.0)
Dimensions, mm (in.)
E
34.0 (1.34)
1/2
6
L
Ordering
Number
Dimensions
E
M
N
Dimensions, in. (mm)
0.20
316L-4-ATW-R
316L-8-ATW-R
Tx
0.28
(5.1)
316L-6-ATW-R
bar (psig)
310
(4499)
(7.1)
0.32
0.02
0.01
0.41
(8.1)
(0.51)
(0.25)
(10.4)
0.42
0.54
(10.7)
(13.7)
(3483)
200
(2902)
(11/16)
(2.67)
Dimensions, in. (mm)
316L-4TB7-4
(11/16)
Dimensions
A
31.3 (1.23)
(0.75)
12
Union Cross
(165)
240
67.8
316L-10MTB7-3-10M-8M
6
(7/16)
(2.45)
10
1.0
2400
(37.6)
Dimensions, mm (in.)
8
(254)
1.35
0.049
1/4
7/16
(60.7)
0.049
B
3/4
2.39
200
(2902)
Weld Fittings
Automatic Tube Butt Weld Fittings
9
Precisely finished diameter
matches tube diameter.
Ordering Information and Dimensions
■ Dimensions are for reference only and are subject to
change.
Standard surface finish is
average 10 µin. (0.25 µm)
Ra. Controlled surface
finish is available for
ultrahigh-purity systems.
■ See Cleaning and Packaging, page 2, to order
automatic tube butt weld fittings cleaned in accordance
with Swagelok Special Cleaning and Packaging (SC‑11),
MS‑06‑63; Photovoltaic Process Specification (SC‑06),
MS‑06‑64; or Ultrahigh-Purity Process Specification
(SC‑01), MS-06-61.
Locator Union
A
Tube
OD
B
1/4
3/8
F
Union
A
Dimensions
Ordering
Number
A
B
Dimensions, in. (mm)
1.69
316L-4-ATW-6L
D
Tx
D
Wall
Thickness
Integral filler ring aids in alignment.
0.035
(42.9)
0.035
316L-6-ATW-6L
316L-8-ATW-6L
D
F
Tx
Pressure
Rating
0.02
0.36
0.29
psig (bar)
5100
(0.51)
(9.1)
(7.4)
(351)
1.71
0.75
0.03
0.42
0.41
3300
(43.4)
(19.0)
(0.76)
(10.7)
(10.4)
(227)
1.73
0.04
0.60
0.55
3700
(43.9)
(1.0)
(15.2)
(14.0)
(254)
1/2
0.049
Tube
OD
Wall
Thickness
1/4
0.035
316L-4-ATW-6
1.00(25.4) 0.02(0.51) 0.29(7.4)
3/8
0.035
316L-6-ATW-6
1.00(25.4) 0.03(0.76) 0.41(10.4) 3300(227)
1/2
0.049
316L-8-ATW-6
1.00(25.4) 0.04(1.0)
0.55(14.0) 3700(254)
3/4
0.049
316L-12-ATW-6
1.00(25.4) 0.04(1.0)
0.80(20.3) 2400(165)
1
0.065
316L-16-ATW-6
1.25(31.8) 0.04(1.0)
1.06(26.9) 2400(165)
Dimensions
Ordering
Number
A
D
Pressure
Rating
Tx
Dimensions, in. (mm)
Tx
psig (bar)
5100(351)
Dimensions, mm (in.)
Reducing Union
A
D
Tx
B
1.0
316L-6-MATW-6
0.51(0.02) 6.9 (0.27)
420 (6095)
8
1.0
316L-8-MATW-6
0.76(0.03) 8.9 (0.35)
310 (4499)
10
1.0
316L-10-MATW-6
0.76(0.03) 10.9 (0.43)
240 (3483)
12
1.0
316L-12-MATW-6
1.0 (0.04) 13.2 (0.52)
200 (2902)
18
1.5
316L-18-MATW-6
1.0 (0.04) 19.3 (0.76)
200 (2902)
Tube
Wall
Tube
Wall
OD Thickness OD Thickness
D1
Tx1
bar (psig)
6
31.8 (1.25)
Ordering
Number
Dimensions
Tx1
Pressure
Rating
1.58 0.75 0.03 0.02 0.41 0.29
psig (bar)
3300
A
B
D
D1
Tx
Dimensions, in. (mm)
3/8
0.035
1/4
0.035
1/4
1/2
0.049
316L-8-ATW-6-4
0.035
3/8
3/4
0.049
316L-6-ATW-6-4
1/2
316L-8-ATW-6-6
0.049
316L-12-ATW-6-8
(40.1) (19.0) (0.76) (0.51) (10.4)
(7.4)
(227)
0.29
3700
1.58 0.75 0.04 (0.51) 0.55 (7.4)
(1.0) 0.03 (14.0) 0.41
3300
0.02
(40.1) (19.0)
(0.76)
(10.4)
(227)
1.62 0.75 0.04 0.04 0.80 0.55
2400
(41.1) (19.0)
(1.0)
(1.0)
(20.3) (14.0)
Dimensions, mm (in.)
8
6
1.0
6
316L-8-MATW-6-6M
1.0
316L-12-MATW-6-6M
12
8
316L-12-MATW-6-8M
(254)
39.9
0.76 0.51
(1.57)
(0.03) (0.02) (0.35) (0.27)
40.1 19.0
(1.58) (0.75)
40.4
(1.59)
0.51
8.9
6.8
(165)
bar (psig)
310
(4499)
6.8
1.0 (0.02) 13.2 (0.27)
(0.04) 0.76 (0.52) 8.9
(0.03)
(0.35)
200
(2902)
10
Weld Fittings
Automatic Tube Butt Weld Fittings
Swagelok Tube Fitting
to Automatic Tube
Weld Connector
Tube
OD
A
D
1/4
D1
B
3/8
Tx
1/2
90° Union Elbow
D
B
Tube
OD
L
Tube
OD
Wall
Thickness
1/4
0.035
3/8
0.035
1/2
0.049
Wall
Thickness
1/4
0.035
3/8
L
0.035
1/2
316L-8-ATW-6-810
316L-12-ATW-9
0.065
316L-16-ATW-9
D1
Tx
Pressure
Rating
0.60
0.02
0.29
psig (bar)
5100
(15.2)
(0.51)
(7.4)
(351)
1.84
0.75
0.66
0.03
0.41
3300
(46.7)
(19.0)
(16.8)
(0.76)
(10.4)
(227)
1.99
0.90
0.04
0.55
3700
(50.5)
(22.9)
(1.0)
(14.0)
(254)
Dimensions
Ordering
Number
316L-8-ATW-9
0.049
1
(44.2)
316L-6-ATW-6-600
D
B
Dimensions, in. (mm)
1.74
316L-4-ATW-6-400
316L-6-ATW-9
0.049
3/4
A
B
D
Dimensions, in. (mm)
0.02
0.75
316L-4-ATW-9
F flat
Tx
Dimensions
Ordering
Number
(19.0)
(0.51)
0.75
0.03
(19.0)
(0.76)
0.75
0.04
(19.0)
(1.0)
0.75
0.04
(19.0)
(1.0)
0.96
0.04
(24.4)
(1.0)
L
Tx
Pressure
Rating
1.25
0.29
psig (bar)
5100
F
7/16
7/16
11/16
15/16
1 1/4
(31.8)
(7.4)
(351)
1.23
0.41
3300
(31.2)
(10.4)
(227)
1.38
0.55
3700
(35.1)
(14.0)
(254)
1.50
0.80
2400
(38.1)
(20.3)
(165)
1.89
1.06
2400
(48.0)
(26.9)
(165)
Dimensions, mm (in.)
6
1.0
316L-8-MATW-9
10
1.0
316L-10-MATW-9
12
1.0
316L-12-MATW-9
18
1.5
316L-18-MATW-9
Tube
OD
A
Tx
L
Wall
Thickness
D
B
0.51
316L-6-MATW-9
8
Union Tee
L
F flat
1.0
(0.02)
0.76
(0.03)
19.0
0.76
(0.75)
(0.03)
Ordering
Number
1.0
(0.04)
1.0
(0.04)
(7/16)
(7/16)
(11/16)
(11/16)
(15/16)
B
1/4
0.035
3/8
0.035
316L-6-ATW-3
1/2
0.049
316L-8-ATW-3
3/4
0.049
316L-12-ATW-3
1
0.065
316L-16-ATW-3
1.0
1.0
316L-8-MATW-3
10
1.0
316L-10-MATW-3
12
1.0
316L-12-MATW-3
18
1.5
316L-18-MATW-3
(0.27)
(5100)
32.0
8.9
227
(1.26)
(0.35)
(3300)
34.8
10.9
254
(1.37)
(0.43)
(3700)
35.1
13.2
199
(1.38)
(0.52)
(2888)
38.6
19.3
206
(1.52)
(0.76)
(2989)
D
0.02
(63.5)
(19.0)
(0.51)
2.46
0.75
0.03
(62.5)
(19.0)
(0.76)
2.76
0.75
0.04
(70.1)
(19.0)
(1.0)
3.00
0.75
0.04
(76.2)
(19.0)
(1.0)
3.78
0.96
0.04
(96.0)
(24.4)
(1.0)
Dimensions, mm (in.)
63.5
316L-6-MATW-3
8
6.9
(1.25)
Dimensions
A
Dimensions, in. (mm)
0.75
2.50
316L-4-ATW-3
6
31.8
bar (psig)
351
0.51
(2.50)
(0.02)
64.0
0.76
(2.52)
(0.03)
69.6
19.0
0.76
(2.74)
(0.75)
(0.03)
70.1
1.0
(2.76)
(0.04)
77.2
1.0
(3.04)
(0.04)
F
7/16
7/16
11/16
15/16
1 1/4
(7/16)
(7/16)
(11/16)
(11/16)
(15/16)
L
Tx
Pressure
Rating
1.25
0.29
psig (bar)
5100
(31.8)
(7.4)
(351)
1.23
0.41
3300
(31.2)
(10.4)
(227)
1.38
0.55
3500
(35.1)
(14.0)
(241)
1.50
0.80
2400
(38.1)
(20.3)
(165)
1.89
1.06
2400
(48.0)
(26.9)
(165)
31.8
6.9
bar (psig)
454
(1.25)
(0.27)
(6589)
32.0
8.9
323
(1.26)
(0.35)
(4687)
34.8
10.9
254
(1.37)
(0.43)
(3686)
35.1
13.2
206
(1.38)
(0.52)
(2989)
38.6
19.3
206
(1.52)
(0.76)
(2989)
Weld Fittings
11
Automatic Tube Butt Weld Fittings
Reducing Tee
A
F flat
L
D
B
Tx
K
B
D1
Tube
OD
Wall
Tube
Wall
Thickness OD Thickness
3/8
0.035
1/4
Dimensions
Ordering
Number
A
(62.5)
0.035
316L-8-ATW-3-8-4
0.035
3/8
3/4
12
1.0
6
B
L
K
1/4
0.035
3/8
L
1/2
Tx1
Pressure
Rating
1.25
1.23
0.41
0.29
psig (bar)
3300
(7.4)
(227)
0.29
3700
(35.1) 1.38 0.55 (7.4)
0.04 (0.51)
11/16
(1.0) 0.03
1.37 (35.1) (14.0) 0.41
3300
(34.8)
(10.4)
(11/16)
34.5
35.1
13.2
6.9
(1.36) (1.38) (0.52) (0.27)
Dimensions
A
316L-8-ATW-3-8TB7-8A
2.43
(227)
2400
(165)
(14.0)
0.51 (0.02)
Ordering
Number
(254)
0.41
(1.0)
316L-6-ATW-3-6TB7-6A
0.049
Tx
1.38
B
D
(63.0)
0.035
L
(31.8) (31.2) (10.4)
Dimensions, in. (mm)
2.48
316L-4-ATW-3-4TB7-4A
B
7/16
K
0.04 (0.76)
1.50 1.50 0.80 (10.4)
15/16
(1.0) 0.04
(38.1) (38.1) (20.3) 0.55
3.00
(2.76) (0.75)
Tube
Wall
OD Thickness
F
0.02
(0.76)
Dimensions, mm (in.)
70.1 19.0
316L-12-MATW-3-12M6M
Manifold Tee
A
0.75
(76.2)
316L-12-ATW-3-12-8
1.0
F
0.03
316L-12-ATW-3-12-6
0.049
0.03
(19.0)
0.049
1/2
D1
(0.76) (0.51)
2.76
(70.1)
316L-8-ATW-3-8-6
0.035
D
0.02
0.049
3/8
B
Dimensions, in. (mm)
2.46
316L-6-ATW-3-6-4
0.035
1/4
1/2
D
Tx1
0.75
0.02
(0.51)
0.03
(61.7) (19.0) (0.76)
2.72
0.04
(69.1)
(1.0)
F
7/16
11/16
11/16
bar (psig)
200
(2902)
K
L
Tx
Pressure
Rating
1.23
1.25
0.29
psig (bar)
5100
(31.2) (31.8)
(7.4)
(351)
1.23
0.41
3300
1.20
(30.5) (31.2) (10.4)
(227)
1.38
0.55
3700
(34.0) (35.1) (14.0)
(254)
1.34
Tx
Reducing Tee
A
F flat
L
B
D
Tx
K
B
Tube
OD
Wall
Thickness
Tube
OD
3/8
0.035
1/4
1/4
1/2
Wall
Thickness
Ordering
Number
B
Dimensions, in. (mm)
2.46
316L-6-ATW-3-6A-4TB7
0.035
316L-8-ATW-3-8A-4TB7
0.049
3/8
Dimensions
A
316L-8-ATW-3-8A-6TB7
D
0.03
(62.5)
(0.76)
F
7/16
0.75
2.76
(70.1)
(19.0)
K
L
Tx
Pressure
Rating
1.23
1.23
0.41
psig (bar)
3300
(31.2)
(31.2)
(10.4)
0.04
(1.0)
11/16
(227)
3700
1.36
(34.5)
1.38
0.55
(254)
1.35
(35.1)
(14.0)
3300
(34.3)
(227)
12
Weld Fittings
Automatic Tube Butt Weld Fittings
Union Cross
Tube
OD
A
L
1/4
F flat
D
B
Tx
3/8
1/2
Wall
Thickness
0.035
0.035
0.049
L
6
1.0
8
Dimensions
Ordering
Number
A
B
D
Dimensions, in. (mm)
2.50
316L-4-ATW-4
0.02
(63.5)
316L-6-ATW-4
316L-8-ATW-4
7/16
(0.51)
2.46
0.75
0.03
(62.5)
(19.0)
(0.76)
2.70
0.04
(68.6)
(1.0)
Dimensions, mm (in.)
63.5
316L-6-MATW-4
(2.50)
19.0
(0.75)
64.0
316L-8-MATW-4
L
Tx
Pressure
Rating
1.25
0.29
psig (bar)
5100
F
7/16
5/8
(31.8)
(7.4)
(351)
1.23
0.41
3300
(31.2)
(10.4)
(227)
1.35
0.55
3700
(34.3)
(14.0)
(254)
6.9
bar (psig)
420
31.8
(0.27)
(6095)
(1.25)
8.9
310
(0.35)
(4499)
0.51
(0.02)
(7/16)
0.76
(2.52)
(0.03)
Automatic Tube Socket Weld Fittings
Thin wall reduces
weld heat input.
Ordering Information and Dimensions
■ Dimensions are for reference only and are subject to
change.
■ See Cleaning and Packaging, page 2, to order
automatic tube socket weld fittings cleaned in accordance
with Swagelok Special Cleaning and Packaging (SC-11),
MS‑06‑63.
Precise machining of socket
ensures proper tube fit.
Union
Tube
OD
A
1/4
D
Union Tee
A
B
A
D
E
Tx
Pressure
Rating
0.19 (4.8)
0.38 (9.7)
6800 (468)
0.50 (12.7) 4900 (337)
Dimensions, in. (mm)
Tx
E
Dimensions
Ordering
Number
316L-4-ASW-6
3/8
316L-6-ASW-6
1.00
0.31 (7.9)
0.28 (7.1)
1/2
316L-8-ASW-6
(25.4)
0.38 (9.7)
0.41 (10.4) 0.63 (16.0) 3800 (261)
3/4
316L-12-ASW-6
Tube
OD
Ordering
Number
L
F flat
1/4
Tx E
D
L
psig (bar)
0.28 (7.1)
3/8
1/2
3/4
316L-4-ASW-3
316L-6-ASW-3
316L-8-ASW-3
316L-12-ASW-3
0.44 (11.2) 0.63 (16.0) 0.88 (22.4) 2700 (186)
Dimensions
A
B
D
E
Dimensions, in. (mm)
0.28
2.46
0.19
(62.5)
(7.1)
(4.8)
2.68
0.31
0.28
(68.1)
0.75
(7.9)
(7.1)
2.68
(19.0)
0.38
0.41
(68.1)
(9.7)
(10.4)
2.94
0.44
0.63
(74.7)
(11.2)
(16.0)
F
7/16
11/16
11/16
15/16
L
Tx
Pressure
Rating
1.23
0.38
psig (bar)
6800
(31.2)
(9.7)
(468)
1.34
0.50
4900
(34.0)
(12.7)
(337)
1.34
0.63
3800
(34.0)
(16.0)
(261)
1.47
0.88
2700
(37.3)
(22.4)
(186)
Weld Fittings
13
Tube Socket Weld Fittings
Ordering Information and Dimensions
■ Dimensions are for reference only and are subject to
change.
■ See Cleaning and Packaging, page 2, to order
automatic tube socket weld fittings cleaned in accordance
with Swagelok Special Cleaning and Packaging (SC-11),
MS‑06‑63.
Union
D
D
Tube
Socket
Size
Precise machining of socket
ensures proper tube fit.
Dimensions
Ordering
Number
A
D
E
Tx
Dimensions, in. (mm)
Tx E
A
Male Connector
F flat
1/4
SS-4-TSW-6
0.75 (19.0)
0.28 (7.1)
3/8
SS-6-TSW-6
0.88 (22.4)
1/2
SS-8-TSW-6
1.06 (26.9)
Pressure
Rating
psig (bar)
0.19 (4.8)
0.48 (12.2) 10 700 (737)
0.31 (7.9)
0.28 (7.1)
0.60 (15.2)
8 100 (558)
0.38 (9.7)
0.41 (10.4) 0.73 (18.5)
6 600 (454)
3/4
SS-12-TSW-6
1.31 (33.3) 0.44 (11.2) 0.63 (16.0) 1.04 (26.4)
5 900 (406)
1
SS-16-TSW-6
1.44 (36.6) 0.62 (15.7) 0.88 (22.4) 1.36 (34.5)
5 600 (385)
Tube
Socket
Size
Male
NPT
Size
Ordering
Number
Dimensions
A
D
E
F
Tx
Dimensions, in. (mm)
1/4
Tx E
D
3/8
A
1/2
Female Connector
F flat
1/4
SS-4-TSW-1-4
1/4
SS-6-TSW-1-4
3/8
SS-6-TSW-1-6
1/2
SS-6-TSW-1-8
1/4
SS-8-TSW-1-4
3/8
SS-8-TSW-1-6
1/2
SS-8-TSW-1-8
1.15 (29.2)
1.25 (31.8)
0.28 (7.1)
psig (bar)
0.19 (4.8)
0.28 (7.1)
1.47 (37.3)
1.31 (33.3)
0.48 (12.2) 8000 (551)
11/16
8000 (551)
0.60 (15.2) 7800 (537)
7/8
0.28 (7.1)
0.38 (9.7)
1.53 (38.9)
0.38 (9.7)
0.41 (10.4)
Tube
Socket
Size
Female
NPT
Size
1/8
1/8
SS-2-TSW-7-2
0.83 (21.1)
1/8
SS-4-TSW-7-2
1.05 (26.7)
1/4
SS-4-TSW-7-4
1.18 (30.0)
1/4
SS-6-TSW-7-4
1.24 (31.5)
3/8
SS-8-TSW-7-6
1.36 (34.5)
1/2
SS-8-TSW-7-8
1.59 (40.4)
3/4
SS-12-TSW-7-12 1.73 (43.9) 0.44 (11.2) 0.63 (16.0)
Ordering
Number
9/16
5/8
0.31 (7.9)
3/4
7700 (530)
0.73 (18.5) 6600 (454)
7/8
Dimensions
A
E
F
Tx
Pressure
Rating
0.10 (2.5)
0.09 (2.3)
9/16
0.29 (7.4)
6500 (447)
0.28 (7.1)
0.19 (4.8)
0.31 (7.9)
0.28 (7.1)
D
Dimensions, in. (mm)
Tx E
D
1/4
A
3/8
1/2
3/4
Pressure
Rating
0.38 (9.7)
psig (bar)
0.41 (10.4)
9/16
3/4
3/4
7/8
1 1/16
1 5/16
0.48 (12.2)
6500 (447)
6600 (454)
0.60 (15.2) 6600 (454)
0.73 (18.5)
5300 (365)
4900 (337)
1.04 (26.4) 4600 (316)
14
Weld Fittings
Tube Socket Weld Fittings
90° Union Elbow
L
Tube
Socket
Size
F flat
Dimensions
Ordering
Number
D
E
F
L
Pressure
Rating
Tx
Dimensions, in. (mm)
Tx E
D
L
D
90° Male Elbow
L
SS-4-TSW-9
0.28 (7.1)
0.19 (4.8)
7/16
0.86 (21.8) 0.53 (13.5) 10 700 (737)
3/8
SS-6-TSW-9
0.31 (7.9)
0.28 (7.1)
1/2
1.04 (26.4) 0.64 (16.3)
8 100 (558)
1/2
SS-8-TSW-9
0.38 (9.7)
0.41 (10.4)
11/16
1.17 (29.7) 0.81 (20.6)
6 600 (454)
3/4
SS-12-TSW-9
0.44 (11.2) 0.63 (16.0)
1
1.56 (39.6) 1.12 (28.4)
5 900 (406)
1
SS-16-TSW-9
0.62 (15.7) 0.88 (22.4)
1 1/4
1.92 (48.8) 1.44 (36.6)
5 600 (385)
Tube
Socket
Size
F flat
Tx E
1/4
D
Male
NPT
Size
1/4
1/4
L1
3/8
3/8
1/2
90° Female Elbow
F flat
L
Tx E
1/2
1/2
Tube
Socket
Size
Female
NPT
Size
1/4
L1
D
1/4
1/4
Dimensions
Ordering
Number
D
1/2
1/2
Tube
Socket
Size
F flat
Tx E
1/8
D
D
L
1/4
3/8
1/2
(7.1)
3/4
1
1/2
(4.8)
1/2
SS-6-TSW-2-6
0.31
0.28
(7.9)
(7.1)
11/16
SS-6-TSW-2-8
13/16
SS-8-TSW-2-8
0.38
0.41
(9.7)
(10.4)
D
E
13/16
(7.1)
SS-6-TSW-8-4
SS-8-TSW-8-8
SS-6-TSW-3
SS-8-TSW-3
SS-12-TSW-3
SS-16-TSW-3
11/16
(4.8)
0.31
0.28
(7.9)
(7.1)
0.38
0.41
(9.7)
(10.4)
SS-6-TSW-8-8
SS-4-TSW-3
Tx
Pressure
Rating
0.79
1.05
0.48
psig (bar)
8000
(20.1)
(26.7)
(12.2)
(551)
1.04
1.05
0.64
8000
(26.4)
(26.7)
(16.3)
(551)
0.97
1.17
0.60
7800
(24.6)
(29.7)
(15.2)
(537)
1.02
1.45
0.60
7700
(25.9)
(36.8)
(15.2)
(530)
1.08
1.45
0.73
6600
(27.4)
(36.8)
(18.5)
(454)
L
L1
Tx
Pressure
Rating
0.90
1.17
0.48
psig (bar)
7400
(22.9)
(29.7)
(12.2)
0.99
1.17
(25.1)
(29.7)
0.60
(509)
1.13
1.56
(15.2)
5700
(28.7)
(39.6)
1.19
1.56
0.73
5700
(30.2)
(39.6)
(18.5)
(392)
F
Dimensions, in. (mm)
0.19
0.28
SS-4-TSW-8-4
SS-2-TSW-3
L1
Dimensions
Ordering
Number
Ordering
Number
L
F
SS-6-TSW-2-4
A
1/2
E
Dimensions, in. (mm)
0.19
0.28
SS-4-TSW-2-4
3/8
Union Tee
psig (bar)
1/4
11/16
1
1
Dimensions
A
D
E
Dimensions, in. (mm)
0.10
0.09
1.18
(30.0)
(2.5)
(2.3)
1.72
0.28
0.19
(43.7)
(7.1)
(4.8)
2.08
0.31
0.28
(52.8)
(7.9)
(7.1)
2.34
0.38
0.41
(59.4)
(9.7)
(10.4)
3.12
0.44
0.63
(79.2)
(11.2)
(16.0)
3.84
0.62
0.88
(97.5)
(15.7)
(22.4)
F
7/16
7/16
1/2
11/16
1
1 1/4
(509)
7400
(392)
L
Tx
Pressure
Rating
0.59
0.29
psig (bar)
12 600
(15.0)
(7.4)
(868)
0.86
0.53
10 700
(21.8)
(13.5)
(737)
1.04
0.64
8 100
(26.4)
(16.3)
(558)
1.17
0.81
6 600
(29.7)
(20.6)
(454)
1.56
1.04
5 900
(39.6)
(26.4)
(406)
1.92
1.45
5 600
(48.8)
(36.8)
(385)
Weld Fittings
Tube Socket Weld Fittings
Union Cross
Tube
Socket
Size
L
Dimensions
Ordering
Number
A
Tx E
3/8
D
1/2
3/4
A
1
Tube Butt Weld to
Tube Socket Weld
Tube
OD
SS-4-TSW-4
SS-6-TSW-4
SS-8-TSW-4
SS-12-TSW-4
SS-16-TSW-4
Wall
Thickness
(43.7)
(7.1)
(4.8)
2.08
0.31
0.28
(52.8)
(7.9)
(7.1)
2.34
0.38
0.41
(59.4)
(9.7)
(10.4)
3.12
0.44
0.63
(79.2)
(11.2)
(16.0)
3.84
0.62
0.88
(97.5)
(15.7)
(22.4)
Tube
Socket
Size
L
Tx
Pressure
Rating
0.86
0.53
psig (bar)
10 700
(21.8)
(13.5)
(737)
1.04
0.64
8 100
(26.4)
(16.3)
(558)
1.17
0.81
6 600
(29.7)
(20.6)
(454)
1.56
1.20
5 900
(39.6)
(30.5)
(406)
1.92
1.45
5 600
(48.8)
(36.8)
(385)
F
7/16
1/2
11/16
1
1 1/4
Dimensions
Ordering
Number
A
D
E
Tx
Pressure
Rating
0.56
0.10
0.09
0.29
psig (bar)
12 600
Dimensions, in. (mm)
D
1/4
E
E
Dimensions, in. (mm)
0.28
0.19
1.72
F
1/4
D
Tx
3/8
0.08
(2.0)
0.07
(1.8)
A
1/2
3/4
1
0.09
(2.2)
0.11
(2.8)
0.13
(3.2)
1/8
SS-4-MTW-A-2TSW
1/4
SS-6-MTW-A-4TSW
1/4
SS-8-MTW-A-4TSW
3/8
SS-8-MTW-A-6TSW
1/2
SS-12-MTW-A-8TSW
1/2
SS-16-MTW-A-8TSW
(14.2)
(2.5)
(2.3)
(7.4)
(868)
0.75
0.28
0.19
0.48
8 200
(7.1)
(4.8)
(12.2)
(564)
0.28
0.19
0.50
(19.0)
0.88
(7.1)
(4.8)
(12.7)
7 500
(22.4)
0.31
0.33
0.60
(516)
(7.9)
(8.3)
(15.2)
1.12
0.38
0.41
0.75
(28.4)
(9.7)
(10.4)
(19.0)
6 300
(434)
1.38
0.38
0.41
0.73
5 300
(35.1)
(9.7)
(10.4)
(18.5)
(365)
Pipe Socket Weld Fittings
Quality machining of all
surfaces ensures
consistent welding to pipe.
Ordering Information and Dimensions
■ Dimensions are for reference only and are subject to
change.
■ See Cleaning and Packaging, page 2, to order pipe
socket weld fittings cleaned in accordance with Swagelok
Special Cleaning and Packaging (SC-11), MS‑06‑63.
Union
D
D
P
Pipe
Size
Px P E
1/4
A
3/8
1/2
3/4
1
Ordering
Number
Heavy wall, plus strength
of material, ensures long
life in severe service
applications.
Dimensions
E
Px
Pressure
Rating
Dimensions, in. (mm)
0.39
1.06
SS-4-PSW-6
0.36
0.88
psig (bar)
8100
(26.9)
(9.9)
(9.1)
(22.4)
(558)
1.12
0.39
0.49
1.03
7100
(28.4)
(9.9)
(12.4)
(26.2)
(489)
1.12
0.39
0.62
1.25
6800
(28.4)
(9.9)
(15.7)
(31.8)
(468)
1.75
0.51
0.82
1.47
5800
(44.4)
(13.0)
(20.8)
(37.3)
(399)
1.75
0.51
1.05
1.86
6100
(44.4)
(13.0)
(26.7)
(47.2)
(420)
SS-6-PSW-6
SS-8-PSW-6
SS-12-PSW-6
SS-16-PSW-6
A
D
Socket depth equals or
exceeds requirements of
ASME B16.11 and ensures
proper pipe support.
15
Pipe Butt Weld Fittings
Ordering Information and Dimensions
37 1/2° chamfer ensures
proper weld
(not included on 1/4 in. size).
■ Dimensions are for reference only and are subject to
change.
■ See Cleaning and Packaging, page 2, to order pipe
Male weld end can be
butt or socket welded.
butt weld fittings cleaned in accordance with Swagelok
Special Cleaning and Packaging (SC-11), MS‑06‑63.
Tube Socket Weld
to Pipe Butt Weld
Tube
OD
Pipe
Size
(Sch 80)
37 1/2°
D
E
Tx
Dimensions
Ordering
Number
A
D
E
Tx
Dimensions, in. (mm)
1/4
A
3/8
1/2
3/4
1/4
SS-4-MPW-A-4TSW
0.88 (22.4)
1/2
SS-8-MPW-A-4TSW
1.12 (28.4)
3/8
SS-6-MPW-A-6TSW
1.03 (26.2)
1/2
SS-8-MPW-A-6TSW
1.12 (28.4)
3/4
SS-12-MPW-A-6TSW
1.50 (38.1)
1
SS-16-MPW-A-6TSW
1.38 (35.1)
3/8
SS-6-MPW-A-8TSW
1/2
3/4
Pressure
Rating
psig (bar)
0.28 (7.1)
0.19 (4.8)
0.48 (12.2)
10 300 (709)
7 800 (537)
8 100 (558)
0.31 (7.9)
0.28 (7.1)
0.60 (15.2)
1.00 (25.4)
0.38 (9.7)
0.42 (10.7)
SS-8-MPW-A-8TSW
1.19 (30.2)
0.38 (9.7)
0.41 (10.4)
SS-12-MPW-A-8TSW
1.50 (38.1)
0.38 (9.7)
0.41 (10.3)
1
SS-16-MPW-A-8TSW
1.56 (39.6) 0.44 (11.2)
0.38 (9.7)
3/4
SS-12-MPW-A-12TSW
1.50 (38.1) 0.44 (11.2) 0.62 (15.7) 1.05 (26.7)
7 800 (537)
6 600 (454)
6 000 (413)
6 600 (454)
0.73 (18.5)
6 600 (454)
6 600 (454)
6 000 (413)
5 900 (406)
Swagelok Orbital
Welding System
See the Swagelok Welding
System M200 Power Supply
catalog, MS‑02‑342, for more
information.
Safe Product Selection
When selecting a product, the total system design must
be considered to ensure safe, trouble-free performance.
Function, material compatibility, adequate ratings,
proper installation, operation, and maintenance are the
responsibilities of the system designer and user.
Warranty Information
Swagelok products are backed by The Swagelok Limited
Lifetime Warranty. For a copy, visit swagelok.com or contact
your authorized Swagelok representative.
Swagelok, Micro-Fit—TM Swagelok Company
© 2009–2015 Swagelok Company
Printed in U.S.A., AGS
February 2015, R10
MS-01-149