Pipe Fittings: Stainless Steel

LOKRING Technology Pipe Solutions: Stainless Steel

LOKRING fittings patented, permanent, metal-to-metal seals help reduce heat-affected zones which are susceptible to accelerated corrosion due to the heat-affected stresses of welding.

Pressure and Temperature Ratings

Stainless Steel Pipe Fittings

Lokring Stainless Steel Pipe Fittings

Lokring Size

Pipe NPS

Pressure Rating in PSI (Bar)

ASME B31.1

Pipe Schedules

ASME B31.3

Pipe Schedules

Stainless Steel

Pipe Product

P04

1/4”

3781
(261)

5300
(365)

6000
(414)

4529
(312)

6300
(434)

8000
(552)

P06

3/8”

3400
(234)

4900
(338)

5750
(396)

3600
(248)

5200
(359)

6100
(429)

P08

1/2”

4030
(278)

4760
(328)

4290
(296)

5060
(349)

P12

3/4”

3170
(219)

4210
(290)

4930
(340)

3380
(233)

4470
(308)

5250
(362)

P16

1″

3340
(230)

3680
(254)

3990
(275)

3550
(245)

3920
(270)

4240
(292)

P20

1-1/4″

2450
(169)

2700
(186)

2980
(205)

2675
(184)

2910
(201)

3170
(219)

P24

1-1/2″

2260
(156)

2440
(168)

2410
(166)

2600
(179)

P32

2″

1500
(103)

2200
(152)

2500
(172)

1600
(110)

2300
(159)

2700
(186)

P48

3″

920
(63)

1700
(117)

1350
(93)

1150
(79)

2100
(145)

1705
(118)

* not tested

TEMPERATURE RATING:

Piping systems containing the pipe assemblies listed above may establish design pressures up to and including the ambient maximum design pressure given for temperatures from -60° to 100°F (-50° to 40°C) for ASME B31.1, and from -325° to 100°F (-200° to 40°C) for ASME B31.3. For temperatures above 200°F the maximum design pressure given shall be multiplied by the temperature de-rating factor listed below.

Temperature De-rating Table For Lokring Carbon Steel (CS) Fittings
Temperature °F (°C)	De-rating factor B31.1	De-rating factor B31.3
200° (93°)	1.00	1.00
300° (148°)	0.98	1.00
400° (204°)	0.96	0.97
500° (260°)	0.96	0.90
600° (315°)	0.90	0.85
650° (343°)	0.89	0.84
700° (371°)	0.87	0.82
750° (398°)	0.86	0.81
800° (426°)	0.85	0.80

NOTES:

1.	Fitting material 316L Stainless Steel as per ASTM A276 or ASTM A479
2.	LOKRING Stainless Steel Pipe Fittings are of a “slip-over” design facilitating zero-clearance pipe repair
3.	See LOKRING Specification FS40 for details on Pressure and Temperature Ratings
4.	See LOKRING “Corrosive Service Guidelines” for specific service details
5.	See “LOKRING Fitting Applications Guide” for additional design and service details

General Information

Fitting Size (PXX)	Insertion Depth Pre-Install A	Insertion Depth Pre-Install B	Outside Diameter C	Inside Diameter D	Minimum Straight Run Before a bend, E
1/4”(P04)	1.44”	1.05”	1.06”	0.56”	1.89”
3/8” (P06)	1.60”	1.18”	1.28”	0.69”	2.08”
1/2” (P08)	1.72”	1.29”	1.49”	0.86”	2.24”
3/4” (P12)	1.94”	1.44”	1.61”	1.07”	2.52”
1″ (P16)	2.20”	1.66”	1.96”	1.33”	2.86”
1 1/4″ (P20)	2.51″	1.90″	2.37″	1.68″	3.33″
1 1/2″ (P24)	2.80″	2.05″	2.63″	1.92″	3.64″
2″ (P32)	3.28″	2.53″	3.25″	2.41″	4.13″
3″ (P48)	4.71″	3.41″	4.50″	3.53″	6.12″

1. All dimensions are in inches.
2. Dimensions A, B, C, D, & E are applicable to other fittings of the same size within this catalog.
3. For use on 316, 316L, 304, 304L stainless steel pipe as per ASTM A312 and Carbon Steel ASTM A53 or A106. See table for qualified wall thickness.
4. For tooling dimensions refer to appropriate catalog.
5. Coupling “thru-bore” design permits tube to pass completely through. All other fittings (tees, elbows, etc.) have an interval travel stop.
6. Fitting material 316L Stainless Steel as per ASTM A276 or ASTM 479.
7. LLOYD’S, USCG approved.
8. Fire approved per CFR 46 regulations.
9. All dimensions are for reference only and subject to change (CAD files available upon request).