Tube Fittings: Stainless Steel

LOKRING’s stainless steel fittings are qualified to the requirements of the ANSI/ASME B31 pressure piping codes for pressure and fatigue design, and materials of construction. Extensive mechanical and environmental testing has demonstrated the mechanical and sealing integrity of the LOKRING connection in a wide range of applications and environmental conditions.

NO WELDS, NO FLANGES

NO THREADS, NO LEAKS!

By eliminating welding in the unit, many overhead costs, relating to safety, personnel, equipment and supplies, inspection rework, and monitoring can be eliminated or substantially reduced.

 


Some examples are:

  • Obtain fire permit for hot work
  • Erect scaffolding and provide ventilation
  • “Sniff” area, gas free, and weather protect
  • Blank flanges and nozzles
  • Establish fire watch
  • Build fire box or tarps
  • Drain, flush, and dry lines
  • Place equipment, electric cables, and purge line
  • Craines, welders, grinders, and small tools
  • Weld consumables (purge gas and filler rod)
  • Workers’ compensation, insurance, and benefits
  • Weld X-ray or other NDT
  • Rework of damaged or misaligned spools
  • System soak, flush, or passivation; HAZMAT disposal
  • Maintain and monitor flanges for leakage

In addition, scarce ASME-certified welders are freed up for large bore pipe or pressure vessel welding.







Pressure and Temperature Ratings

Stainless Steel Tube Fittings

Lokring Stainless Steel Tube Fittings Tube O.D. (Measured in inches) Available Sizes (Defined 1/16”) Tube Wall Thickness Measure In (Inches)

0.035

0.049

0.065

0.083

0.095

0.109

0.120

SS

Tube Product

1/4

T04

5100

7500

9050¹





3/8

T06

3300

4800

5650¹





1/2

T08

2600

3700

4270¹

²




5/8

T10

2100

2900

3750¹

²




3/4

T12

1700

2400

4200

²

²



7/8

T14


²

2800

²

²

²


1”

T16



2400

3100

²

²


1-1/4”

T20



1900

2400

2800

3300

²

1-1/2”

T24



1600

2000

2300

2700

3000

2”

T32



1100

1500

²

²

²

2-1/2”

T40



900

1200

²

²

²

¹ - Lokring de-rates the Max Allowable Tube Pressure
² - Consult LOKRING for details



Temperature de-rating Table for Lokring SS Tube Fittings

Temperature Degrees
(°F)

Temperature
de-rating factor

200°

1.00

300°

1.00

400°

0.97

500°

0.90

600°

0.85

650°

0.84

700°

0.82

750°

0.81


NOTES:

1.

On indicated wall thicknesses at ambient temperature. See specification FS40-T for details.

2.

See LOKRING’s “Corrosive Service Guidelines” for specific service details.

3.

See “LOKRING Fitting Applications Guide” for more details.

4.

Fitting material 316L Stainless Steel as per ASTM A276 or ASTM 479.


MATCHING TUBE:

Stainless Steel:
For use on:


  • 316/316L stainless steel tube to ASTM A269 or ASTM A213


  • 304/304L stainless steel tube to ASTM A269 or ASTM A213



    GeneralInformation

    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”(T04)

    0.88”

    0.73”

    0.54”

    0.257”

    1.25”

    3/8” (T06)

    1.26”

    0.92”

    0.72”

    0.382”

    1.63”

    1/2” (T08)

    1.34”

    1.00”

    0.87”

    0.507”

    1.63”

    5/8” (T10)

    1.53”

    1.12”

    1.05”

    0.632”

    2.00”

    3/4" (T12)

    1.56”

    1.17”

    1.17”

    0.757”

    2.00”

    7/8" (T14) 1.50" 1.13" 1.20" 0.882" 2.00"
    1" (T16) 1.59" 1.21" 1.38" 1.007" 2.00"
    1 1/4" (T20) 2.04" 1.51" 1.81" 1.257" 2.50"
    1 1/2" (T24) 2.12" 1.58" 2.11" 1.507" 2.75"
    2" (T32) 2.65" 1.97" 2.56" 2.007" 3.25"
    2 1/2" (T40) 3.27" 2.46" 3.10" 2.507" 4.61"

     

    1. All dimensions are in inches.
    2. Dimensions A, B, C, D, & E are applicable to other fittings of the same size.
    3. For use on 316, 316L, 304 and 304L seamless and welded stainless steel tube as per ASTM A269 or A213. See table for qualified wall thickness.
    4. Coupling "thru-bore" design permits tube to pass completely through (except SS40-T04). All other fittings (tees, elbows, etc.) have an internal travel stop.
    5. Material 316L Stainless Steel as per ASTM A276 or ASTM 479.
    6. Fittings from T04-T12 & T32-T40 are SS40-Txx. Fittings from T14-T24 are SS-3000-Txx.
    7.All dimensions are for reference only and subject to change.