During installation, the axial movement of the LOKRING (TM) driver over the fitting body swages the body onto the pipe surface, compressing the pipe wall first elastically and then plastically. The pipe wall resists this swaging action, generating high unit compressive loads at the contact points between narrow sealing lands inside the fitting body and the pipe surface.

These contact stresses are sufficiently high to plastically yield the pipe surface under the sealing lands, forming a 360 degree circumferential, permanent, metal-to-metal seal between the pipe and fitting body. The driver, which experiences a small increase in diameter (elastic strain) during installation, exerts an elastic, radial pre-load on the metallic seals for the life of the connection.

GAS-TIGHT, PERMANENT SEAL
The unique metal-to-metal seal of the LOKRING connection provides extraordinary sealing integrity in both liquid and gas services. Unlike other mechanically attached fittings, there are no elastomeric or rubber seals, o-rings, or gaskets which can degrade and leak over time from chemical attack, fire, vibration, temperature cycling, cold flow, or loss of elasticity. As a result, fugitive emissions typical of leak-prone screwed or flanged connectors are eliminated.

LOWER TOTAL INSTALLED COST
TWICE THE PRODUCTIVITY OF WELDED PIPE...
A fitter/helper team can routinely field erect, fit-up, and install 50-60 LOKRING fittings in a single shift. This productivity more than doubles the rate at which welded piping systems are typically shop fabricated and field erected. In addition to a reduction in labour hours of 50% or more, the labour-hour rate is reduced by reconfiguring welder/fitter crews to fitter/helper crews, lowering the composite crew rate by 10-20%. This combination of greater productivity and lower man-hour rates translates into labour cost savings of 60% or more.

...WITHOUT THE WELDING OVERHEAD
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
• Cranes, 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.

ANSIB31 Qualifications and Testing Both stainless and carbon steel LOKRING 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.

MAS-3000 CARBON STEEL FITTINGS

Qualified Matching Pipe Seamless carbon steel to ASTM A106/A53S ERW carbon steel to ASTM A53E/A587 ASTM A333 Grade 6 within temp / pressure envelope shown below.

Pressure-Temperature Rating

Pipe	Pipe	Design Pressure	Design Temperature
NPS	Sch	Psi (Bar)	Degrees in F (C)
1/4"	40/80/160	8,810 (607)	-20 to 650 (-29 to 343)
3/8"	40/80/160	7,470 (515)	-20 to 650 (-29 to 343)
1/2"	40/80/160	7,000 (482)	-20 to 650 (-29 to 343)
3/4"	40/80/160	5,870 (404)	-20 to 650 (-29 to 343)
1"	40/80/160	5,440 (375)	-20 to 650 (-29 to 343)
1-1/4"	40/80	4,460 (307)	-20 to 650 (-29 to 343)
1-1/2"	40/80	3,960 (273)	-20 to 650 (-29 to 343)
2"	40/80	3,230 (222)	-20 to 650 (-29 to 343)
3"	40/80	2.470 (170)	-20 to 650 (-29 to 343)

Notes
See appropriate product catalogue for available configurations and dimensions.
See "LOKRING Fitting Applications Guide" for more details.

Qualified Matching Pipe Stainless steel to ASTM A312 Type 304/304L/316/316L