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Socket Weld Contraction Rings

Category: Gauges, Welding Inspection

Caltech India offers Gap-A-Let® Socket Weld Contraction Rings. Gap-A-Let® is a split ring that is engineered and designed to give you a pre-measured 1/16″ minimum gap for socket welds. Made from a certified stainless steel, Gap-A-Let® resists corrosion from chemicals, radioactive materials, and water. Buy Socket Weld Contraction Rings from us now!!

The function of the gap is to permit thermal expansion of the pipe. Without the gap, the heat of welding can cause the pipe to expand at a faster rate than the fitting. If the pipe bottoms against the socket fitting, the thermal growth of the pipe strains the weld, possibly producing cracks in the root.

Failures have also been observed in socket welds subjected to thermal and mechanical cycling during service. The mechanism is similar to failure during welding. Rapid temperature changes cause the pipe to expand against the bottom of the fitting, straining and cracking the weld. Construction and Military codes such as ANSI, ASME, NAVSEA-250-1500-1, MIL-STD-278 and MIL STD-22 permit socket welds to be used, provided a minimum 1/16″ (1.6 mm) is established between the pipe end and socket prior to welding.

Gap-A-Let® spring tension makes it fit tightly into all standard sized fittings from 1″ to 4″. (Non-standard sizes are available upon request.) Once inserted into the fitting, the Gap-A-Let® ring becomes a permanent part of the joint. It will not rattle or vibrate even under extreme pressure.

Where Is It Used?

Designed for use on any socket weld application, Gap-A-Let® rings are suitable for Power Piping (Nuclear, Conventional), Industrial Hydraulics, Welded Railroad Air Brake Piping, Petrochemical Plants, Fertilizer Plants, Shipbuilding, and the list goes on and on.

What Does It Do For You?

  • Cut fit-up time by up to 90%
  • Save thousands of dollars in cracked weld repairs.

Socket welds that once took 15 minutes or more to fit-up now take just seconds. There is no measuring, scribing, or re-measuring. Just pop the Gap-A-Let® into the fitting and insert pipe into the fitting, Gap-A-Let® socket weld contraction rings automatically set the required 1/16″ minimum gap so you’re ready to weld.

And because these rings are so easy to use, they eliminate the problems caused by guessing the gap. No longer is there a need to scribe into hard-to-mark metal pipe walls. With Gap-A-Let® rings, quality control inspectors can concentrate on the quality of the weld and not spending valuable time measuring for proper gapping. And since the costly problem of cracked welds due to improper gap is practically eliminated, your pipes can safely transport fluids the first time and every time. Buy Socket Weld Contraction Rings manufactured by G.A.L Gage Company- USA and supplied by Caltech India with better quality and high effectiveness

A plus for piping engineers

Gap-A-Let® rings help piping engineers determine end-to-end length of pipe without guessing. Constant, proper gap gives precise length whether in field run or fab shop assembly.

Standard Gap-A-Let® Rings — 1/4″ NPS – 2″ NPS:

Each “Standard” Gap-A-Let® Ring is precision MACHINE-manufactured …

Standard RingFittingRing Free Outside DiameterRing Radial WallRing Thickness
1/4" NPS0.5550.60.070.025
3/8" NPS0.690.730.070.025
1/2" NPS0.8550.880.070.025
3/4" NPS1.0651.110.070.025
1" NPS1.331.3850.1050.03
1 1/4" NPS1.6751.780.1050.03
1 1/2" NPS1.9152.020.1050.03
2" NPS2.4062.580.1050.03

Heavy Duty Gap-A-Let® Rings — 2 1/2″ NPS – 4″ NPS:

Each “Heavy Duty” Gap-A-Let® Ring is precision HAND-manufactured …

Heavy Duty RingFittingRing Free Outside DiameterRing Radial WallRing Thickness
2 1/2" NPS2.9052.910.2050.035
3" NPS3.53.530.210.035
4" NPS4.54.550.230.035

In India, we have various customers from Mumbai, Delhi, Bangalore, Chennai, Hyderabad, Ahmedabad, Kolkata, Surat, Pune, Jaipur, Lucknow, Kanpur, Nagpur, Visakhapatnam, Indore, Bhopal, Patna, Vadodara, Ghaziabad, Ludhiana, Coimbatore, Madurai, Nashik, Srinagar, Aurangabad, Dhanbad, Allahabad and Ranchi in India.

We also export our range of products to worldwide countries like USA, Canada, Chile, United Kingdom – UK, Spain, Germany, Italy, Dubai, Abu Dhabi, U.A.E, Oman, Saudi Arabia, Singapore, Kuwait, Iran, Indonesia, Thailand, and many more as well.

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