Socket Weld SQS Test Plug

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SQS test plugs are designed to facilitate testing socket weld fittings and couplings. During installation, the grippers expand within the socket holding the plug in position while the seal element expands and seals off the bore of the fitting. Designed for ASTM A105 3000 LB carbon steel socket weld fittings.

Test Pressure
5000 PsiG (345 BarG)

Size Range
1/2” to 2” NPS (DN15 to DN50) - Larger sizes available upon request

Standard Seal Material

Additional Seal Materials
Neoprene, Fluoroelastomer, Silicone, EPDM, Natural Rubber, Nitrile Buna-N, SBR Buna-S


  • Unique “Twin Cone” design provides uniform gripper expansion that ensures 100% contact between the test plug and the socket weld fitting
  • Long wearing urethane seals provide easy plug installation and removal  
  • Replacement grippers and seals available, allowing you to use the SQS hydrostatic test plug multiple times