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Stainless steel repair clamp, four bolts, 12 inch length

Matco-Norca

Matco-Norca 330-0312 1/2 in 4-Bolt 304SS Repair Clamp 12 in

SKU CH-A0ZB-3Y6YR MPN 330-0312

A four-bolt stainless steel repair clamp for 1/2 inch pipe, rated to 150 psi and 212°F

  • TypeDrain Components
  • 304 stainless steel resists corrosion for long service life
  • Four-bolt design distributes clamping force evenly around the pipe
  • Nitrile rubber gasket seals gasoline, oils and natural gas up to 150 psi
  • 12-inch overall length covers the damaged section completely
  • Rated to 212 °F for hot-water and steam applications

304 Stainless Steel Repair Clamp for 1/2 in Pipes

This four-bolt clamp is made from 304 stainless steel and fits a 1/2 in pipe. It provides a 12 in overall length with partial gasket coverage using nitrile rubber. The clamp handles aromatic hydrocarbons, gasoline, mineral oils, natural gas, petroleum oils and vegetable oils. It is suited for maintenance teams needing a corrosion-resistant clamp for these fluid types.

Pressure and Temperature Limits in Normal Use

The clamp is rated for a maximum operating pressure of 150 psi and a maximum vacuum pressure of 150. It withstands a maximum operating temperature of 212 degrees F. The nitrile rubber gasket maintains its seal across this range. Bolt material is steel, securing the stainless steel band under these conditions.

Fitting the Clamp into a Plumbing System

The 12 in length covers the damaged section while the four bolts distribute clamping force evenly. Partial gasket coverage targets the leak area without requiring full pipe circumference access. The 304 stainless steel body resists corrosion from the listed fluids, reducing the need for frequent replacement. No specialised tools beyond standard wrenches are required for the steel bolts.

Highlights

  • 304 stainless steel resists corrosion for long service life
  • Four-bolt design distributes clamping force evenly around the pipe
  • Nitrile rubber gasket seals gasoline, oils and natural gas up to 150 psi
  • 12-inch overall length covers the damaged section completely
  • Rated to 212 °F for hot-water and steam applications

Specifications

TypeDrain Components
BrandMatco-Norca
Model330-0312

Questions about this item

How do I install the 330-0312 repair clamp on a 1/2 in pipe, and what step is commonly missed?

Position the nitrile rubber gasket over the leak, wrap the 304 stainless steel band around the pipe, then tighten all four steel bolts evenly in a cross pattern; the step often missed is checking that the gasket seats fully before final torque.

What maintenance or replacement will the 330-0312 clamp need over time?

The nitrile rubber gasket can harden or swell after prolonged contact with gasoline, mineral oils or vegetable oils at temperatures up to 212 °F, so inspect it periodically and replace the gasket if it shows cracking or loss of elasticity.

What is the first limit the 330-0312 clamp reaches under sustained pressure and heat?

The clamp is rated for 150 psi maximum operating pressure and 212 °F maximum operating temperature; sustained exposure at or above either limit will cause the gasket to degrade before the 304 stainless steel band or steel bolts fail.

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