MS 628: PART 2
MS 628: PART 1 + PART 2: 1999 – PVC-U PIPES FOR WATER SUPPLY & JOINTS AND FITTINGS FOR USE WITH UNPLASTICIZED PIPES
This pipe standard is designed for pressurized cold water services and the pipes are produced with plain end (Part 1) or bell-end shape (Part 2). It offers reliable service from low to high pressure.
The thicknesses vary according to the nominal pressure rating of the pipes; PN 9, PN 12 and PN 15.
Each bell-end pipe is fitted with a rubber ring to provide water tightness at the joint with the rubber’s elasticity. When water pressure is exerted, it expands the lip from the inside of the joint. This expanding force increases with the pressure of the water. Therefore, an elastic reinforcement with the rubber ring will further enhance the secondary sealing effect.