Product Description:
Please quote for the following wholesale product requirement -
Product Name: Repair Clamps
Specifications:
Bands
Nominal Pipe Size (Inch)
Pipes Material Type
Length (mm)
No. bolts
Single Band 2
HDPE
3500
150 2
3
DI
150
150
2
4
DI
1000
150
2
5
HDPE
1000
150
2
6
DI
200
200
3
Double Bands
8
DI
25
300
3*
1. SCOPE
This Specification specifies the requirements for the design, materials and in-service performance of mechanical stainless steel repair clamps for waterworks purposes.
This Specification is designated for applications involving rigid pipes, typically ductile iron (DI), grey cast iron (CI), and steel (S). Also, for applications involving flexible pipes, typically un-plasticized polyvinylchloride (PVC-U) and high-density polyethylene (HDPE).
All materials and Equipment shall be in every respect suitable for storage, installation, use and operation in the conditions of temperature, humidity and The PH and water quality appertaining in Jordan.
The atmospheric temperature in Jordan varies between -10 C and 50 C.
2. Application
Stainless steel repair clamps complying with this specification are intended for use in repair of water supply pipelines of the size designated in Table 1, with a maximum service temperature of 50°C and up to an allowable operating pressure of 16 bars for ranges diameter up to 250 mm and 10 bar for diameters larger than 250 mm. Repair clamps have limited ability to accommodate axial deflection and are, therefore, not generally intended for use as couplings to join tow pipes together. However, they are commonly utilized for repair situations at full pipe break, where the pipe ends are considered stable. In addition, repair clamps complying with this specification are intended to provide a permanent means of preventing loss from or contamination of pipelines that have been affected by corrosion or mechanical damage in both above-ground and buried applications.
3. Materials
The material of the Clamps shall be
Bands: Stainless Steel Grade AISI 304(A2) to BS1449:1991: part 2 or Grade AISI 316(A4) stainless steel to BS 1449:1991:part 2, for corrosion resistance.
Bolts shall be Stainless Steel A2, Teflon coated, or mild steel. Nuts & washers shall be Stainless Steel A2, or mild steel class 4.6 to BS EN20898: Part 1. Receiver bars shall be TIG- welded to shell to form strong fusion, and fully passivated after welding,
Gasket shall have a gridded pattern for positive sealing, and to be made of specially compounded NBR rubber specially formulated for water service or EPDM. Compound Grade E to BS2494:1990
4. Design
The Clamps shall be used for permanent repair of cracks, holes, or complete breakages of steel, ductile Iron, PVC and HDPE pipes.
The Clamps shall be suitable for potable water for Temperature range (-10 to 50) C. potable water certificate must be submitted .
Repair Clamps shall be standard full circle single band for diameter 150mm or less. And full circle double band for diameter more than 150mm, length and number of bolts not less than the values in Table 1 for each diameter.
Gasket shall provide a 360o sealing surface and of such size and shape to provide an adequate compressive force against the pipe after assembling to affect a positive seal under all combinations of joint and gasket tolerances. And heavy gauge Type 304 stainless Steel bridge plate shall be attached into the gasket end to span the lug area and to make installation quick and easy.
Bolt retainer assembly or lugs shall be of a type 304 stainless steel, and shall be MIG welded to receiver bar and fully passivated after welding. Lugs may be cast, forged or cold formed of type 304 stainless steel, and may include a high impact polycarbonate plastic, non corrosive retainer. Lug design shall
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