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Mechanical , Stepped coupling /  Flanged Adaptor

Introduction

There are several methods of joining pipes , flexible compression type joints , o  ring joints , welding and flanging . Mechanical coupling is manufactured to join most type of plain ended pipes and virtually all rigid pipes and allows the pipe joint to be buried for many years service without any maintenance on the pipe joint itself .

The couplings are protected for life against corrosion with a Fusion Bonded Epoxy Powder Coatings . Tightening of a set of bolts moving the end flanges towards each other , compressing the rubber sealing rings in the recesses between the centre sleeve and end flanges onto the pipe surface forming and assuring effective and long term leak proof joint .

Material Specifications

End Flanges & Centre Sleeve a) Rolled Steel to BS 4360 Grade 43 A
b) External & Internal coating " Fusion Bonded
    Powder " at 300 microns thick .      
Bolts , Nuts & Washers a) Hexagon type to  BS 4190/BS 916
b) Coating for Bolts & Nuts : Zinc Plated and then
    Fusion Epoxy Powder Coated (30-100 micron)
c)  Coating for washers : Hot Dipped galvanized .
Rubber Rings a) Natural Rubber to BS 2494
Working Test Pressure a) 30 Bars

Technical & Physical Properties

  STANDARD VALUE
Hardness DIN53153
ISO2815
70 - 100 +
Impact Resistance
( Direct )
Modified ASTM - 14 -72 60 - 160 lbs / in
Pencilhardness                 - HB - 5H
Adhesion DIN53131 - 3mm
ISO2409 - 2mm
G10 - no loss of adhesion
Approx . 500kg/cm
2
Elongation ASTM D - 2370 -68 Approx 6 %
Salt Spray ASTM B 117 - 73 3000 hrs , no surface rust 0 - 2mm creepage
Temperature stabilitity Dry heat Excellent adhesion continuous
exposure at 100
0 c
Water Immersion a) ASTM D870 - 54
    Distilled water 38
0 c
b) Tap water approx  88
0 c
3000 hrs no blistering or other failure.
48 hrs no blistering or loss of adhesion .

» Surface preparation near - white blast as defied by SSPC - SPIO Swedish SA 2 1/2. Film thickness 300 microns .
 

Kindly downloading the following technical specification and dimension information :-

  Mechanical Coupling

   Mechanical Flanged Adaptor

 

 

 

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