BS 3974-1:1974

Co-operating organizations
Foreword
Specification
1 Scope
2 Definitions
3 Materials
4 Pipe hanger components
5 U-bolts, hook bolts and overstraps
6 Slider type supports
7 Roller type supports
8 Workmanship
9 Inspection
10 Manufacturer's certificate
11 Packaging and identification
Appendices
A Design considerations
B Data and formulae for pipework calculations
C Recommendations on methods of fixing
D Illustrations of typical pipe support assemblies
Tables
1 Dimensions of sling rod with screwed machined eye
2 Dimensions of sling rod with weldless eye nut
3 Dimensions of sling rod with integral forged eye
4 Dimensions of sling rod with hot formed eye
5 Dimensions of spherical washers
6 Dimensions of one piece strap (with screwed
     machined, forged and hot formed eye) for
     uninsulated steel pipe
7 Dimensions of pipe clips for steel pipes, Range A:
     - 20 deg C to 100 deg C
7a Dimensions of pipe clips for cast iron pipes, Range
     A: - 20 deg C to 100 deg C
8 Dimensions of pipe clips for steel pipes, Range B:
     -2 20 deg C to 400 deg C
9 Dimension of pipe clips for steel pipes, Range C:
     above 400 deg C to 470 deg C
10 Dimensions of U-bolts (not to grip pipe)
11 Dimensions of U-bolts (to grip pipe) and hook bolts
12 Dimensions of overstraps
13 Mass per metre run of steel pipe filled with fresh
     water and of insulation (density 200 kg/m3)
14 Recommended maximum spans for straight run of steel
     pipes excluding fittings
15 Mass per unit length of flanged grey iron pipes
     when filled with water
16 Recommended maximum spans for flanged grey iron
     pipes
Figures
1 Sling rod with screwed machined eye
2 Sling rod with weldless eye nut
3 Sling rod with integral forged eye
4 Sling rod with hot formed eye
5 Spherical washer
6 One piece strap, Range A: - 20 deg C to 100 deg C
7 Pipe clip for steel and cast iron pipes, Range A:
     - 20 deg C to 100 deg C
8 Pipe clip for steel pipes, Range B: - 20 deg C to
     400 deg C
9 Pipe clip for steel pipes, Range C: above 400 deg C
     to 470 deg C
10 U-bolt (not to grip pipe)
11a U-bolt (to grip pipe)
11b Hook bolt
12 Overstrap
13 Channel section slider support
14 Channel section slider support with saddle plate
15 Tee section slider support
16 Fabricated plate slider supports
17 Illustration of overlap and movement of slider on
     bearer
18 Roller type support with cast iron roller and chair
19 Roller type support with fabricated roller and
     rolled steel channel chair
20 Roller type support with mild steel roller and
     chair formed from rolled steel flat
21 Low-level trestle for multiple pipes
22 Suspended support for multiple pipes
23 Typical pipe support for brackets
24 Single tubular support
25 Multiple support for horizontal pipes
26 Hanger for uninsulated pipes
27 Tubular support for a single pipe
28 U-bolt hanger
29 Typical beam attachment for pipe hangers
30 Hook bolt
31 Pipe guides for uninsulated pipes
32 Typical spring hanger assembly
33 Spring hanger (alternative arrangement to that
     shown in Fig. 32)
34 Typical bracing arrangements
35 Hanger for supporting hot insulated pipes
36 Constant load type spring hangers
37 Pipe guides for insulated hot pipes
38 Hanger for insulated cold pipes
39 Hanger for insulated cold pipes
40 Typical support for insulated cold pipe
41 Trunnion support for uninsulated vertical pipes
42 Spring hammer for vertical pipes (variable load
     type)
43 Hangers for vertical pipes
44 Anchor for insulated or uninsulated pipes
45 Typical duckfoot supports
46 Pivot anchor for insulated hot pipe

Covers requirements for the design and manufacture of components for pipe hangers, slider and roller type supports for uninsulated and insulated steel and cast iron pipes of nominal size 15 mm to 160 mm used for transporting fluids within the temperature range -20°C to +470°C.