Pipe Saddle Clamps For BS3974 Pipe - Grip / Anchor and Non-Grip / Guide Types. Various materials and sizes

Pipe Saddle clamps

Pipe saddle clamps are used to clamp a pipe to a flat surface – traditionally of two styles, grip type (anchor) or non-grip type (saddle / guide). The clamp will have two holes to allow fixing bolts to fasten the clamp to a wall, floor, wooden joist etc

Grip or Anchor clamp

Grip clamps, sometimes called anchor clamps are used when the pipe requires a tight clamping to restrict all movements

Non-Grip or Saddle / guide clamp:

Non-Grip clamps, sometimes called guide clamps areused when it is desirable to have a looser fit to allow some movement. Movement could be thermal or mechanical (perhaps a vibration). Below is a representative image showing a gap between the pipe and the clamp. Realistically there would likely be contact at the top surface.

Dimensions in millimeters (mm)

Anchor / Grip Saddle Clamps - Light Duty (1223 Series)

Anchor / Grip Saddle Clamps - Heavy Duty (1225 Series)

Guide / Non-Grip Saddle Clamps - Light Duty (1222 Series)

Guide / Non Grip Saddle Clamps - Heavy Duty (1224 Series)

Materials:

A4 (T316) Marine grade stainless steel has a greater corrosion resistance than A2 in certain environments. It is often used for Marine applications especially when coming into direct contact with salt water.

A2 (T304) stainless steel has good resistance to corrosion except in severe industrial and Marine Condition. Use A4 in a marine environment.

BZP - Bright Zinc Plated (Grade 8.8) - A 3 micron plating is applied to the steel to give a shiny finish. Although it does afford some protection this is best suited to an indoor use.

Galvanised (Grade 8.8) - A duller finish than BZP, typically 50 microns thick covering of Zinc and therefore provides much more protection suitable for many out door applications. To allow for this layer you should use tapped oversized nuts

Other Details:

The inside diameter of a clamp is very often less than the inside height and this can cause confusion. The idea is that the clamp does NOT sit flush against the wall. Having less inside height means the saddle will sit proud on top of the pipe with a gap to the wall. Then as you tighten the fixing bolts the plate bends slightly towards the wall and so produces the clamping effect on the pipe. If the clamp fit flushly to the wall as soon as you address it to the pipe, then it simply would not grip the pipe sufficiently.