STAUFF Pipe Clamps

Holding a tube, pipe, hose or cable in place — and critically, absorbing the impact and vibration that flowing fluid creates before it reaches a fitting or weld. Unclamped runs work their own joints loose over time; the clamp grips the line over a broad contact area without deforming the tube.

By pipe OD: a 6–12.7 mm line takes a clamp every 1 m; 22–32 mm every 1.5 m; 88.9–102 mm every 4 m; 356–406 mm every 7.5 m. Those are maximums — go closer at bends, valves and pumps. The full table is above.

Load and vibration decide, not size alone. Standard (6–102 mm) for average load in mobile equipment and machine tools; heavy (6–406 mm) for higher load and vibration in metal plants and mining; twin (6–42 mm) for two closely placed lines. The series overlap at smaller sizes — specify the duty.

The body material = the temperature rating. Green polypropylene −30…+90 °C; black polyamide −40…+120 °C; silver aluminium up to +300 °C. A fourth option: PP with a rubber insert where a softer grip is needed.

The hardware finish code: W5 = A4 stainless (1.4401/1.4571, AISI 316/316Ti) for marine, offshore and washdown. Do not accept W4 (AISI 304) as equivalent in salt conditions. W1 untreated · W2 phosphated · W3 zinc/nickel plated.

Because each part has a different job: W10 leaves the weld plate phosphated (zinc burns off during welding anyway) while coating the rest; W11 leaves the rail nut untreated so it keeps sliding and locking in the rail. Both are deliberate specifications.

To the torque table for the series, group and body material — standard 8/10/12 Nm; heavy up to 270/450/600 Nm at 12S. Pre-tighten every bolt by hand first, then final torque. Under-torqued = body deforms; over-torqued = body breaks.

Aluminium, by far — 3.5 kN against polypropylene’s 0.6 kN at group 1. Polyamide overtakes polypropylene from group 3 upward. If load is the constraint, changing material is often cheaper than changing series. Note: no aluminium in standard groups 7–8 or the twin series.

Yes — especially on a mounting rail: weld the rail once, then add, remove or reposition clamps anywhere along it with rail nuts, without touching the structure. Base-plate installs need a new plate welded per added clamp.

Yes — identical bodies stack with stacking bolts + safety locking plates (set code SIG-AF). The locking plate between levels stops the bolts rotating; the top level takes a cover plate. Works on base plates and rails alike.

Outside diameter, always. The clamp closes around the outside of the line. A “1 inch pipe” is 33.7 mm outside, not 25.4 — and takes the 33.7 clamp. This is the most common ordering error.

Yes — held in our regional warehouses in Singapore and Malaysia, out within 24 hours of your PO. Aluminium bodies, SS316 hardware and custom accessories come to order with lead times in the quotation. Quotes within 2 working hours.