Pipe Clamp Material & Fluid Compatibility Guide
Compare PP, PA, NBR, PVDF and metal options by fluid, temperature, concentration and operating environment.
How to use this matrix
The fluid name alone is not enough. Confirm the real operating envelope before selecting the clamp body, cushion and metal hardware.
TemperatureCheck continuous, peak and cleaning temperatures.
ConcentrationDilution and additives can change compatibility.
ExposureSeparate splash, vapour and continuous immersion.
Whole assemblyVerify body, cushion, bolts, rail and coating together.
A — Excellent, continuous service
B — Good, minor effect
C — Limited, short-term only
D — Not recommended
| Medium / Application | PP Polypropylene −20 / +100 °C | PA Polyamide (Nylon 6/66) −40 / +120 °C | NBR Nitrile rubber −40 / +100 °C Enquire | PVDF PVDF (Kynar®) −40 / +150 °C Enquire | Metal Metal (Al / Steel) −196 / +425 °C |
|---|---|---|---|---|---|
ISO VG 46/68, DIN 51524-2 | B | A | A | A | A |
oil-in-water emulsion, water glycol | A | B | A | A | B |
fire-resistant synthetic, e.g. Skydrol® | C | C | D | A | A |
| NBR is incompatible with HFD phosphate ester fluids, a known failure risk. Confirm PVDF or metal options. | |||||
≤ 220 °C | D | D | D | C | A |
| PP, PA, NBR and other polymer inserts are unsuitable for 220 °C steam. Use a project-approved metal clamp. | |||||
diesel, petrol, mineral oil | B | A | A | A | A |
e.g. 10 % HCl, dilute sulphuric acid | B | D | C | A | D |
| Dilute acids attack PA and uncoated carbon steel or aluminium. PVDF is the preferred polymer option for acid environments. | |||||
e.g. 10 % NaOH, caustic soda | A | B | B | B | D |
| Aluminium dissolves in NaOH and carbon steel also corrodes rapidly. Polymer options, commonly PP, require project confirmation. | |||||
dry or oil-lubricated, to 10 bar | A | A | B | A | A |
offshore, coastal, marine | A | B | A | A | D |
| Carbon steel corrodes rapidly in seawater. Evaluate PP, PVDF or NBR clamp bodies; all-metal assemblies should specify 316/316L stainless components. | |||||
LN₂, LNG — approx −196 °C | D | D | D | D | A |
| Polymer inserts embrittle at cryogenic temperatures. Use only a project-approved metal clamp assembly. | |||||
WRAS / NSF-61 — certified grades | A | A | A | A | D |
| Use certified material grades and verify every wetted or exposed component against the required potable-water standard. | |||||
Information to include with your enquiry
These details help us rule out unsuitable materials before quotation.
- Exact fluid or product name
- Concentration and additives
- Continuous, peak and cleaning temperature
- Splash, vapour or continuous exposure
- Pipe size, material and support load
- Outdoor, salt spray, UV and certificates
Data sources
- Calpac Laboratories — PP, PA, NBR Chemical Compatibility Charts
- Arkema / Kynar® — PVDF Chemical & Fuel Resistance Guide
- Parker Hannifin — O-Ring Handbook (ORD 5700)
- NIST Cryogenic Materials Database
- ISO 6945, DIN 3015, ASTM A333 — material temperature ratings
Ratings are screening guidance, generally at ambient temperature unless stated otherwise. Temperature, concentration, exposure time and additives can change the result. Validate the complete clamp assembly with the fluid supplier and WeiQue technical support for critical applications.