Material and series selection
- Provide the chemical name, concentration and safety data sheet.
- Evaluate PVDF for many acid environments and PP for many alkalis.
- Confirm every component, including bolts, rail and coatings.
By fluid
Aggressive Chemicals
Acids · Alkalis · PVDF or PP inserts recommended
Temperature−20 / +60 °C
Max. pressure10 bar
Standards3
Chemical compatibility depends on the exact chemical, concentration, temperature, exposure duration and additives. Generic acid or alkali labels are not enough.
Installation checks
- Differentiate vapour, splash, washdown and continuous immersion.
- Account for cleaning chemicals and upset concentrations.
- Provide inspection access for cracking, swelling and corrosion.
Common mistakes to avoid
- Selecting from pH alone.
- Ignoring concentration and temperature changes.
- Checking the clamp body but not the metal hardware.
Where this service appears
Concentration changes and leakage exposure make exact chemical data essential.
Cleaning temperature and strong alkali can attack unsuitable metals.
A clamp may face several chemicals from vapour, splash and washdown.
Material compatibility
| PPPolypropylene−20/+100 °C | PAPolyamide 6/66−40/+120 °C | NBRNitrile rubber−40/+100 °C | PVDFPVDF (Kynar®)−40/+150 °C | MetalMetal (Al/Steel)−196/+425 °C | |
|---|---|---|---|---|---|
| Aggressive chemicals — acide.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. | |||||
| Caustic alkalie.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. | |||||
A — ExcellentB — GoodC — LimitedD — Not recommended
Full compatibility matrix Fluid variants
Dilute acids
10 % HCl, dilute H₂SO₄, pH < 4
PVDF is preferred insert
Caustic alkalis
10 % NaOH, caustic soda
PP preferred; metal rating D
Solvents / mixed
Consult compatibility table
Check specific chemical
Applicable standards
REACH EC 1907/2006Registration, Evaluation, Authorisation of ChemicalsEN 13480Metallic industrial piping — chemical requirementsISO 14692Glass-reinforced plastic piping for chemical serviceComplete clamp assembly selection
| Assembly item | Selection guidance |
|---|---|
| Clamp body | Select from exact chemical data; PVDF or PP are common starting points. |
| Hardware | Verify bolts, rail, plates and coatings separately. |
| Mounting | Avoid chemical traps and provide washdown drainage. |
| Inspection | Make cracking, swelling, discoloration and corrosion easy to see. |
Recommended series
Related technical resources
Pipe clamp selection guideCheck OD, load, vibration, material and mounting method before specifying.Read guide Pipe clamp spacing guidePlan supports around bends, valves, pressure pulses and equipment vibration.Read guide Pipe clamp material guideCompare PP, PA, NBR, metal and stainless choices by fluid and environment.Read guide DIN 3015 standard guideUnderstand standard, heavy and twin clamp families for industrial pipework.Read guide
Details needed for a reliable recommendation
Send these operating details with your enquiry so the complete clamp assembly can be reviewed.
- Exact fluid/product name and concentration
- Continuous, peak and cleaning temperatures
- Pipe OD, material, wall thickness and quantity
- Pressure, pulsation, vibration and support load
- Indoor/outdoor exposure, salt, UV and washdown
- Required standards, certificates and mounting method
Frequently asked questions
Is pH enough to choose a clamp material?
No. Chemical identity, concentration, temperature, additives and exposure duration are also required.
Why check external exposure if fluid stays inside the pipe?
Leaks, vapour, washdown and nearby processes can expose the clamp assembly.