Material and series selection
- Use a project-approved metal clamp and hardware system.
- Confirm pipe surface temperature, not only steam supply temperature.
- Define fixed, guided and sliding support functions with the piping engineer.
By fluid
Steam
Saturated steam ≤ 220 °C — metal clamps only
Temperature+100 / +220 °C
Max. pressure20 bar
Standards3
Steam service is governed by temperature, thermal expansion and insulation clearance. Polymer clamp bodies and cushions are generally unsuitable at these temperatures.
Installation checks
- Provide movement allowance for thermal expansion.
- Keep clamp hardware accessible outside insulation where required.
- Review hot spots near valves, traps and reducers.
Common mistakes to avoid
- Using PP, PA or NBR at steam-line temperature.
- Restraining a line that must expand.
- Selecting hardware without checking insulation thickness.
Where this service appears
Supports must accommodate expansion between the boiler, headers and users.
Small hot lines still require metal supports and clearance from process piping.
Temperature cycles and water hammer make support placement especially important.
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 | |
|---|---|---|---|---|---|
| Steam≤ 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. | |||||
A — ExcellentB — GoodC — LimitedD — Not recommended
Full compatibility matrix Fluid variants
Saturated steam
100–220 °C, ≤ 20 bar
Standard industrial steam
Superheated steam
> 220 °C
Contact WeiQue for selection
Applicable standards
EN 13480Metallic industrial piping — design and calculationPED 2014/68/EUPressure Equipment Directive — safety requirementsISO 9606-1Qualification testing of welders — pressure equipmentComplete clamp assembly selection
| Assembly item | Selection guidance |
|---|---|
| Clamp body | Project-approved metal clamp only. |
| Support function | Define fixed, guided or sliding duty before selection. |
| Insulation | Coordinate clamp position, shoes and insulation thickness. |
| Hardware | Verify strength and corrosion resistance at operating temperature. |
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
Can a polymer clamp be used outside steam insulation?
Do not assume so. Actual clamp temperature, load path and project piping specification must be confirmed.
Why must steam supports allow movement?
The pipe expands during heating. Incorrect restraint transfers high loads into the pipe, equipment and supports.