Instrumentation Tube Clamps: Stainless Steel & Alloy Tube Support and Mounting Clamps
An instrumentation tube clamp is a mechanical support that grips a run of rigid process or instrument tubing between two clamp-body halves and fastens it to a rail, panel, wall or structural member, immobilizing the tube against vibration, sag, thermal movement and chafing. Crestflo supplies these clamps as a US-serving manufacturer in 316/316L, duplex and nickel-alloy hardware, single, dual and multi-tube, in imperial and metric, with the clamp alloy matched to the same tubing and tube fittings you specify from us. Ready stock for standard items, made-to-order for specials, 6–8 week delivery.
What a Tube Clamp Is and What It Does
A tube support clamp holds a tube at a fixed outside diameter and transfers the load of the tube run into the mounting structure, so the tube does not resonate, deflect or wear against adjacent surfaces between supports. Because it grips on the outside diameter it works as a round tube clamp, a clamp for round tube of any wall, and as an anti-vibration, vibration-damping tube clamp that stops the run resonating; these are tube clamps for metal tube, meaning rigid stainless, alloy and carbon-steel process and instrument lines. The clamp body cradles the tube OD; a cover plate compresses the halves and a weld plate or bolted plate ties the assembly to the structure. Correctly spaced, clamps control vibration on impulse and hydraulic lines, prevent fatigue at fitting connections, and keep parallel tube banks tidy and serviceable.
On this page, "tube clamp" means an instrumentation tube-support and mounting clamp for rigid process and instrument tubing, not a hose clamp, a medical roller or pinch tubing clamp, a woodworking or pipe bar clamp, or a structural round-tube connector.
Buyers also specify this component as a tubing clamp, tube support clamp, tube mounting clamp, tube clamp bracket, tube clamp holder or tube clamp block; a single, twin or gang assembly is often called a tube clamp assembly. On accessory line cards it is listed among pipe and tube clamps, a tube pipe clamp, though it grips rigid tube only; bar-style and threaded pipe clamping falls outside its scope. As mounting hardware it is distinct from joining tube clamp fittings: a clamp supports the tube, while a fitting joins or terminates it.
Tube Clamp Types: Single, Dual (Twin) & Multi-Tube Configurations
Configuration is set by how many tubes each clamp carries and how the cover plate is bolted:
| Configuration | Tubes held | Cover-plate bolts | Typical use |
|---|---|---|---|
| Single tube clamp | 1 | Single or two-bolt | Individual impulse, instrument or hydraulic line |
| Dual / twin tube clamp | 2 | Two-bolt cover plate | Paired supply/return or dual impulse lines |
| Multi-tube (gang / bank / bundle) clamp | 3+ | Bolted plate over stacked halves | Tube banks, bundles, manifolds, skid tube routing |
Single, twin and multi-tube clamps stack on a common rail to build organized banks of tubing, and ship as bolted assemblies with matched cover-plate, weld-plate and bolt hardware as standard, with quick-release tube clamp styles available on request. Configuration and hardware are customizable to requirement.
DIN 3015 Series & Load Class: Standard, Heavy Duty & Twin
Instrumentation tube clamps follow the DIN 3015 family of designations, the standard published spec for this clamp type:
- DIN 3015 Part 1, standard / light series, for general routing and lower vibration.
- DIN 3015 Part 2, heavy series, for heavy-duty tube clamps on high-vibration, high-load or offshore duty.
- DIN 3015 Part 3, twin series, a compact double-body arrangement.
Series selection follows the load, vibration and clamp-spacing of the run; values are per the applicable standard and customizable to requirement. See the instrumentation fitting standards overview for the wider standards context.
Tube Clamp Anatomy: Clamp Body, Cover Plate, Weld Plate & Bolts
A complete tube clamp assembly comprises the clamp body (the two clamp halves or "blocks" that cradle the tube), a cover plate (also called a top plate) that compresses the halves, a weld plate or bolted mounting plate that fixes the assembly to the structure, and the bolt set that draws it together. Naming each element lets you order a matched kit, clamp halves, plate and bolts, rather than loose parts.
Tube Clamp Sizes: Imperial (1/8″–2″ OD) & Metric
Clamps are sized to the tube outside diameter and supplied in both imperial and metric, matched to the Crestflo tube range up to 2″ / 50 mm OD. Representative instrumentation ODs:
| Tube OD (in) | Tube OD (mm) | DIN 3015 series |
|---|---|---|
| 1/8″ | 3 mm | Light |
| 1/4″ | 6 mm | Light |
| 3/8″ | 10 mm | Light |
| 1/2″ | 12 mm | Light / Heavy |
| 5/8″ | 16 mm | Light / Heavy |
| 3/4″ | 20 mm | Heavy |
| 1″ | 25 mm | Heavy |
| 1‑1/2″ | 38 mm | Heavy |
| 2″ | 50 mm | Heavy |
Sizes are per applicable standard OD tables and customizable to requirement. Match the clamp to your tube OD using the tubing size chart; for the tube itself see instrumentation tubing.
Stainless Steel Tube Clamp Materials: 316/316L, Duplex, Super Duplex & Nickel Alloys
Crestflo supplies stainless steel tube clamps in 304/304L and 316/316L as standard, with duplex, super duplex and nickel-alloy upgrades on request. The metal hardware, weld plate, cover plate and bolts, is matched to the tube alloy and the environment:
| Component | Standard material | Alloy upgrades | Bar spec |
|---|---|---|---|
| Cover plate / weld plate | 304/304L, 316/316L stainless | Duplex 2205, Super Duplex 2507, 904L, Alloy 20, Monel, Inconel | ASTM A276 / A479 |
| Bolts / hardware | 304/316 stainless | Duplex, nickel alloys on request | ASTM A276 / A479 |
| Clamp body | Polymer clamp halves, polyamide (nylon) / polypropylene, PA / PP per DIN 3015 practice | Stainless metal bodies for high-temperature service, on request | DIN 3015 |
The important rule for corrosive and marine service: match the clamp-hardware alloy to your tube alloy to avoid galvanic corrosion at the support, a 316L tube run wants 316L or higher clamp hardware, and a sour-service duplex or nickel line wants matching CRA hardware. Grades follow published compositions and are customizable to requirement; learn more on the instrumentation fitting materials hub, 316/316L and 304/304L. Machined stainless hardware conforms to ASTM A276 and ASTM A479 bar-stock specs. Finish options include material finish, electropolish, passivation and silver anti-galling plating.
Tube Clamp Mounting Methods: Weld Plate & Bolt-On Rail
Two mounting methods cover most installations. A weld-plate (weldable) clamp is welded to a beam, bracket or skid frame; a bolt-on plate is fixed to a drilled rail or panel. Multiple clamps stack on a common mounting rail to carry banks of tubing. The clamp is compatible with standard rail and bracket practice, and mounting hardware is customizable to requirement. Mounting and clamping hardware pairs with our tube installation tools; for spare joining hardware see spare ferrules & nuts.
Applications: Impulse, Hydraulic & Analyzer Tube Runs
Instrumentation and hydraulic tube clamps secure impulse and instrument tube runs, hydraulic tube lines, analyzer and sample lines, and vibration-prone skid and offshore tubing. Heavy-series alloy clamps are specified where vibration, salt-laden air or sour media rule out plated-steel hardware. See oil & gas, offshore and the full industries list, and pair clamps with hydraulic tubing runs.
Certifications, Traceability & Quality
Crestflo is ISO 9001 / 14001 / 45001 & PED certified. Every metal part carries a heat/lot number for full traceability, with EN 10204 MTC 3.1 supplied as standard and 3.2 on request. Alloy hardware is verified by PMI, supported by in-house NDT, destructive testing at ISO/IEC 17025-accredited laboratories, and third-party inspection on request. Alloy hardware can be supplied to NACE MR0175 / ISO 15156 for sour service. Certificate documents are available through our material traceability page; origin and compliance are covered on US origin & compliance.
Why Crestflo for Tube Clamps
Crestflo is the instrumentation division of a four-decade-old, Government-of-India-recognized export house with a long Middle-East delivery track record, depth of manufacturing behind a focused US-serving instrumentation line. The single-source advantage is real: your tube clamp hardware ships in the same certified alloy as the Crestflo tubing and tube fittings it supports, with matching material certificates. Add imperial and metric sizing, small MOQ, private-label options, and a 6–8 week lead time against the 20-plus weeks typical of the majors. Indian origin; US / European melt available on request, with full material traceability. We Engineer Confidence.
Ready to specify? Request a quote with your configuration, tube OD, series and alloy, or ask our distributor team for the line card. Datasheets and CAD are available to customers on request; request your ordering-code guide from our engineering team.
Frequently Asked Questions
What is a tube clamp used for?
A tube clamp secures and supports a run of instrument or process tubing against a rail, panel or structure, controlling vibration, sag and chafing between tube supports so connections do not fatigue and fail.
What are the different types of tube clamps?
By tube count they are single, dual (twin) and multi-tube (gang) clamps. By load series they follow DIN 3015 light/standard, heavy and twin series. By mounting they are weld-plate or bolt-on plate clamps.
What are the three types of clamps offered here?
Single-tube, twin/dual and multi-tube gang clamps, each available in a light or heavy DIN 3015 series to suit the load and vibration of the run.
Is a tube clamp the same as a hose clamp?
No. A tube clamp supports rigid tubing at a fixed outside diameter; a hose clamp (worm-gear or band type) tightens around flexible hose. The clamps here are rigid-tube support and mounting hardware only.
What sizes do the tube clamps fit?
Instrumentation outside diameters in both imperial and metric, matched to Crestflo tubing up to 2″ / 50 mm OD. See the size table above and cross-check the tubing size chart; sizes are per applicable standard and customizable to requirement.
What materials are the tube clamps made from?
Metal hardware, weld plate, cover plate and bolts, in 304/304L and 316/316L as standard, and on request duplex, super duplex or nickel alloys; polymer clamp bodies per DIN 3015 practice, with metal bodies for high temperature on request. Match the clamp alloy to your tube alloy to avoid galvanic corrosion.
Are the tube clamps NACE-compliant for sour service?
Yes. Alloy hardware can be supplied to NACE MR0175 / ISO 15156 for sour service, in matching CRA grades to the tube run.
Do the tube clamps come with a material test certificate?
Yes. Every metal part is heat/lot-number marked and supplied with EN 10204 MTC 3.1 as standard, and 3.2 on request.
How do I mount a tube clamp?
Weld the weld-plate to the structure, or bolt the plate to a drilled rail or panel; stack multiple clamps on a common rail to carry banks of tubing.
What is a tube clamp versus a tube fitting?
A clamp supports and holds the tube in place; a fitting joins or terminates it. For unions, elbows and connectors that join tube, see the tube fittings range.
What is the lead time and minimum order?
Ready stock for standard items, made-to-order for specials, and 6–8 week delivery, with small MOQ and private-label options.
Where are the tube clamps made?
Indian origin, US-serving, with US / European melt available on request and full material traceability. TAA eligibility is handled on our US origin and compliance page.