Pipe Clamps: Types, Materials, and Selection for Hydraulic Systems
Pipe Clamps: Types, Materials, and Selection for Hydraulic Systems
Published: August 31, 2026 Article Type: Product Knowledge Keywords: Pipe Clamp, Pipe Clamp Block, U-bolt Clamp, DIN 3015, Feiman Fluid Technology
Introduction
Loose or vibrating pipes are a leading cause of hydraulic system failure. Pipe clamps — also called tube clamps — hold hydraulic tubing firmly to the chassis or frame of a machine, dampening vibration, absorbing thermal expansion, and preventing abrasion. This article explains the main types of pipe clamps, the materials and standards that govern them, and how to select the right clamp for any hydraulic pipe routing system.
What Is a Pipe Clamp?
A pipe clamp is a mechanical fastener that grips a pipe or tube and mounts it to a structural surface. In hydraulic systems, pipe clamps typically secure carbon steel or stainless steel tubing (6 mm to 80 mm OD) along the length of an excavator boom, agricultural tractor, mobile crane, or industrial press. A typical assembly includes the clamp body (top and bottom halves), a mounting bracket or weld plate, a cover plate, and bolts that apply the clamping force.
Main Types
| Type | Typical Use | Key Feature |
|---|---|---|
| Standard Pipe Clamp Block (DIN 3015 Part 1) | Light to medium pressure lines | Two-bolt body with elastomer insert; metric 6–80 mm |
| Heavy Pipe Clamp Block (DIN 3015 Part 2) | High-pressure, high-vibration mobile machinery | Four-bolt body, higher clamping force |
| U-bolt Clamp | Exhaust, return, suction lines; retrofit | Simple U-bolt with saddle plate; low cost |
| Metal (Twin) Clamp | Parallel pipe or hose routing | Holds two equal-diameter pipes side-by-side |
| Excavator Pipe Clamp | Boom, arm, bucket cylinder pipework | Weld-plate mount integrated with OEM geometry |
| Special / Custom Clamp | Non-standard diameters or OEM footprints | Manufactured to drawing |
Materials and Surface Treatment
Clamp bodies are typically carbon steel (S235JR / Q235) for general industrial use, or 304 / 316 stainless steel for marine, offshore, food-grade, and chemical-exposed environments. Standard surface treatment is zinc plating (8–12 µm) for indoor service; zinc-nickel (Zn-Ni 12–15 % Ni) or hot-dip galvanizing provides 500+ hours of salt-spray protection for outdoor or marine service. The elastomer insert is NBR for mineral oil; FKM or EPDM is used for high-temperature or aggressive fluids.
Selection Criteria
Most hydraulic pipe clamps internationally reference DIN 3015 and SAE J1273 for hose routing, plus OEM-specific drawings. The engineer must specify outside diameter, series (light Part 1 or heavy Part 2), mounting style (weld plate, rail nut, stacking bolt, or U-bolt bracket), material and surface (to match corrosion environment), insert hardness (to handle vibration and temperature), and quantity or spacing — typically every 300–600 mm along a pipe run, plus both sides of every bend.
Application Areas
Pipe clamps are used wherever hydraulic tubing must be held secure: excavator booms, arms, and buckets; agricultural tractors routing lift and remote valve lines; mobile cranes and concrete pumps with long pipe runs spanning turret, boom, and outrigger sections; mining and drilling equipment in severe-vibration and dusty environments; and industrial machinery from machine tools to plastic injection molding machines and steel mill hydraulics.
Common Mistakes
A clamp that is too small will not grip the pipe; one that is too large will not dampen vibration. Other common errors include under-specifying corrosion protection for outdoor or wash-down environments, mixing metric and inch clamps in the same run, and failing to add clamps adjacent to every fitting or directional change — resulting in pipe fatigue, abrasion, and ultimately a hydraulic leak.
Conclusion
Pipe clamps are the silent backbone of any well-designed hydraulic system. Specified to DIN 3015, paired with the correct elastomer insert, and installed at proper intervals, they extend tube service life, reduce vibration, and simplify maintenance. Feiman Fluid Technology supplies a full pipe clamp catalog — standard and heavy series blocks, U-bolt clamps, twin metal clamps, excavator-specific clamps, and custom-engineered specials — backed by full traceability under ISO 9001:2000.
About Feiman Fluid Technology
Hebei Feiman Machinery Parts Co., Ltd. manufactures quick release couplings, hydraulic valves, hydraulic connectors, pressure test equipment, and pipe clamps for global OEM and aftermarket customers. With ISO 9001:2000 quality management, Feiman delivers reliable port-to-port fluid power solutions.
Contact: Tel: +86 15369362101 | Email: director@feimanfluid.com | Website: www.feimanfluid.com
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