Marine Pipe Hanger & Support Clamp

sinofastener supplies marine pipe hangersandpipe support clamps for engine room piping systems aboard ships and offshore installations. Our pipe hangers are manufactured in accordance with MSS SP-58 (Factory-Made Wrought Steel Pipe Hangers and Supports) and MSS SP-69 (Pipe Hangers and Supports — Selection and Application), covering sizes from M20 to M64. Materials conform to ASTM A36 (Carbon Structural Steel) for standard applications and ASTM A193 Grade B7 for high-temperature or high-pressure service. All hot-dip galvanized products comply with ISO 1461. EN 10204 3.1 material certificates are provided as standard, and third-party inspection can be coordinated upon request.

What Is a Marine Pipe Hanger?

Amarine pipe hanger (also referred to as a pipe support clamporpipe hanging clamp) is a steel clamp or bracket device used to suspend, support, or restrain piping runs within a ship's engine room. Per MSS SP-58, pipe hangers are classified into several types: clevis hangers,U-bolt hangers,two-bolt clamps,one-piece clamps, and split ring hangers. Each type serves a specific function — from vertical support (carrying pipe weight) to lateral restraint (preventing thermal expansion movement).

In marine applications, pipe hangers must accommodate continuous vibration from engines and pumps, thermal cycling in exhaust and steam systems, and the corrosive environment of saltwater-laden air. Proper selection per MSS SP-69 ensures that hanger spacing, load capacity, and material grade match the piping system's operating conditions.

Marine Applications

Note: The hanger type and size recommendations below are based on typical industry practice for marine engine room piping installations. Actual selection shall be determined by the piping engineering specification and the applicable classification society rules.

Specifications & Materials

Why Choose sinofastener for Marine Pipe Hangers?

Standards Reference

• MSS SP-58 - Factory-Made Wrought Steel Pipe Hangers and Supports: Types, Materials, Dimensions, and Tolerances
• MSS SP-69 - Pipe Hangers and Supports: Selection and Application
• ASTM A36/A36M - Standard Specification for Carbon Structural Steel
• ASTM A193/A193M - Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service
• ISO 1461 - Hot Dip Galvanized Coatings on Fabricated Iron and Steel Articles — Specifications and Test Methods
• ASME B36.10M - Welded and Seamless Wrought Steel Pipe (for pipe size reference)
• EN 10204:2004 - Metallic Products — Types of Inspection Documents

FAQ

What is the difference between a clevis hanger and a U-bolt hanger?

Per MSS SP-58, a clevis hanger uses a U-shaped forged or wrought steel cradle that wraps around the lower half of the pipe, suspended by two vertical rods — it provides full vertical support and allows axial sliding for thermal expansion. A U-bolt hanger uses a bent steel rod that passes over the top of the pipe and is secured by two nuts on a base plate — it provides tighter clamping and lateral restraint. Clevis hangers are preferred for heavy pipes with thermal movement; U-bolt hangers are suitable for fixed-point support and lighter piping.

Which material should I choose for seawater piping hangers?

For seawater (ballast water / cooling water) piping, A4-80 (316) stainless steel is the standard choice per industry practice, providing pitting and crevice corrosion resistance in chloride environments. If cost is a constraint, hot-dip galvanized (HDG) per ISO 1461 on ASTM A36 carbon steel can be used in less aggressive areas, but periodic inspection is recommended. For high-velocity seawater or splash zones, duplex stainless steel or cupro-nickel clamps may be specified by the classification society.

How is hanger spacing calculated for marine piping?

Hanger spacing is determined per MSS SP-69, which provides methodology based on pipe size, pipe material weight, fluid weight, insulation weight, and allowable span between supports. The standard defines maximum allowable span as the distance at which pipe bending stress remains within acceptable limits. For marine applications, additional factors such as vessel vibration and classification society rules must also be considered.

Can sinofastener supply complete pipe hanger assemblies?

Yes. We supply complete assemblies including the hanger body (clevis/U-bolt/clamp), threaded rods, hex nuts, flat washers, and spring washers — all matched in material grade. Each assembly can be supplied with EN 10204 3.1 certificates covering all components. Third-party surveyor inspections (ABS, DNV, LR, CCS) can be coordinated upon request.