Marine Softwall Wet Exhaust Hose

Marine Softwall Wet Exhaust Hose is a high-performance hose specifically engineered for marine engine wet exhaust systems. The product features a three-layer construction: black nitrile (NBR) inner tube + multiple high-strength textile ply reinforcement + black nitrile (NBR) cover with wrapped finish. The unique softwall design provides excellent flexibility for easy routing and installation in tight engine compartments, while absorbing more vibration than rigid pipe or tubing. The hose offers o

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Category: Industrial Hose

Product description

Marine Softwall Wet Exhaust Hose | Black Nitrile NBR Tube | Multiple Textile Ply Reinforcement | 200°F High Temperature Resistant | Marine Engine Exhaust System Hose

Product Overview

This high-performance rubber hose is specifically designed for marine engine wet exhaust systems, widely used in yachts, commercial vessels, fishing boats, tugboats, and other marine applications.

The hose features a three-layer composite construction:

Inner Tube: Black nitrile (NBR) – excellent oil resistance and high temperature resistance up to 200°F (93°C) for hot exhaust fumes
Reinforcement: Multiple high-strength textile plies – providing superior tensile strength and durability
Cover: Black nitrile (NBR) with wrapped finish – excellent heat, oil, ozone, and weather resistance

The softwall design provides excellent flexibility for easy routing and installation in tight engine compartments. Compared to rigid pipe or tubing, this hose absorbs more vibration, reducing system fatigue risks.

Product Construction

Layer	Material	Characteristics
Inner Tube	Black Nitrile (NBR)	Oil and high temperature resistant (200°F/93°C); compatible with hot exhaust fumes and oil media
Reinforcement	Multiple High-Strength Textile Plies	Provides strength and durability; tensile and impact resistant
Cover	Black Nitrile (NBR)	Wrapped finish; heat, oil, ozone, and weather resistant

Key Features

All-Nitrile (NBR) Construction — Both inner tube and cover made of high-quality nitrile rubber, offering excellent oil resistance, heat resistance, and aging resistance – specifically designed for harsh engine compartment conditions
Multiple Textile Ply Reinforcement — Multiple high-strength textile ply reinforcement provides superior tensile strength and impact resistance, ensuring long-term stable operation under high pressure and high vibration environments
Softwall Design for Flexibility — The softwall construction provides excellent flexibility for easy routing and installation in tight spaces; absorbs more engine vibration than rigid pipe, reducing system fatigue risks
Wide Temperature Range — Operating temperature from -40°F to +200°F (-40°C to +93°C) – suitable for marine operations in all global climate conditions
High Pressure Capacity — Maximum working pressure up to 200 PSI (13.8 bar) – meets the pressure requirements of marine engine wet exhaust systems
4:1 Safety Factor — Design safety factor 4:1 ensures safe and reliable operation
Wrapped Finish — The cover features a wrapped finish process, providing a smooth and aesthetically pleasing surface while enhancing abrasion and aging resistance
Multiple Sizes Available — Inner diameter range from 1 inch to 6 inches (25.4mm to 152.4mm) – custom sizes available upon request

Technical Specifications

Parameter	Specification
Product Name	Marine Softwall Wet Exhaust Hose
Tube Material	Black Nitrile (NBR)
Reinforcement	Multiple High-Strength Textile Plies
Cover Material	Black Nitrile (NBR)
Cover Structure	Wrapped Finish
Temperature Range	-40°F to +200°F (-40°C to +93°C)
Max. Working Pressure	150–200 PSI (1.0–1.7 MPa)
Design Safety Factor	4:1
Media	Hot exhaust fumes, Oil, Water, Wet exhaust
I.D. Range	1" to 6" (25.4mm to 152.4mm)
Reinforcement Plies	2 or 4 Plies of Textile
Standard Lengths	25 ft, 50 ft (7.6m, 15.2m)
Packaging	Coil
Color	Black

Typical Parameters by Diameter (Reference):

ID (inch)	ID (mm)	OD (inch)	OD (mm)	W.P. (PSI)	W.P. (bar)
1"	25.4	1.44	36.6	200	13.8
1-1/2"	38.1	1.97	50.0	200	13.8
2"	50.8	2.56	65.0	200	13.8
3"	76.2	3.54	90.0	200	13.8
4"	101.6	4.65	118.0	150–200	10.3–13.8
5"	127.0	5.75	146.0	150–200	10.3–13.8
6"	152.4	6.61	168.0	150–200	10.3–13.8

Note: The above dimensional references are based on leading brand product data and industry general specifications. Please refer to the actual product datasheet for precise specifications.

Main Applications

Marine Engine Wet Exhaust Systems — Connection from engine exhaust manifold to hull or overboard discharge fittings
Engine Cooling Water Circulation Systems — Conveying engine cooling water
Discharge Lines — Various marine discharge line connections
Heat Exchanger Connections — Heat exchanger inlet and outlet lines
Bilge Pump Connections — Bilge water discharge
Yachts / Commercial Vessels — Exhaust systems for various boats and ships

Applicable Vessel Types: Yachts, Commercial Vessels, Fishing Boats, Tugboats, Workboats, and other marine vessels.

Important Notes & Warnings

Do not use with refined fuel — This hose is not suitable for refined fuel transfer
Do not use in hardwall/suction applications — This is a softwall product and is not designed for hardwall or suction applications
Fitting installation注意事项 — Couplings attached with bands or clamps may reduce the working pressure of the hose assembly to less than the maximum rated working pressure of the hose. Refer to NAHAD Industrial Hose Assembly Guidelines
Installation Guidance — Professional installation by qualified marine technicians is recommended to ensure compliance with industry best practices

Customization Services

We offer flexible customization services:

Diameter Customization: Available from 1" to 6" and above
Length Customization: Custom lengths available upon request
Color Customization: Black (standard); other colors available upon request
Pressure Customization: Different working pressures available for special requirements
OEM Services: Branding and label customization accepted