Jacketed Metal Hose

Updated: 2026-09-16

Overview

Jacketed metal hoses are essential components in industrial piping systems, designed to provide flexibility while maintaining durability in demanding environments. These hoses consist of an inner corrugated metal tube for flexibility, surrounded by a protective outer metal jacket that shields against external damage. They are widely used in petrochemical, power generation, and manufacturing industries where rigid piping cannot accommodate movement or vibration. The jacketed design offers superior protection compared to standard metal hoses, making them suitable for applications involving abrasion, mechanical stress, or extreme temperatures. Their construction allows for thermal expansion and contraction while maintaining system integrity, preventing leaks and ensuring long-term reliability in critical operations.

Structure and Working Principle

The jacketed metal hose features a multi-layer construction that combines flexibility with strength. The inner core is typically a corrugated stainless steel tube that allows for movement and vibration absorption. This is surrounded by a metal braid or solid jacket that provides crush resistance and protects against external damage. Some designs may include additional layers for specific performance requirements. When in operation, the hose accommodates axial, lateral, and angular movements while containing the media under pressure. The corrugations enable flexibility while maintaining strength, and the outer jacket acts as a barrier against physical damage and environmental factors. This construction makes the hose particularly effective in applications where both flexibility and protection are required.

Key Features

Jacketed metal hoses offer several distinctive features that make them valuable in industrial applications. Their temperature resistance typically ranges from -200°C to +600°C, depending on the materials used, making them suitable for extreme environments. Pressure ratings can reach up to 100 bar or more for certain models, with the outer jacket providing additional burst protection. These hoses are highly resistant to corrosion, especially when made from 316 stainless steel, which is ideal for chemical applications. The jacketed design provides excellent abrasion resistance, significantly extending service life in harsh conditions. Unlike rubber hoses, they won't degrade from UV exposure or ozone, making them suitable for outdoor applications with long-term reliability requirements.

Application Areas

Jacketed metal hoses find extensive use across multiple industries due to their robust characteristics. In the petrochemical sector, they're employed for transferring aggressive chemicals and hydrocarbons where both flexibility and containment are critical. Power plants utilize them for steam lines and high-temperature fluid transfer, where their heat resistance prevents system failures. Manufacturing facilities rely on these hoses for pneumatic conveying systems and equipment connections that require vibration dampening. They're also common in shipbuilding for fuel and hydraulic lines, where saltwater corrosion resistance is essential. Other applications include semiconductor manufacturing, food processing (with appropriate material grades), and aerospace industries where reliability under extreme conditions is paramount.

Maintenance and Precautions

Proper maintenance of jacketed metal hoses ensures optimal performance and longevity. Regular inspections should check for signs of wear, corrosion, or damage to the outer jacket, which serves as the first line of defense. While the hoses are durable, they should be protected from excessive torsion or bending beyond their specified minimum radius. Installation requires careful attention to avoid kinking or over-extension. Support the hose properly to prevent undue stress on connections, and ensure it's not subjected to twisting forces during operation. When used with vibrating equipment, allow sufficient length for movement absorption. For critical applications, consider implementing a replacement schedule based on service hours or operational cycles to prevent unexpected failures.

B2B Procurement Guide

When procuring jacketed metal hoses commercially, several factors require careful consideration. Specify the exact inner diameter needed for proper flow rates, keeping in mind that larger diameters may require custom manufacturing. Clearly define the pressure and temperature ratings required for your application, including any peak conditions that may occur during operation. Material selection is crucial - 304 stainless steel offers good general corrosion resistance, while 316 provides superior protection against chlorides and harsh chemicals. Consider end connection types (flanges, threaded, etc.) and ensure they match your existing piping system. For large orders, request samples to verify quality and performance before full-scale procurement. Lead times can vary significantly for specialized configurations, so plan purchases accordingly to avoid project delays.