Stainless steel flexible hose with female cone seat thread, flat thread, and union: structure and technical specifications

General technical structure of industrial stainless steel flexible hoses

In technological piping systems, handling vibration and thermal expansion is a core challenge for design engineers. The metal flexible hose product line manufactured by Tan Dat Flex meets these requirements through the tight integration of material components.

The main body utilizes thin-walled corrugated hoses fabricated via hydraulic pressure from stainless steel grades such as SUS 304, SUS 316, or SUS 321. This corrugated profile provides flexible bending capabilities and high elasticity. To withstand high operating pressures and prevent blistering, a braided stainless steel wire layer is wrapped around the exterior to act as tensile reinforcement. Depending on the actual requirements of each installation site, engineers can flexibly choose different types of threaded connections.

Analysis of three common threaded connection types: Female cone seat thread, flat thread, and union

Selecting the correct threaded connection type directly determines the tightness and service life of the entire piping line. Below are the technical characteristics of each type for engineers to reference during design:

• Female cone seat thread: The sealing mechanism is based on the metal-to-metal contact surface. This design is highly stable under temperature and pressure, making it an optimal solution for steam or industrial gas pipelines.
• Flat thread (straight thread): Uses an additional gasket to seal between two flat surfaces. This type allows for quick assembly and installation, suitable for water supply and drainage systems or medium-pressure compressed air lines.
• Union: A flexible assembly/disassembly solution that allows engineers to perform periodic maintenance easily without twisting the hose body during tightening. This is a useful technical choice for tight spaces requiring quick operations.

Basic technical specifications and selection standards

To ensure the flexible hose operates durably, the purchasing process must be based on dimensional parameters and actual medium conditions at the facility.

Important notes for installation and maintenance of threaded stainless steel flexible hoses

Even when using high-quality materials, errors during assembly can lead to leaks or rupture of the corrugated hose. Engineers and construction teams must adhere to the following principles:

1. Avoid twisting (torsion) the hose throughout the process of tightening the threaded ends or during operation. Always keep the hose axis on a single bending plane.
2. Comply with the minimum bending radius recommended by the manufacturer to avoid deforming the corrugations.
3. Periodically check the tightness of the threaded connections, especially in systems with high vibration amplitudes such as air compressors or high-pressure pumps.

Contact for technical consultation and custom fabrication

CÔNG TY TNHH SX TM VÀ DỊCH VỤ CƠ KHÍ TẤN ĐẠT (Tan Dat Flex) specializes in manufacturing and supplying high-quality stainless steel flexible hoses and expansion joints. For detailed advice on technical specifications, choosing the appropriate thread type, or placing orders for custom fabrication according to your drawings, please contact:

Workshop address: D20/26F2 Vo Van Van, Hamlet 4A, Tan Vinh Loc Commune, Ho Chi Minh City
Hotline/Zalo: 0906 304 114
Email: khopgiannoinox.vn@gmail.com