JIS G3454 is a technical specification for carbon steel resistance welded steel pipes used in pressure equipment in the Japanese Industrial Standards (JIS). It is mainly applicable to medium and low pressure pressure bearing systems with temperatures not exceeding 350°C. Its resistance welded steel pipes (ERW) are mainly used in the following fields:
1. Oil and Gas Industry
a.Application Scenarios:
Oil and Gas Transmission Pipelines: Used in pipeline systems for the transportation of low-pressure natural gas, crude oil, or refined oil products.
Oil Well Casing: Casing or surface casing for certain low-pressure oil wells.
Refining and Chemical Processing Equipment: Low-pressure process pipelines in refineries and chemical plants.
b.Advantages:
Lower Cost: Compared to seamless steel pipes, electric resistance welded (ERW) steel pipes offer more competitive pricing.
High production efficiency: Suitable for large-scale production, meeting the requirements for long-distance pipeline laying.
2. Chemical and Energy Industry
a.Application Scenarios:
Chemical Equipment Piping: Piping used for transporting water, steam, and weakly corrosive media.
Boiler Auxiliary Piping: Low-pressure steam piping and condensate recovery systems.
Heat Exchanger Tube Bundles: Outer shells or support structures for some low-pressure heat exchangers.
b.Material Requirements:
Typically, STPG370 or STPG410 grades are used to ensure sufficient strength and pressure resistance.
3. Construction and Infrastructure
a.Application Scenarios:
Building Structure Pipes: Support columns, trusses, etc. for some steel structure buildings.
Municipal Pipes: Water supply, drainage, and fire protection pipe systems (must meet anti-corrosion requirements).
b.Features:
Good Welding Performance: Easy to weld and install on site.
Wide Range of Sizes: Outer diameter 10.5 mm to 660.4 mm, suitable for different engineering needs.
4. Mechanical Manufacturing and Automotive Industry
a.Application Scenarios:
Hydraulic System Piping: Piping for some low-pressure hydraulic cylinders or transmission systems.
Automotive Exhaust System: Low-pressure exhaust pipes or bracket structures for some vehicle models (requires high-temperature treatment).
b.Processing Adaptability:
Can be adapted to different mechanical structure requirements through secondary processing such as cold bending and flaring.
5. Shipbuilding and Marine Engineering
a.Application Scenarios:
Ship boiler auxiliary pipes: low-pressure steam or hot water circulation systems.
Ship structural pipes: ventilation and drainage pipes in some compartments.
b.Special Requirements:
Some applications require additional galvanization or anti-corrosion coating treatment to improve seawater corrosion resistance.
Summary
JIS G3454 Electric Resistance Welded Steel Pipes (ERW) are primarily used in medium- and low-pressure pressure systems. Their advantages include low cost, high production efficiency, and a wide range of sizes. However, in high-pressure, high-temperature, or highly corrosive environments, seamless steel pipes or higher-grade materials (such as JIS G3458 alloy steel pipes) are typically required. When selecting a pipe type, comprehensive evaluation should be conducted based on pressure ratings, medium characteristics, and welding process requirements.
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