Hollow Section Galvanized Welded Steel Pipes for Structural and Fluid Delivery Applications

Hollow Section Galvanized Welded Steel Pipes for Structural and Fluid Delivery Applications

1．Product Overview

Hollow section galvanized welded steel pipes are used for structural frames, construction supports, fluid delivery, mechanical fabrication, greenhouse structures, fencing, guardrails, and general engineering applications.

The pipe is produced by ERW welding technology and can be supplied as hollow section or welded steel pipe according to project requirements. Galvanized surface treatment improves corrosion resistance for outdoor and humid environments, while oiled or black surface options are suitable for further fabrication, welding, or painting.

2．Technical Solution

The production process forms steel strip into pipe or hollow section shape, then completes longitudinal welding through the ERW process.

Galvanized coating provides surface protection for construction and outdoor applications. Oiled and black surfaces are available when temporary rust protection or further processing is required.

Different end treatments can be arranged according to application needs, including plain ends, beveled ends, threaded ends with couplings or sockets, plastic caps, and steel rings.

3．Specifications

4．Application

This product is suitable for construction structures, steel frames, columns, supports, handrails, fencing, guardrails, greenhouse frames, pipe supports, machinery frames, welded components, and general engineering structures.

For fluid delivery applications, it can be used for water, gas, steam, combustible fluids, and other compatible low-pressure transportation systems according to the required standard and project specification.

5．Processing

The pipe supports cutting, welding, threading, beveling, galvanizing, painting, 3PE coating, bundling, and container loading.

Inspection can be arranged according to order requirements, including dimensional inspection, visual inspection, chemical composition inspection, mechanical property testing, and nondestructive inspection.

6．Advantages

• ERW production supports stable dimensional control and continuous pipe manufacturing.
• Galvanized surface treatment improves corrosion resistance for outdoor construction and humid environments.
• Multiple standards are available for structural, fluid delivery, and general fabrication applications.
• Plain, beveled, and threaded end options support different installation and connection methods.
• A wide size range supports construction, industrial fabrication, agriculture, infrastructure, and general engineering projects.
• Export packing options support container shipment, bulk loading, and project-based delivery.

7．How to Choose

• Choose galvanized welded pipe for outdoor structural use and humid environments.
• Choose GB/T3091 or ASTM A53 when the project is focused on fluid delivery.
• Choose GB/T6728 or GB/T6725 when square or rectangular hollow section is required for structural use.
• Choose oiled surface when temporary anti-rust protection is needed.
• Choose black or bared surface when the pipe will be welded, painted, or further fabricated.
• Choose threaded ends with couplings or sockets when mechanical connection is required.
• Choose 3PE coating when higher external corrosion protection is required.

8．FAQ

Q1．What standards are available

GB/T13793, GB/T3091, GB/T6728, GB/T6725, ASTM A53, BS1387, DIN2244 and related standards are available.

Q2．What surface treatments can be supplied

Galvanized, oiled, black, color painted, 3PE, or other anti-corrosive treatments are available.

Q3．What is the available length

Standard length is 5.8M or 6M, and customized length below 16M can be supplied.

Q4．Can threaded ends be supplied

Yes. Plain, beveled, and threaded ends with couplings or sockets can be supplied.

Q5．What are the main applications

The product is used for water, gas, steam, combustible fluid delivery, structural frames, construction supports, fabrication, agriculture, infrastructure, and general engineering.

Wuxi Raymond Steel Co., Ltd. was founded in Oct., 2000, with total investment of 25 million U.S Dollars, which is a large-scale iron and Steel enterprise specialized in producing hot-rolled and cold-rolled steel strip.

Wuxi Raymond Steel Co., Ltd. is situated in the region of Shitangwan Industrial Park, the Northwest Suburb, and WuXi with advantageous geographical position and convenient communication. Hu- Ning Express Way is on the north and Hu-Ning Railway, Jing-Hang Canal, No. 312 National way are on the south and Xi—Cheng Canal is on the east. The land area of the company is more than 300, 000 M2, in which, the building area is 100, 000 M2. There are 450 workers and staff members, including 75 various engineers, technicians and administrators with senior professional titles.

The main production equipment includes one advanced hot-rolled steel strip production line; 450cold- rolled steel strip reversible rolling mills； 12 acid-washing production line；auto-control cuting machine vertically and horizontally；24 sets of PC control fading-fire bright fnish facility, With advanced equipments and excellent technology we have an annual output of 350, 000 tons hot-rolled steel strip and 250, 000 tons cold-rolled steel strip. The main grade Of our products includes： carbon steel (Q195、Q215、Q235), Structural alloy steel, silica steel and stainless steel.

The production lines of hot-rolled steel strip adopted the international advanced continuous rolling technique. The machine set adopted the advanced technology and equipments, such as all-digital and all- network technology control and electric closed loop. The electrical controlled system adopted the up-to- date SIEMENS S7-400 PLC Artificial Intelligent control system it not only satisfied the craft demand of on-the-spot production, but also provided flexible and convenient man-machine operation interface for productive operation. The DCS plan organized by computer network fully reflected the thinking of modern computer control of decentralized control and centralized management.