Factory Direct Steel Pipes and Tubes with Competitive Prices

Rongheng supplies ERW Square Steel Tube for Curtain Wall applications where section accuracy, straightness, surface condition and outdoor corrosion protection need to be considered together. The product range covers hot-dip galvanized square and rectangular tubes, precision cold-drawn sections and precision architectural steel profiles, with Q235B, Q355B and Q355D available for different project requirements.

Rongheng Spiral Welded Steel Pipe is manufactured from hot-rolled steel strip using automatic double-sided submerged arc welding and CNC spiral forming. Available in diameters from 219 mm to 3,620 mm and wall thicknesses from 6 mm to 30 mm, it covers Q235B, Q355B and L245–L485 pipeline steel grades. The pipe is designed for large-diameter water, drainage, oil and gas, piling and infrastructure projects, with options for fixed lengths, end beveling and external corrosion protection.

Product: ERW Rectangular Steel Tube
Steel Grades: Q195, Q235, Q355 and equivalent grades
Sizes: Multiple rectangular sections and custom dimensions
Surface: Black or hot-dip galvanized
MOQ: 1 × 20-foot container, approximately 20–25 tons
Lead Time: Normally 15–25 days, depending on specification and order quantity
ERW Rectangular Steel Tube is produced by roll forming steel strip and welding the formed edges using high-frequency electric resistance welding. It is widely used for structural frames, machinery, construction, fencing and general fabrication. Rongheng supplies different section sizes, wall thicknesses, lengths and surface treatments according to project and purchasing requirements.

ERW Square Steel Tube is a high-frequency welded steel tube manufactured from hot-rolled steel strip through roll forming, ERW welding, sizing and straightening. Rongheng supplies square steel pipes in multiple sizes, wall thicknesses and steel grades for construction, steel structures, machinery and infrastructure projects. Black and galvanized surfaces, fixed lengths, custom dimensions and inspection options are available for bulk orders and engineering applications.

Rongheng supplies ERW Round Steel Pipe manufactured by high-frequency induction welding, with fast forming, accurate welding and stable mechanical performance. It is available in multiple diameters, wall thicknesses and steel grades for construction, machinery, steel structures, HVAC, automotive parts and municipal projects, with non-standard sizes and further processing available.