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Seamless Steel Pipe
Seamless Steel Pipe Manufacturers
Sino East Steel Enterprise, Seamless Steel Pipe manufacturers essays a large series of Seamless Steel Pipes that are broadly used in multiple home and commercial purposes. Owing to our specialization in steel manufacturing, we produce the most sinewy and resilient steel pipes. Apart from seamless steel pipes and tubes, we also offer oil pipes, ordinary seamless pipes, 3PE steel pipes, oil well casing pipes, and steel and ordinary API pipes. Sino East Steels manufactured pipes are considered as best in the industry. In our business sprint, we have become synonymous to reliability and quality.
Seamless Carbon Steel Pipe Suppliers
Seamless steel pipe is manufactured from solid round steel billets through hot rolling or cold drawing processes without any welding seam, resulting in superior pressure resistance and uniform mechanical properties. Sino East Steel supplies seamless pipes in carbon steel, alloy steel, and stainless steel grades (Q235, Q345, 20#, 45#, A106, A335, 304/316). Our seamless pipes range from 6mm to 630mm OD with wall thickness up to 50mm, serving high-pressure applications in oil & gas, petrochemical, boiler, heat exchanger, and power generation industries. All products ship with EN 10204 3.1 certification.
Applications: Oil & gas pipeline, boiler tube, heat exchanger, hydraulic cylinder, mechanical structure, chemical processing, high-pressure fluid transport.
Request a Quote for Seamless Steel Pipe →Steel Pipe Weight Chart (kg/m)
Use this weight chart to calculate steel pipe weight per meter. Formula: Weight (kg/m) = (OD - WT) x WT x 0.02466. Download our complete steel pipe weight chart for all specifications.
| Nominal Size | OD (mm) | SCH40 (kg/m) | SCH80 (kg/m) |
|---|---|---|---|
| 1/2 inch (DN15) | 21.3 | 1.27 | 1.62 |
| 3/4 inch (DN20) | 26.7 | 1.69 | 2.20 |
| 1 inch (DN25) | 33.4 | 2.50 | 3.24 |
| 2 inch (DN50) | 60.3 | 5.44 | 7.48 |
| 3 inch (DN80) | 88.9 | 8.63 | 11.80 |
| 4 inch (DN100) | 114.3 | 13.49 | 18.55 |
Note: Theoretical weights. Actual weight may vary by +/-5%. Contact us for a complete weight chart PDF with all sizes and schedules.
BS1139 Scaffolding Pipe Specifications
| Parameter | BS1139 Standard |
|---|---|
| Outer Diameter | 48.3mm +/- 0.5mm |
| Wall Thickness | 3.2mm (standard) / 4.0mm (heavy duty) |
| Length | 6.0m / 6.4m (standard), custom lengths available |
| Material Grade | S235GT / S355J2H (EN 10219) |
| Surface Finish | Hot-dip galvanized (HDG) to EN ISO 1461 |
| Zinc Coating | Minimum 55 microns (390 g/m2) |
| End Finish | Plain end / External upset / Swaged |
All Sino East Steel scaffolding pipes comply with BS1139 and EN 39 standards. Mill Test Certificates provided with every order. Contact us for scaffolding system quotations.
Galvanized Pipe vs Black Pipe: Price Comparison 2026
Choosing between galvanized steel pipe and black steel pipe? Here is a detailed price and feature comparison to help B2B buyers make the right choice for their projects.
| Factor | Galvanized Steel Pipe | Black Steel Pipe |
|---|---|---|
| Price (FOB China, Q2 2026) | $680-800/ton | $600-680/ton |
| Corrosion Resistance | Excellent - 25-50 year service life | None - requires painting |
| Best Applications | Water supply, outdoor structures, fencing | Indoor structures, painted applications |
| Welding | Requires zinc removal at weld zone | Easy, no prep needed |
| MOQ | 5 tons per specification | 5 tons per specification |
| Standards | BS1387, ASTM A53, EN 10255 | ASTM A53, API 5L |
Verdict: For outdoor or water-contact applications, galvanized pipe is the better investment despite the 10-15% higher upfront cost. For indoor structural use, black pipe offers the most cost-effective solution.
Prices are indicative FOB Tianjin for 25-ton orders. Contact us for a customized quotation based on your specifications.
2 Inch Galvanized Steel Pipe Price Per Meter (Q2 2026)
| Specification | OD (mm) | Wall (mm) | Weight (kg/m) | Price/m (USD) | MOQ |
|---|---|---|---|---|---|
| 2" SCH10 | 60.3 | 2.77 | 3.93 | $3.20-3.80 | 5 tons |
| 2" SCH40 (Standard) | 60.3 | 3.91 | 5.44 | $4.20-5.00 | 5 tons |
| 2" SCH80 (Heavy) | 60.3 | 5.54 | 7.48 | $5.50-6.50 | 5 tons |
Prices FOB Tianjin, China. Based on galvanized (Z275) coating. Bulk orders (25+ tons) receive 5-8% discount. Mixed specifications accepted in one container.
Updated: 2026-06-24 | Contact Sino East Steel for a firm quotation with your exact specifications.
BS1387 Galvanized Steel Pipe Specifications
| Parameter | BS1387 Light | BS1387 Medium | BS1387 Heavy |
|---|---|---|---|
| Outer Diameter | 21.3mm - 165.1mm (1/2" to 6") | ||
| Wall Thickness | 2.0 - 3.2mm | 2.6 - 4.0mm | 3.2 - 5.0mm |
| Zinc Coating | Hot-dip galvanized, minimum 55 microns (Z275) | ||
| End Type | Plain | Threaded (BSPT) | Threaded or Grooved |
| Length | 5.8m - 6.0m (standard), custom lengths available | ||
| Application | Water, gas (low pressure) | Water, gas, fire protection | Steam, high pressure, structural |
All Sino East Steel pipes comply with BS1387:1985 standard. Mill Test Certificates (EN 10204 3.1) provided. Equivalent standards: ASTM A53, EN 10255, JIS G3444.
BS1139 Scaffolding Tube Dimensions & Weight Chart
| Tube Type | OD (mm) | Wall (mm) | Length (m) | Weight (kg/m) | Weight/piece (kg) |
|---|---|---|---|---|---|
| Standard Ledger/Transom | 48.3 | 3.2 | 6.0 | 3.56 | 21.4 |
| Heavy Duty Standard | 48.3 | 4.0 | 6.0 | 4.37 | 26.2 |
| Light Duty Tube | 48.3 | 2.5 | 6.0 | 2.82 | 16.9 |
| Thai/SEA Standard | 48.6 | 3.2 | 6.0 | 3.58 | 21.5 |
BS1139 / EN 39 compliant. Hot-dip galvanized to EN ISO 1461. 20GP container fits approx. 1,200-1,400 pieces (standard 6m). Custom lengths and mixed specifications available.
For bulk scaffolding tube orders (1000+ pieces): contact Sino East Steel for FOB price quotation.
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hot sale ASTM seamless steel pipe
Price: US 330 USD / Ton