What standards do your Seamless Steel Pipe products meet?

Our Seamless Steel Pipe products comply with ASTM, BS, JIS, and GB international standards. All products come with mill test certificates and third-party inspection is available upon request.

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Standard

AISI (20)
ASME (233)
ASTM (625)
BS (225)
DIN (232)
EN (156)
GB (265)
JIS (93)

Type

Carbon Structural Steel (65)
Equal (162)
Heavy (292)
Light (141)
Plate (140)
Round (508)
Spring Steel Bar (57)
Steel Coil (71)

Grade

200 Series (16)
300 Series (38)
400 Series (87)
HRB400 (240)
Q195 (410)
Q235B (569)
Q345 (274)
SS400 - SS490 (119)

Applications

Boiler Plate (31)
Construction (406)
Container Plate (127)
Manufacturing (621)
Railway Rail (46)
Steel Fabricated House (146)
Steel Workshop (202)
Structure Pipe (152)

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 steel pipes are the important type of pipes and tubes required largely in multiple homes and commercial purposes. They are ideal to ensure sufficient water supply without possibility of any leakage. They are ideal for oil supply, gas supply and various other purposes. Large construction sites and various commercial applications need such pipes in bulk and they look for reliable and famous seamless steel pipe manufacturers and suppliers.

Seamless Carbon Steel Pipe Suppliers

If you are looking for a new range of strong and durable pipes, you have come at the right and one of the popular seamless steel pipe manufacturers. Sino East Steel Enterprise is certified and reputed manufacturer and supplier of seamless steel pipes and a variety of other topes and tubes for various industrial applications. These pipes are of premium quality and made by following all the quality and safety guidelines. We deliver them worldwide at wholesale prices. Our prices are reasonable and will be lower than others. Manufacturer’s warranty is an added advantage that will ensure that you are getting the best quality at competitive prices. We have these pipes in different measurements that you can choose according to your choice.

Please go through our selection of available seamless steel pipes and tubes and place your order.

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.

✓ No welding seam — superior pressure resistance

✓ Cold drawn or hot rolled finishing available

✓ Standards: ASTM A106, A335, API 5L, GB/T 8162/8163

✓ OD from 6mm to 630mm, WT up to 50mm

✓ Full NDT testing: UT, ET, hydrostatic testing

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: 2026-07-17 | 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.

Suggesting that these directories not increase product, please contact us or leave us a message.

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