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Carbon Steel Pipe

Seamless Steel Pipe — Carbon & Alloy Seamless Tube Manufacturer

High-quality Seamless Carbon Steel Pipe — direct from factory

✓ Direct Factory Price
✓ MOQ from 1 Ton
✓ Lead Time: 7-15 days
✓ ISO 9001 & CE Certified
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Seamless Steel Pipe — Carbon & Alloy Seamless Tube Manufacturer - Product photo 1

Product Overview

We are a leading manufacturer and supplier of Seamless Carbon Steel Pipe in China. With advanced production facilities and strict quality control, we supply products worldwide at competitive factory prices.

Specifications & Dimensions

Carbon steel seamless pipes for high-pressure, high-temperature applications including oil & gas, boilers, and structural use.

Outer Diameter 10.3 mm - 610 mm (1/4" - 24")
Wall Thickness 1.5 mm - 60 mm (Sch 40 - Sch 160)
Standard Length 6m / 12m (double random); cut to length available
Standards ASTM A53 Grade B (seamless) | ASTM A106 Grade B | API 5L Grade B / X42-X70 | ASTM A192 / A210 (boiler tube) | ASTM A519 (mechanical) | GB/T 8163 / 5310 / 3087 | EN 10210 / 10297 | DIN 2391 / 2448
Product Types Seamless Pipe (hot finished / cold drawn) · Boiler Tube (ASTM A192 / A210) · Hydraulic / Precision Tube · Line Pipe (API 5L) · Mechanical Tube (ASTM A519)
Available Grades A53 Grade B / A106 Grade B / API 5L Grade B / X42 / X52 / X60 / X65 / X70 / A192 / A210 Grade A1/C / 20# / 45# / 16Mn (Chinese grades) / St35 / St45 / St52

Standard Sizes & Weight Chart

Reference sizes and theoretical weights. Custom sizes available upon request.

Nominal SizeOD (mm)Wall (mm)WeightNote
1/2" Sch 4021.3 mm2.77 mm~1.27 kg/mA106 Gr.B, seamless
1" Sch 4033.4 mm3.38 mm~2.5 kg/mA106 Gr.B, seamless
2" Sch 4060.3 mm3.91 mm~5.44 kg/mA106 Gr.B, seamless
3" Sch 4088.9 mm5.49 mm~11.3 kg/mA106 Gr.B, seamless
4" Sch 40114.3 mm6.02 mm~16.1 kg/mA106 Gr.B, seamless
6" Sch 40168.3 mm7.11 mm~28.2 kg/mA106 Gr.B, seamless
8" Sch 40219.1 mm8.18 mm~42.4 kg/mA106 Gr.B, seamless
12" Sch 40323.8 mm10.31 mm~79.4 kg/mA106 Gr.B, seamless

Why Choose Rubao-Chinasteel as Your Supplier?

Direct Factory Price

We own our manufacturing facilities, ensuring competitive pricing without middlemen markup.

Rigorous Quality Control

Every batch undergoes 3-stage inspection: raw material, production, and final testing with full test reports.

Fast Global Delivery

Standard orders ship within 7-15 days. Well-established logistics network to major ports worldwide.

Custom Processing

Cutting, bending, welding, polishing, and surface treatment available according to your drawings.

Flexible MOQ

Minimum order from 1 ton for standard products. Trial orders welcome for new customers.

24/7 Service

Dedicated sales engineer assigned to each order. Quick response via email, phone, and WhatsApp.

Frequently Asked Questions

What sizes are available for Seamless Carbon Steel Pipe?
We supply Seamless Carbon Steel Pipe in 10.3 mm - 610 mm (1/4" - 24"). Custom sizes are also available. Contact us with your specific requirements.
What is the minimum order quantity?
Our standard MOQ is 1 ton for stock products. Custom sizes may require higher MOQ. We are flexible — contact us to discuss your needs.
What is the lead time?
Standard stock products: 3-7 days. Custom products: 7-15 days. Large quantity orders: 15-30 days. We always confirm lead time before you place an order.
Do you provide Mill Test Certificates?
Yes! Every shipment includes a full Mill Test Certificate (MTC/MTR) showing chemical composition and mechanical properties, certified to EN 10204 3.1 standard.

Ready to Get Your Quote?

Send us your specifications and quantity, and we'll reply within 24 hours with a competitive offer.

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