Construction

DIN 2448 Carbon Steel Pipes: SCH10-80, 6m-12m Construction

DETAILS AND PARAMETERS

TOLERANCES

TECHNICAL SHEET

What Are Carbon Steel Welded Pipes?

Carbon steel welded pipes are high-strength tubular products formed by bending carbon steel plates/coils into cylindrical shapes and joining seams via ERW (Electric Resistance Welding) or SAW (Submerged Arc Welding). Renowned for their tensile strength, impact resistance, and cost-efficiency, they excel in demanding industrial environments where durability is non-negotiable.

International Grade Portfolio

Grade	Standards	Yield Strength	Key Features
API 5L B	API 5L	248 MPa	Basic grade for low-pressure pipelines & general structures
API 5L X42-X80	API 5L	290–552 MPa	High-strength for oil/gas transmission, offshore platforms
ASTM A53 Grade A/B	ASTM A53	250–350 MPa	Versatile for water systems, scaffolding, and mechanical parts
DIN 2448 St37-St52	DIN 2448	235–360 MPa	European standard for structural and pressure

Global Size Specifications

Tailored to ASME B36.10, API 5L, and international project needs:

Outer Diameter (OD): 1/2" (12.7mm) – 63" (1600mm)
Wall Thickness: SCH10–SCH160, XS, XXS (customizable)
Lengths: Standard 6m/12m or cut-to-order (3–18m)
End Types:
- Plain End (PE) for socket welding
- Beveled End (BE) for butt welding
- Threaded End (TE) for quick connections

Heavy-Duty Applications

Trusted in 50+ countries for mission-critical projects:

Oil & Gas Sector:
- High-pressure transmission pipelines (API 5L X65/X70)
- Well casings and offshore platform structures
Water & Infrastructure:
- Municipal water supply networks (ASTM A53 Grade B)
- Sewage treatment plants and irrigation systems
Construction Industry:
- Structural columns for bridges and high-rise buildings
- Scaffolding systems and foundation piles
Industrial Manufacturing:
- Machinery shafts, conveyor supports, and heavy equipment frames
Energy Sector:
- Low-temperature pipelines in power plants and refineries

18-Year Export Expertise: Your Competitive Edge

✅ Factory-Direct Production: Cut 30% middleman costs—raw materials sourced in bulk, manufactured in our 3 state-of-the-art facilities.
✅ Rapid Turnaround:

7 days for standard grades (API 5L B, ASTM A53) from stock
20–30 days for high-strength grades (X65-X80) with custom specs
✅ Global Compliance Mastery:
Certified to API 5L, ASTM, DIN, ISO 9001, CE
Specialized in regional standards (e.g., GOST for Russia, JIS for Japan)
✅ Uncompromising Quality:
100% hydrostatic testing (up to 200 bar)
Ultrasonic and visual inspection for zero-defect weld seams
5 consecutive years with no quality-related claims
✅ End-to-End Logistics:
FOB/CIF/CFR terms via Maersk/COSCO
Full customs clearance, documentation, and door-to-door delivery

FAQ (Address Key Buyer Concerns)

Q1: How do you ensure API 5L X70 pipes meet offshore corrosion standards?
A: Our X70 pipes undergo:

Sulfide Stress Corrosion Cracking (SSCC) testing per NACE MR0175
Charpy impact testing at -20°C to ensure cold resistance

Q2: Can you supply carbon steel pipes with anti-corrosion coating?
A: Yes, we offer:

3LPE coating for oil/gas pipelines
Fusion-bonded epoxy (FBE) for water systems
Zinc-rich primer for structural applications

Q3: What is your emergency response for urgent project needs?
A: Dedicated rush order channels:

48-hour turnaround for sample approval
Express shipping via air freight for critical components

What We Deliver to Your Projects

Cost-Effective Strength: API 5L X-series pipes offer 20% higher strength-to-weight ratio than standard grades, reducing material costs.
Project Flexibility: Custom solutions for:
- Extreme climates (arctic-grade X80 for Siberian pipelines)
- High-pressure scenarios (SCH160 for refinery systems)
Risk Mitigation:
- Pre-shipment inspection reports (PSI) by SGS/BV
- 12-month warranty against manufacturing defects
Time Savings:
- Pre-cut lengths to minimize on-site fabrication
- Beveled ends ready for immediate welding

O.D.		W.T.							Length(m)
Inch	mm	Min.Yield Strength(Mpa)
Inch	mm	245(B)	290(X42)	360(X52)	415(X60)	450(X65)	485(X70)	555(X80)
16	406	6.0-14.0	6.0-13.0	6.0-12.0	6.0-11.0	6.0-10.5	6.0-10.0	6.0-9.0	6.0-12.3
18	457	6.0-15.0	6.0-14.0	6.0-13.0	6.0-12.0	6.0-11.5	6.0-11.0	6.0-10.0	6.0-12.3
20	508	6.0-16.0	6.0-15.0	6.0-14.0	6.0-13.0	6.0-12.5	6.0-12.0	6.0-11.0	6.0-12.3
22	559	6.0-17.0	6.0-16.0	6.0-15.0	6.0-14.0	6.0-13.5	6.0-13.0	6.0-12.0	6.0-12.3
24	610	6.0-18.0	6.0-17.0	6.0-16.0	6.0-15.0	6.0-14.5	6.0-14.0	6.0-13.0	6.0-12.3
26	660	6.0-19.0	6.0-18.0	6.0-17.0	6.0-16.0	6.0-15.0	6.0-15.0	6.0-14.0	6.0-12.3
28	711	6.0-20.0	6.0-19.0	6.0-18.0	6.0-17.0	6.0-16.5	6.0-16.0	6.0-15.0	6.0-12.3
30	762	7.0-21.0	7.0-20.0	7.0-19.0	7.0-18.0	7.0-17.5	7.0-17.0	7.0-16.0	6.0-12.3
32	813	7.0-22.0	7.0-21.0	7.0-20.0	7.0-19.0	7.0-18.5	7.0-18.0	7.0-17.0	6.0-12.3
34	864	7.0-23.0	7.0-22.0	7.0-21.0	7.0-20.0	7.0-19.5	7.0-19.0	7.0-18.0	6.0-12.3
36	914	8.0-24.0	8.0-23.0	8.0-22.0	8.0-21.0	8.0-20.5	8.0-20.0	8.0-19.0	6.0-12.3
38	965	8.0-25.0	8.0-24.0	8.0-23.0	8.0-22.0	8.0-21.5	8.0-21.0	8.0-20.0	6.0-12.3
40	1016	8.0-26.0	8.0-25.0	8.0-24.0	8.0-23.0	8.0-22.5	8.0-22.0	8.0-21.0	6.0-12.3
42	1067	8.0-26.0	8.0-25.0	8.0-24.0	8.0-23.0	8.0-22.5	8.0-22.0	8.0-21.0	6.0-12.3
44	1118	9.0-27.0	9.0-26.0	9.0-24.5	9.0-23.5	9.0-22.8	9.0-22.0	9.0-21.0	6.0-12.3
46	1168	9.0-27.0	9.0-26.0	9.0-24.0	9.0-23.5	9.0-22.8	9.0-22.0	9.0-21.0	6.0-12.3
48	1219	9.0-28.0	9.0-27.0	9.0-25.4	9.0-24.0	9.0-23.5	9.0-23.0	9.0-22.0	6.0-12.3
52	1321	9.0-28.0	9.0-27.0	9.0-25.4	9.0-24.2	9.0-23.5	9.0-23.0	9.0-22.0	6.0-12.3
56	1422	10.0-29.0	10.0-28.0	10.0-26.0	10.0-24.5	10.0-23.8	10.0-23.0	10.0-22.0	6.0-12.3
60	1524	10.0-29.0	10.0-28.0	10.0-26.0	10.0-24.5	10.0-23.8	10.0-23.0	10.0-22.0	6.0-12.3
64	1626	10.0-30.0	10.0-29.0	10.0-27.0	10.0-25.4	10.0-24.8	10.0-24.0	10.0-23.0	6.0-12.3
68	1727	10.0-30.0	10.0-29.0	10.0-27.0	10.0-25.4	10.0-24.8	10.0-24.0	10.0-23.0	6.0-12.3
72	1829	10.0-30.0	10.0-29.0	10.0-27.0	10.0-25.4	10.0-24.8	10.0-24.0	10.0-23.0	6.0-12.3

Tolerance of Outside Diameter and Wall Thickness

Types	Standard
Types	SY/T5040-2000	SY/T5037-2000	SY/T9711.1-1977	ASTM A252	AWWA C200-97	API 5L PSL1
Tube end OD deviation	±0.5%D	±0.5%D	-0.79mm～+2.38mm	<±0.1%T	<±0.1%T	±1.6mm
Wall thickness	±10.0%T	D<508mm, ±12.5%T	-8%T～+19.5%T	<-12.5%T	-8%T～+19.5%T	5.0mm<t<15.0mm, ±0.11="" <="" p="" style="padding: 0px; margin: 0px;">
Wall thickness	±10.0%T	D>508mm, ±10.0%T	-8%T～+19.5%T	<-12.5%T	-8%T～+19.5%T	T≥15.0mm, ±1.5mm

Chemical Composition and Mechanical Properties

Standard	Grade	Chemical Composition(max)%					Mechanical Properties(min)
Standard	Grade	C	Mn	Si	S	P	Yield Strength(Mpa)	Tensile Strength(Mpa)
GB/T700-2006	A	0.22	1.4	0.35	0.050	0.045	235	370
	B	0.2	1.4	0.35	0.045	0.045	235	370
	C	0.17	1.4	0.35	0.040	0.040	235	370
	D	0.17	1.4	0.35	0.035	0.035	235	370
GB/T1591-2009	A	0.2	1.7	0.5	0.035	0.035	345	470
	B	0.2	1.7	0.5	0.030	0.030	345	470
	C	0.2	1.7	0.5	0.030	0.030	345	470
BS En10025	S235JR	0.17	1.4	-	0.035	0.035	235	360
	S275JR	0.21	1.5	-	0.035	0.035	275	410
	S355JR	0.24	1.6	-	0.035	0.035	355	470
DIN 17100	ST37-2	0.2	-	-	0.050	0.050	225	340
	ST44-2	0.21	-	-	0.050	0.050	265	410
	ST52-3	0.2	1.6	0.55	0.040	0.040	345	490
JIS G3101	SS400	-	-	-	0.050	0.050	235	400
JIS G3101	SS490	-	-	-	0.050	0.050	275	490
API 5L PSL1	A	0.22	0.9	-	0.03	0.03	210	335
	B	0.26	1.2	-	0.03	0.03	245	415
	X42	0.26	1.3	-	0.03	0.03	290	415
	X46	0.26	1.4	-	0.03	0.03	320	435
	X52	0.26	1.4	-	0.03	0.03	360	460
	X56	0.26	1.1	-	0.03	0.03	390	490
	X60	0.26	1.4	-	0.03	0.03	415	520
	X65	0.26	1.45	-	0.03	0.03	450	535
	X70	0.26	1.65	-	0.03	0.03	585	570

Comments (2)

Katherine A. Fogg

November 25, 2024

Their products are of excellent quality and they offer generous discounts. This is their third cooperation