Factory Customized 3PE Anti-Corrosion Spiral Welded Steel Pipe

• Customization: Available
• After-sales Service: 24h Online
• Warranty: 1 Year
• Model NO.: 37mn/30CrMo/35CrMo/Sth11/Sth12/Sth21/Sth22/4130X
• Type: Seamless/Welded
• Technique: Hot/Cold Rolled,Cold Draw,ERW,Saw,Efw,Extrude
• Material: Carbon,Stainless,Alloy
• Surface Treatment: Black/Varnishing/Polished/Oiled/Galvanized
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Payment: T/T L/C
• Certificate: CCS, ABS, BV API, ISO9001
• Thickness: 0.4~8mm, Customizable
• Length: 1000~6000mm, Customizable
• Width: Customizable
• Delivery Time: at Stock or 7-15 Days According to The Quantity
• Grade: 201 202 304 304L 310 310S 316 361L
• MOQ: Low MOQ
• Secondary or Not: Non-Secondary
• Sample: Provide
• Standard and Grade-01: API 5L/ASTM A106, Grade B;ASTM A53, Gr.a, Gr.B
• Standard and Grade-02: ASTM A519 JIS G3429
• Standard and Grade-03: 37mn/30CrMo/35CrMo/Sth11/Sth12/Sth21/Sth22/4130X
• Transport Package: Neutral Standard Export Seaworthy Packing
• Specification: As Requirement
• Trademark: Tongno
• Origin: Wuxi China
• Production Capacity: 200, 000 Ton/Year

Product Description

Product Description

Seamless steel tubes for gas cylinders are seamless steel tubes suitable for manufacturing gas cylinders and accumulator shells.

Standard:
GB/T 18248 -- China National Standard
Q/321088HGB3 -- Enterprise standard of Jiangsu Chengde Steel Pipe Co.
ASTM A519 -- American Society for Testing and Materials (ASTM) Standard
JIS G3429 -- Japanese Industrial Standard
DOT49CFR178.37 -- U.S. Department of Transportation (DOT) Standards

Main production steel pipe grades:  37Mn,30CrMo,35CrMo,STH11,STH12,STH21,STH22,4130X

Uses:  For the manufacture of gas cylinders with hot-rolled large diameter seamless steel pipe 

Dimensional tolerances:

Pipe Types	Diameter(D)		Wall thickness(S)
	Outer diameter of steel pipe(mm)	Permissible deviation(mm)	Wall thickness of steel pipe(mm)	Permissible deviation(mm)
Hot Rolled Pipe	φ559	±1.0%	17	-0%,+25

Chemical composition:

Standard	Grade	Chemical Components(%)
		C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V
Q/321088HGB3	4130X	0.25~0.35	0.15~0.35	0.40~0.90	≤0.020	≤0.010	0.80~1.10	≤0.25	≤0.20	0.15~0.25	≤0.08
GB/T 18248	37Mn	0.34~0.38	0.10~0.35	1.35~1.75	≤0.020	≤0.010	≤0.30	≤0.30	≤0.20	-	-
	30CrMo	0.26~0.33	0.17~0.37	0.40~0.70	≤0.020	≤0.010	0.80~1.10	≤0.30	≤0.20	0.15~0.25	-
	35CrMo	0.32~0.40	0.17~0.37	0.40~0.70	≤0.020	≤0.010	0.80~1.10	≤0.30	≤0.20	0.15~0.25	-
JIS G 3429	STH11	≤0.50	0.10~0.35	≤1.80	≤0.035	≤0.035	-	-	-	-	-
	STH12	0.30~0.41	0.10~0.35	1.35~1.75	≤0.030	≤0.030	-	-	-	-	-
	STH21	0.25~0.35	0.15~0.35	0.40~0.90	≤0.030	≤0.030	0.80~1.20	≤0.25	-	-	-
	STH22	0.33~0.38	0.15~0.35	0.40~0.90	≤0.030	≤0.030	0.80~1.20	≤0.25	-	-	-

 

Detailed Photos

 

Certifications

 

Packaging & Shipping

1.Export sea worthy package + water proof paper
2.Safe loading and fixing Professional teams

Delivery Detail: within 7-10 working days after receiving the deposit or according to your order quantity.

Company Profile

Wuxi Tongno Special Steel Co., Ltd. was founded in 2013, the registered capital of 5 million yuan, for the professional production of seamless steel pipe manufacturing enterprises; after years of rapid development, Wuxi Tongno Special Steel Co., Ltd. now has three types of seamless steel pipe production line;

Wuxi Tongno Special Steel Co., Ltd. has been adhering to the 'quality first, customer first' business philosophy, to ensure that the products of high-precision, wide range of wall thicknesses, small quantities of many varieties, fast-paced characteristics of the production, sales in the domestic advanced level, especially in the small-diameter medium-thick-walled and large-calibre thin-walled alloy seamless steel pipe production at the domestic advanced level. Level. Products at home and abroad enjoy a reputation for a variety of project construction, play their own characteristics of manufacturing energy.

Our Advantages

1. Exceptional Service: We guarantee a response to all inquiries within 12 hours.

2. Certifications: Proudly holding ISO 9001, CE, and SGS certifications.

3. Cost - Effective Quality: Benefit from competitive prices and top - notch quality, as our products are directly sourced from our own factory.

4. Robust Production Capacity: With a monthly output of 20,000 tons, we ensure seamless production.

5. Flexible Payment Terms: We accept various payment methods, including T/T and L/C.

6. Swift Delivery & Standard Export Packaging: Expect quick delivery and products packaged in line with international export standards.

7. Factory - Direct Advantage: Our own factory enables us to offer competitive prices without compromising on quality.

8. Third - Party Testing: We welcome any third - party testing to verify the quality of our products.

9. Expert Team Support: Backed by a professional sales team and a reliable factory.

10.Dedicated to Customization: Your individual specifications are not just accepted-they're the cornerstone of our service. We're committed to delivering on every customized request.

FAQ

Q1: What are your primary product offerings?

A1: We are a leading manufacturer and supplier of high-quality steel products, specializing in:
Stainless Steel & Carbon Steel: Sheets/plates, coils, and pipes/tubes (both seamless and welded)
Structural Components: Various bar profiles (round, square, hexagonal, flat, angle), C-channels, and H/I-beams
Custom Fabrications: Tailored solutions to meet specific project requirements

Q2: What quality assurance measures do you have in place?

A2: We maintain stringent quality control through:
Comprehensive Mill Test Certificates provided with all shipments
Optional third-party inspection services (SGS, BV, etc.)
ISO-certified manufacturing processes
Rigorous in-house testing and quality checks

Q3: What are your standard packaging terms?

A3: Our standard packaging includes:
Bundled or coiled goods secured with steel rods/straps
Custom packaging solutions available per customer specifications
Export-grade packaging to ensure optimal protection during transit

Q4: What is your typical delivery timeline?

A4: We offer flexible delivery options:
Stock items: Ready for shipment within 3 business days after deposit confirmation
Made-to-order items: Production typically completed within 7-15 working days post-deposit
Expedited options available for urgent requirements

Q5: What competitive advantages does your company offer?

A5: We differentiate ourselves through:
A team of highly skilled professionals and technical experts
Industry-leading pricing without compromising quality
Unparalleled after-sales support and customer service
Extensive inventory and reliable supply chain management

Q6: Do you provide product samples?

A6: Yes, we're pleased to offer:
Complimentary small samples from existing inventory
Customer only responsible for shipping costs
Custom samples available for specific project needs

Q7: What are your payment terms?

A7: Our standard payment structure:
30% advance payment via T/T to initiate production/order
Remaining 70% balance due prior to shipment
Full documentation including product photos and packaging details provided before final payment
 

Why Choose Us?

√ Quality Assurance: Rigorous testing and certification
√Competitive Pricing: Cost-effective solutions without compromise
√ Reliable Delivery: On-time fulfillment guaranteed
√ Custom Solutions: Tailored to your exact specifications
√ Expert Support: Technical guidance at every stage
For further inquiries or specific requirements, please contact our sales team. We're committed to providing exceptional service and top-quality steel products for your projects.