Carbon Steel Welded Pipes / Tubes

PRODUCT PARAMETERS

Sunyon Tech offers a wide variety of carbon steel welded pipes / tubes specifications and sizes ranges for your specific application based on the fabrication method in which the steel will be used. The properties of carbon steel are high hardness and strength.

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Description

FAQs

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Description

Carbon steel welded pipes / tubes in various sizes can meet structural and mechanical piping requirements for water, petroleum, oil and gas, construction, and other industrial applications. Carbon steel has good properties in hardness and strength, and it is less expensive than other steel.

Product Specification and Size :

Available Specification

API SPEC 5CT

Casting	API 5CT	Ø48.3~273 x WT2.77~11.43	J55, K55, N80, L80
Tubing	API 5CT	Ø48.3~273 x WT2.77~11.43	J55, K55, N80, L80, H40

API SPEC 5L

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Line Pipes	API 5L	Ø60.3~273.1 x WT2.77~12.7	A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80

ASTM / ASME

oduct Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Electric-Resistance-Welded Steel Pipes	ASTM A135	Ø42.2~114.3 x WT2.11~2.63	A
ERW and Hot-dip Galvanized Steel Pipes	ASTM A53	Ø21.3~273 x WT2.11~12.7	A, B
Pipes for Piling Usage	ASTM A252	Ø219.1~508 x WT3.6~12.7	Gr.2, Gr.3
Tubes for General Structural Purpose	ASTM A500	Ø21.3~273 x WT2.11~12.7	Gr.2, Gr.3
Square Pipes for General Structural Purpose	ASTM A500	25 x 25~160 x 160 x WT1.2~8.0	Carbon Steel

DIN

roduct Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Threaded Steel Pipes	DIN 2440	Ø21~164 x WT2.65~4.85	Carbon Steel

BS

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Screwed and Socketed Steel Tubes	BS 1387	Ø21.4~113.9 x WT2~3.6	Carbon Steel

EN

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Scaffolding Pipes	EN 39	Ø48.3 x WT3.2~4	Carbon Steel

JIS

Carbon Steel Tubes for General Structure Purpose	JIS G3444	Ø21.7~216.3 x WT2.0~6.0	Carbon Steel
Carbon Steel Tubes for Machine Structure Purpose	JIS G3445	Ø15~76 x WT0.7~3.0	STKM11A, STKM13A
Carbon Steel Pipes for Ordinary Piping	JIS G3452	Ø21.9~216.3 x WT2.8~5.8	Carbon Steel
Carbon Steel Pipes for Pressure Service	JIS G3454	Ø21.7~216.3 x WT2.8~7.1	Carbon Steel
Carbon Steel Rigid Steel Conduits	JIS G8305	Ø21~113.4 x WT1.2~3.5	G16~G104, C19~C75, E19~E75
Carbon Steel Rectangular Pipes for General Structure	JIS G3466	16 x 16~150 x 150 x WT0.7~6	Carbon Steel

Application

Carbon steel welded pipe and tube are used in high-pressure conditions. They are highly resistant to shock and vibration, making them ideal to transport fluids. Carbon steel pipes are widely used in a number of industries, such as transporting water and sewage, oil and gas industries, boiler and condenser tubes, high-pressure applications, and chemical processing.

– Transporting water and sewage
– Oil and gas industries
– Boiler and condenser tubes
– High-pressure applications
– Chemical processing

FAQs

What types of products can we offer?

We provide a comprehensive range of products and services across multiple industries to meet diverse supply chain needs. Our offerings include:

Core Product Categories

Machinery & Equipment
- Small food processing equipment, compact ovens, and pre-owned industrial machinery.
Steel Products
- Seamless steel pipes, welded pipes, galvanized pipes/coils, color-coated coils, and scaffolding systems.
Building Materials
- Wood flooring, ceramic tiles, and aluminum alloy doors/windows.
Agricultural Machinery
- Tractors (50-200 HP), threshers, grain dryers, water pumps, and drip irrigation systems.
New Energy Solutions
- Solar power products, small-scale generators, and wind energy equipment.
Automotive & Parts
- Pre-owned vehicles (cars, trucks, construction machinery) and automotive components.
Hardware
- Industrial and household hardware accessories.
Home & Apparel
- Custom-sized bedding and curtains, budget-friendly clothing/shoes (clearance stock), and customizable luggage/backpacks.

Value-Added Services

We enhance your experience with:

End-to-End Support: From procurement to logistics and partnership coordination.

Product Sourcing: Access to global suppliers for specialized requests.

Customization: Tailored products (e.g.,size-specific home textiles).

Quality Assurance: Rigorous inspections for compliance and durability.

What logistics do we ship through?

We partner with trusted global and local logistics providers to ensure efficient, reliable, and cost-effective shipping solutions tailored to your needs. Our logistics network includes:

Shipping Options

Sea Freight: Ideal for bulk orders (e.g., steel products, machinery) with competitive rates and containerized shipping.
Air Freight: Fast delivery for urgent or high-value items (e.g., automotive parts, customized goods).
Land Transport: Road and rail services for regional deliveries (e.g., building materials, agricultural machinery within continental regions).
Courier Services: Express shipping via DHL, FedEx, or UPS for smaller parcels (e.g., hardware, apparel samples).

Key Features

Global Coverage: We ship to Asia, Europe, North America, Africa, and beyond.
Custom Clearance: Assistance with documentation and regulatory compliance for seamless cross-border trade.
Real-Time Tracking: Monitor shipments through our platform or partner portals.
Insurance Options: Optional cargo insurance for high-value or fragile goods.

For more information please check: Logistics Information – Welseek Co., Ltd

Can it be customized as per our requirements?

Absolutely! At SunyonTech, we prioritize flexibility and tailor-made solutions to align with your specific needs. Our customization services span multiple product categories and include both design and functional adaptations.

Customization Capabilities

Bespoke hardware components or retrofitting options for pre-owned vehicles.

Home & Apparel:

Bedding, curtains, and luggage tailored to your exact size specifications.

Private labeling for clothing, shoes, and bags (OEM/ODM services available).

Machinery & Equipment:

Modifications to food processing units, ovens, or pre-owned machinery to suit operational requirements.

Branding or technical upgrades for industrial equipment.

Building Materials:

Custom-cut steel products (e.g., pipes, scaffolding) or materials like tiles/flooring in unique dimensions.

Agricultural & New Energy:

Adjustments to tractors, irrigation systems, or solar/wind equipment for regional or technical compatibility.

Hardware & Automotive: Bespoke hardware components or retrofitting options for pre-owned vehicles.

Process Overview

Requirement Consultation: Share your specifications (design, size, material, branding, etc.).
Feasibility Review: Our engineers and sourcing team assess technical and logistical viability.
Prototyping & Approval: Samples provided for quality and design validation.
Production & Quality Inspection: Rigorous checks ensure compliance with your standards.
Delivery: Seamless logistics for your customized order.

Why Choose Us?

End-to-End Support: From concept to delivery, we handle every detail.
Competitive Pricing: Scalable solutions for bulk orders or niche projects.
Quality Assurance: Guaranteed compliance with agreed specifications.

What is our ordering process?

At SunyonTech, we streamline the ordering process to ensure efficiency, transparency, and satisfaction at every stage. Here’s a step-by-step guide:

Core Process Steps

Regular updates provided upon request.

Inquiry & Consultation

Submit your product/service requirements via our online form, email, or direct consultation.

Specify details like quantity, customization needs (e.g.,size adjustments, branding), or sourcing requests.

Quotation & Negotiation

Receive a detailed proposal with pricing, lead times, and terms within 1-3 business days.

Discuss adjustments (e.g., bulk discounts, logistics preferences) with our team.

Order Confirmation

Finalize specifications and sign a purchase agreement.

For custom projects, approve prototypes or samples before full production.

Production & Sourcing

Our team oversees manufacturing, customization, or sourcing (including second-hand equipment refurbishment if applicable).

Quality Inspection
- Mandatory pre-shipment checks for compliance with agreed standards (learn more in our Quality Assurance FAQ).
Payment & Logistics
- Secure payment via bank transfer, L/C, or other agreed methods.
- Choose from flexible shipping options (sea, air, land) managed by our logistics partners.
Delivery & After-Sales
- Track your order in real-time and receive post-delivery support for returns, warranties, or future collaborations.

Key Features

Flexible MOQs: Accommodate both small trial orders and large-scale purchases.
Custom Workflows: Integrate OEM/ODM services, private labeling, or unique technical specifications.
Documentation Support: Handle invoices, certifications, and customs paperwork.
Dedicated Account Manager: Single point of contact for seamless communication.

Special Cases

Pre-Owned Equipment: Includes additional steps like condition verification and refurbishment timelines.
Urgent Orders: Expedited production and air freight available (premium costs apply).

What services are included in the after-sales service?

At SunyonTech, we prioritize long-term partnerships by offering robust after-sales support to ensure your satisfaction and operational success. Our after-sales services include:

Key After-Sales Services

Cost-effective repair services for damaged goods, including二手/second-hand equipment refurbishment.

Technical Support

24/7 troubleshooting and guidance for machinery, equipment, or technical products (e.g., tractors, food processing units, solar systems).

On-site or remote assistance for installation, calibration, or repairs (subject to regional availability).

Warranty Coverage

Complimentary warranty periods for new products (duration varies by category; e.g., 12 months for machinery, 6 months for apparel).

Transparent terms for refurbished/pre-owned equipment (clearly stated in purchase agreements).

Returns & Replacements

Hassle-free return policies for defective or non-compliant items (within 30 days of delivery, subject to inspection).

Expedited replacements for urgent cases (e.g., critical automotive parts or agricultural tools).

Spare Parts & Repairs

Access to genuine spare parts for machinery, vehicles, and hardware (global sourcing network).

Customization Adjustments
- Post-delivery modifications for tailored products (e.g., resizing curtains/bedding, retrofitting machinery).
Maintenance Contracts
- Optional scheduled maintenance plans for high-value equipment (e.g., tractors, industrial ovens, solar systems).
Training & Documentation
- User manuals, instructional videos, or operator training sessions for complex machinery.

Additional Support

Feedback Integration: Share your experience to help us improve product quality and service efficiency.
Loyalty Programs: Exclusive benefits for repeat clients, including discounted logistics or priority customization.
Business Collaboration: Ongoing partnership opportunities for bulk orders, joint ventures, or new product development.