ASTM A53 Gr. B Q235B Sch40 6m Welded Carbon Steel Round Pipe
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Product Highlights
- Wide Size Range: Outer diameter from 21.3mm to 610mm and wall thickness up to 20mm available.
- Custom Dimensions: Support for custom outer diameter, wall thickness, and length services.
- Fast Delivery: 7 days for standard sizes, 15 days for custom orders.
- Free Samples: Free small samples available for quality verification.
- ISO9001 Certified: Product meets ISO9001 quality management system standards.
- Versatile Applications: Suitable for pipeline transport, construction, oil/gas drilling, and machinery.
- Multiple Surface Treatments: Options include black rust proof painting, galvanizing, and oil coating.
- Flexible Shipping: Shipping via sea, land, express, or air with container or bulk options.
Product Attributes
- Customization
- Available
- Type
- Welded
- Technique
- ERW
- Model NO.
- ASTM A53 Gr. B / GB/T 8162 Q235B
- Material
- Carbon Steel
- Surface Treatment
- Black Rust Proof Painting
- Usage
- Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Construction & Decoration, Special Purpose
- Section Shape
- Round
- Execution Standard
- ASTM A53, GB/T 8162
- Outer Diameter Range
- 21.3mm - 610mm
- Wall Thickness Range
- 2.0mm - 20mm (Sch40)
- Regular Length
- 6m Customization Supported
- Custom Size Service
- Support Custom Od/Wt/Length
- Application Field
- Construction, Scaffolding, Fluid Transport
- Customizable Service
- Support Customization for Special Outer Diameter,
- Sample Service
- Free Small Sample Available
- Delivery Time
- 7 Days for Standard, 15 Days for Custom
- Product Certification
- ISO9001 Certified
- Processing Service
- Cutting, Threading, Galvanizing, Beveling, Paintin
- End Treatment
- Plain/Beveled/Threaded Optional
- End Protection
- Plastic Cap for Ends Protection
- Inner Rust Protection
- Inner Rust Proof Oil Coating
- Shipping Method
- Sea/Land/Express/Air Optional
- Transport Package
- Bundle + Waterproof Film + Solid Pallet
- Trademark
- KANGHONG
- Origin
- Shandong, China
- Production Capacity
- 50000
Product Images of ASTM A53 Gr. B Q235B Sch40 6m Welded Carbon Steel Round Pipe
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Product Description

Product Name | Q235 S235 sS400 Black welded rectangular square steel pipe RHS SHS steel tube |
Material | carbon steel |
Standard | GB/T6725 GB/T6728 EN10210EN10219,ASTM A500ASTM A36.AS/NZS1163.JIS.EN.DIN17175 |
Grade | Q195,Q235(A,B,C,D),Q345(A,B,C,D),ASTM A500.S235JR.S235JOH.S355JR.S355JOH.C250LO.C350LOSS400 |
Delivery&Shipme | 1)By Container(1-5.95 meter suitable to load 20ft container6-12 meter length nt suitable to load 40 ft container) 2) Bulk shipment |


REGULAR SIZE | ||
SIZE (OUTER DIAMETER) | WALL THICKNESS | LENGTH |
20x20 / 25x25 | 1.2MM --2.75MM | 6M IN STOCK (OR CUSTOMIZED) |
30x30 / 20x40 / 30x40 / 25x40 | 1.2MM -- 3.5MM | 6M IN STOCK (OR CUSTOMIZED) |
40x40 / 50x5030x50 / 25x50 / 30x60 / 40x60 | 1.2MM -- 4.75 MM | 6M IN STOCK (OR CUSTOMIZED) |
60x60 / 50x70 / 40x80 / 40x50 | 1.2 MM -- 5.75 MM | 6M IN STOCK (OR CUSTOMIZED) |
70x70 / 60x80 / 50x80 / 100x40 / 50x90 | 1.5MM -- 5.75 MM | 6M IN STOCK (OR CUSTOMIZED) |
75x75 / 80x80 / 90x90 60x100 / 50x100 / 120x60 / 100x80 / 60x90 | 1.5MM -- 7.75 MM | 6M IN STOCK (OR CUSTOMIZED) |
100x100 / 120x80 | 1.8MM -- 7.75 MM | 6M IN STOCK (OR CUSTOMIZED) |
120x120 / 130x130 180x80 / 160x80 / 100x150 / 140x80 / 140x60 | 2.5MM -- 10.0 MM | 6M IN STOCK (OR CUSTOMIZED) |
140x140 / 150x150 / 100x180 / 200x100 | 2.5MM -- 10.0 MM | 6M IN STOCK (OR CUSTOMIZED) |
160x160 / 180x180 / 200x150 | 3.5MM -- 11.0 MM | 6M IN STOCK (OR CUSTOMIZED) |
200x200 / 250x150 / 100x250 | 3.5MM -- 11.0 MM | 6M IN STOCK (OR CUSTOMIZED) |
250x250 / 250x200 / 300x150 / 300x200 | 4.5MM -- 15.0 MM | 6M IN STOCK (OR CUSTOMIZED) |
300x300 / 350x200 / 350x250 /300x150 | 4.5MM -- 15.0 MM | 6M IN STOCK (OR CUSTOMIZED) |
350x350 350x300 / 450x250 / 400x300 / 500x200 | 4.5MM -- 15.75 MM | 6M IN STOCK (OR CUSTOMIZED) |
400x400 / 280x280 450x300 / 450x200 / 400x350 / 400x250 / 500x250 / 500x300 | 4.5MM -- 15.75 MM | 6M IN STOCK (OR CUSTOMIZED) |









About the Supplier
This supplier has been audited by SGS. Verify the report on the official SGS website with ID "QIP-ASI2552079". Items marked "" are certified.
Company Profile
Shandong Kanghong Machinery Manufacturing Co., Ltd.
Shandong Kanghong Machinery Manufacturing Co., Ltd., established in 2019, has its office located in Huaiyin District, Jinan City, Shandong Province. With a convenient location, our office provides efficient coordination and service support for business operations, while our production factories are situated in other cities with complete supporting facilities to ensure stable production and supply.
We are specialized in the R&D, production and sales of stainless steel, carbon steel and galvanized steel products, with our main product range covering steel coils, steel sheets, steel pipes, mechanical parts and other high-quality steel-related products. Backed by years of profound industry experience and professional technical accumulation, we have long been recognized as a trusted and stable cooperative partner for customers around the world. All our products strictly comply with top domestic and international quality standards, including GB, ASTM, DIN and JIS, ensuring superior performance and reliable quality.
To guarantee product quality from the source, we have established in-depth cooperation with advanced manufacturing bases equipped with state-of-the-art production facilities and a team of professional technical workers. We strictly implement a complete quality management system in line with international standards, covering every link from raw material procurement, production processing to finished product inspection. Our professional quality inspection team conducts strict testing on each batch of products, focusing on product precision, corrosion resistance and durability, to ensure that every product delivered to customers meets the highest quality requirements.
With a global vision, our products have been exported to more than 50 countries and regions across Europe, Southeast Asia, the Middle East, North America and Africa, winning a high reputation in the global market for their stable quality, reasonable prices and timely after-sales service. We have a professional and experienced international sales team, composed of members with rich cross-border trade experience and proficient in multiple languages. The team is committed to providing efficient, customized one-stop trade services, including product consultation, order customization, logistics arrangement and after-sales support, fully responding to the diverse needs of customers.
Guided by the business philosophy of "customer-centric, quality-oriented, integrity-based and win-win development", we are committed to prioritizing customer needs, solving practical challenges for customers, and delivering reliable product quality and comprehensive after-sales service. Over the years, our sincere service and high-quality products have earned wide recognition and praise from global customers. Looking forward to the future, Shandong Kanghong Machinery Manufacturing Co., Ltd. Will continue to uphold the spirit of innovation and forging ahead, continuously improve product quality and service level, and warmly welcome partners from all over the world to establish long-term, stable and win-win cooperative relations, and create a better future together!
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- Liaocheng, Shandong, China
-
Plant Area
- 2000 square meters
-
Number of Employees
- 10
-
Registered Capital
- 10,080,000 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: within 15 workdays -
Nearest Port
- Tianjin
-
Minimum Order Quantity
- 27 tons
-
Supply Chain Partners
- 10
Our Production Capability & Technical Expertise
-
Main Products
- Carbon Steel Coil, Carbon Steel Plate, PPGI Steel Coil, Steel Sheet, Stainless Steel Coil
-
Production Lines
- 2
-
Production Machines
- Punching machine, Shearing machine
-
QA/QC inspectors
- 1 people
-
Inspection Type for Finished Products
- Random inspection(Function inspection & Visual inspection)
-
Inspection Method for Finished Products
- Finished product checked by packing staff
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
R&D Engineers
- 1 people
-
Traceability of Raw Materials
- Yes
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2019-11-27
-
Export Year
- Foreign trade business has just begun
-
Main Markets
- Domestic
-
Repeat Buyers Choice
- 30%~50%
-
Number of Foreign Trading Staff
- 1
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- Yes
Our Certifications, Standards & Industry Recognition
-
Cooperated with Fortune 500
- No
FAQ
- What is the delivery time for standard and custom orders?
- 7 days for standard sizes and 15 days for custom orders.
- Can you provide free samples?
- Yes, free small samples are available.
- What is the minimum order quantity?
- The minimum order quantity is 27 tons.
- What payment terms do you accept?
- We accept LC, T/T, D/P, PayPal, Western Union, and small-amount payments.
- Do you offer customization services?
- Yes, we support customization for outer diameter, wall thickness, and length.
- What certifications does the product have?
- The product is ISO9001 certified.
- What are the available shipping methods?
- We offer sea, land, express, and air shipping options.
- What is the maximum wall thickness available?
- The wall thickness range is 2.0mm to 20mm.
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