GB/T8162-2008 Seamless Carbon Steel Marine Round Black Tubes Q235/275/335

• Customization: Available
• After-sales Service: Oversea After-Sales Service
• Warranty: Confirm with The Sellers
• Model NO.: GB/T8162-2008
• Type: Welded
• Technique: Cold Rolled
• Material: Carbon Steel
• Surface Treatment: Polished
• 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
• Products: Supplier Manufacturing Price Per Kg DIN 2448 ASTM
• Standard Specifications: GB/T5312-1999
• Steel Grades: Q235/275/355
• Main Process: Cold-Formed Seamless
• Unit Leagth: 5800mm-12000mm
• Wt: 1.25mm - 50mm Sch10,Sch40,Sch60,Xs,Sch80,Std,Xxs
• Od: out Diameter 1/4 Inch - 36 Inch 6.35mm - 914.4m
• Ends: Plain Ends
• Delivery: 7-35 Days
• Surface: Pickled, Bright Annealed, Polished
• Package: Packed by Bundles, Plastic Bags, Wooden Case,etc
• Usage 1: Pipeline Transport, Boiler Pipe, Hydraulic/Automob
• Usage 2: General Structure and Mechanical,Structure Purpose
• Usage 3: Electronics, Industrial, Food, Boiler
• Usage 4: Oil Transportation, Power Station, Condenser
• Transport Package: Seaworthy Package
• Specification: 0.8mm-25mm
• Trademark: EZ Steel
• Origin: China
• HS Code: 73043110
• Production Capacity: 500000/Year

Product Description

GB/T8162-2008 Seamless Carbon Steel Marine Round Black Tubes Q235/275/335

Product Description

 

 

ASTM / ASME

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Black and Hot-Dipped Zinc-Coated Seamless Steel Pipes	ASTM A53	Ø10.3~1200 x WT1.0~150	Gr.A, Gr.B, Gr.C
Seamless Carbon Steel Pipes for High Temperature Service	ASTM A106	Ø10.3~1200 x WT1.0~150	Gr.B, Gr.C
Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes	ASTM A179	Ø10.3~426 x WT1.0~36	Low Carbon Steel
Seamless Carbon Steel Boiler Tubes for High Pressure	ASTM A192	Ø10.3~426 x WT1.0~36	Low Carbon Steel
Seamless Cold-Drawn Intermediate Alloy Steel Heat-Exchanger and Condenser Tubes	ASTM A199	Ø10.3~426 x 1.0~36	T5, T22
Seamless Medium-Carbon Steel Boiler and Superheater Tubes	ASTM A210	Ø10.3~426 x WT1.0~36	A1, C
Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater and Heat-Exchanger Tubes	ASTM A213	Ø10.3~426 x WT1.0~36	T5, T9, T11, T12, T22, T91
Seamless Carbon and Alloy Steel for Mechanical Tubing	ASTM A333	Ø1/4"~42" x WT SCH20~XXS	Gr.1, Gr.3, Gr.6
Seamless and Welded Carbon Steel Pipes and Alloy Steel Pipes for Low Temperature Use	ASTM A334	Ø1/4"~4" x WT SCH20~SCH80	Gr.1, Gr.6
Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes	ASTM A556	Ø10.3~426 x WT1.0~36	A2, B2

 

GB/T 8162-2008 seamless carbon steel marine round black tubes are high-quality structural pipes designed for marine applications, shipbuilding, and offshore engineering. Manufactured from Q235, Q275, and Q335 carbon steel grades, these tubes offer excellent strength, durability, and weldability in harsh marine environments.

These black steel pipes feature seamless construction for superior pressure resistance and structural integrity, making them ideal for ship hulls, offshore platforms, and marine piping systems.

 

Key Features & Benefits

 High-Strength Material - Made from Q235/Q275/Q335 carbon steel for excellent structural performance
 Seamless Construction - No weak welds, ensuring higher pressure resistance
 Corrosion Resistant - Suitable for marine and offshore applications
 Precision Manufacturing - Strict compliance with GB/T 8162-2008 standard
 Easy to Weld & Machine - Simplifies installation in shipbuilding projects
 Multiple Applications - Used in ship structures, offshore platforms, and marine engineering

 

Technical Specifications

Parameter	Details
Standard	GB/T 8162-2008
Material Grade	Q235, Q275, Q335
Type	Seamless
Outer Diameter (OD)	10mm - 426mm
Wall Thickness	1mm - 40mm
Length	4m - 12m (custom lengths available)
Surface Treatment	Black (bare), varnished (optional)
Tensile Strength	375-510 MPa (varies by grade)
Impact Test	Available upon request

 

Applications

 Shipbuilding - Hull structures, piping systems, mast components
 Offshore Engineering - Oil platforms, marine risers, support structures
 Marine Construction - Dock facilities, harbor equipment
 Industrial Machinery - Hydraulic cylinders, bearing sleeves
 Structural Applications - Bridges, construction frameworks

 

Detailed Photos

 

Packaging & Shipping

Our Advantages

 

Certifications

FAQ

Q:  How many days can you deliver after confirmed the order?
A:  For stock:  within 5-7 days;
      For customized product:  around 30 days;
      For special sizes:  subject to negotiation.

Q: How does your company do quality control?
A: ISO 9001:2015 certified;
     Product certificate as per EN10204 3.1 or 3.2 as per customer's request.
    
  
Q: Can I have a factory-visit?
A:  Surely. All customers are welcome to visit us in China.

Q: Can I have a trial order?
A: Of course, it is an honor for us to have the opportunity to show our quality and service. 
 

Company Profile

	Business Type:	Manufacturer/Factory
	Main Products:	Carbon Steel Pipe , Stainless Steel Pipe , Copper Nickel Tube , Heat Exchanger Tube , Boiler ...
	Registered Capital:	2000000 RMB
	Plant Area:	>2000 square meters
	Management System Certification:	ISO 9001, ISO 14001, OHSAS/ OHSMS 18001, ANSI/ESD
	Average Lead Time:	Peak Season Lead Time: 1-3 months Off Season Lead Time: within 15 workdays

SGS Serial NO. :

QIP-ASI199413Report Verification

EZ STEEL INDUSTRIAL Co., Ltd, together with LONG-RUN METALS Co., Ltd, is the export division and window company of EZ STEEL GROUP, which was founded in 1996 and has been committed to the development and manufacturing of industrial tubes in the past 20 years. It is one of the largest steel tube manufacturing enterprise groups in China. The group possess fixed assets over 200million and more than 800 employees with annual production capacity over 300 thousand tons.

The company has continuously introduced the world advanced manufacturing equipment and now is able to produce welded and seamless steel tube, copper tube and nickle alloy tube. We also have our own coating facilities and workshops for further processing. After years of development, EZ STEEL GROUP and the affiliated enterprises have obtained many kinds of domestic and international certifications including ISO 9001 Quality Management System Certification, ISO14000 Environment Management System Certification, CE, License for Manufacture of Pressure Piping in China, etc. The company has obtained good domestic achievements and is the nominated supplier of CNPC and CNOOC. The product are exported to Southeast Asia, the Middle East and Africa, Europe, Australia, North and Latin Americas via trade companies, and are widely used in pipeline works, foundation works, steel structure works, boiler and condenser fabrication, oil refinery plant, power plant, sugar-making plant, ship-building and offshore construction projects etc.

Holding the concept of First-class Brand, First-class Service, First-class Value, EZ STEEL GROUP is aiming to build up a win-win enterprise platform for both our customers and employees.

CONTACT US
Contact: Rosy Xu
EZ STEEL INDUSTRIAL CO., LTD
Add: No.199,  Xiangfu Road, Yuhua Industrial Zone, Changsha City , P.R China 

Pls. do not hesitate to contact me if you have any questions!

You are warm welcomed to visit our factory!!!

Thank you for visiting our products & Looking forward to hearing from you!