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A36 Q345 Galvanized Seamless Square Tubing Carbon Steel Boiler Tubes Cold Drawn

Basic Information
Place of Origin: China
Certification: ISO9001
Packaging Details: In Bundles, Woodenbox As Your Requirement
Detail Information
Name: A36 Q345 Hot Rolling Cold Drawn Carbon Galvanized Steel Square Rectangular Round Stainless Boiler Precision Honed Tube Seamless Keyword: Seamless Boiler Tube
Standard: JIS EN GB AiSi ASTM DIN Bs,etc Grade: 10#,Q235,Q345C,A53A19Mn5,GR.1,GR.B,etc
Thickness: 0.5-45mm,According To Customer Requirements Straightness: <=0.5/1000
Length: 12M, 6m, 6.4M Schedule: SCH10,,SCH40,SCH60,SCH80, SCH120,SCH160 XXS
Shape: Round.square.Rectangle Technique:: ERW, Hot Rolled
Surface Treatment: Mil Finished,Powder Coating,Anodized Wall Thickness: 0.5-45mm,According To Customer Requirements
Certificate: API, CE, SASO, ISO9001 O.D: 14 - 1220 Mm, 19 - 1219 Mm
Ends: Plain Beveled Square Cut Material: 10#,Q235,Q345C,A53A19Mn5,GR.1,GR.B,etc
High Light:

Q345 seamless square tubing


Galvanized seamless square tubing


Galvanized carbon steel boiler tubes

Product Description

A36 Q345 Hot Rolling Cold Drawn Carbon Galvanized Steel Square Rectangular Round Stainless Boiler Precision Honed Tube 



The Steel Pipe Should Be Tested Hydraulically One By One. The Maximum Test Pressure Is 20 MPa. Under The Test Pressure, The Stabilization Time Should Be Not Less Than 10 S, And The Steel Pipe Should Not Leak.

After The User Agrees, The Hydraulic Test Can Be Replaced By Eddy Current Testing Or Magnetic Flux Leakage Testing.

Nondestructive Test:

Pipes That Require More Inspection Should Be Ultrasonically Inspected One By One. After The Negotiation Requires The Consent Of The Party And Is Specified In The Contract, Other Non-Destructive Testing Can Be Added.

Flattening Test:

Tubes With An Outer Diameter Greater Than 22 Mm Shall Be Subjected To A Flattening Test. No Visible Delamination, White Spots, Or Impurities Should Occur During The Entire Experiment.

Hardness Test:

For Pipe Of Grades P91, P92, P122, And P911, Brinell, Vickers, Or Rockwell Hardness Tests Shall Be Made On A Specimen From Each Lot

Bend Test:

For Pipe Whose Diameter Exceeds NPS 25 And Whose Diameter To Wall Thickness Ratio Is 7.0 Or Less Shall Be Subjected To The Bend Test Instead Of The Flattening Test. Other Pipe Whose Diameter Equals Or Exceeds NPS 10 May Be Given The Bend Test In Place Of The Flattening Test Subject To The Approval Of The Purchaser 




Product Name
Carbon steel pipe
Q195 = S195 / A53 Grade A
Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2
Q345 = S355JR / A500 Grade B Grade C
13CrMo44,30CrMo,A333 GR.1,GR.3,GR.6,GR.7,etc
Clean, blasting and painting or as required
Hot rolled/Cold rolled/Galvanized
Shock absorber,Motorcycle accessories,drill pipe,Excavator accessories,Auto part,hight pressure boiler tube, honed tube,Transmission shaftetc
10tons.We also can accept sample order
200,000 tons/year
Shipment time
Within 10-20 workdays after receiving deposit



A36 Q345 Galvanized Seamless Square Tubing Carbon Steel Boiler Tubes Cold Drawn 0


Q: What product information must I provide before making a purchase?
Please provide the grade, width, thickness, and surface treatment requirements, as well as the quantities you require.

Q: What shipping ports are there?
We normally ship from Shanghai,Tianjin, Qingdao, and Ningbo ports

Q: Is it possible to send samples?
Of course, we offer free samples and express shipping to customers all over the world.

Q: Do you offer a service for customized products?
Yes, we can produce according to your specifications and drawings.

Q: Can I pay you a visit at your factory?
Customers from all around the world are welcome to visit our factory.

Q: Can you assist me in importing steel products for the first time?
Yes, we have shipping agent who will arrange the shipment with you.

Q: Do you have any MOQ limit for production?
We don’t have any MOQ limit. But as for our steel pipe product, we usually use container transport for lower freight. In the case of express delivery, high freight charges will be generated.

Q: Is it OK to print my logo on the product or the carton packing?
Yes. Please inform us formally before our production and confirm the design firstly based on our sample.

Q: How to pack the product?
The inner layer has a waterproof paper outer layer, iron packaging, and is fixed with a fumigated wooden pallet. It
can effectively protect products from corrosion during ocean transportatio

Contact Details

Whatsapp : +8613961408918