• Construction Material Q235 Black Welded Tubular Steel System 1
  • Construction Material Q235 Black Welded Tubular Steel System 2
Construction Material Q235 Black Welded Tubular Steel

Construction Material Q235 Black Welded Tubular Steel

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1Construction Material Q235 Black Welded Tubular Steel:

ERW steel pipe is electric resistance welding, the abbreviation for ERW for transporting oil and natural gas vapor liquid objects, can meet the requirements of high and low pressure, the transport in the world with pipe sector accounted for a pivotal position.

 

2‍‍Main Features of Construction Material Q235 Black Welded Tubular Steel:

• High manufacturing accuracy

• High strength

• Good visual effect

• Reasonable price  

• Small inertia resistance

• Strong heat dissipation ability

 

3Construction Material Q235 Black Welded Tubular Steel Specification

Standard

GB, DIN, ASTM

ASTM A106-2006, ASTM A53-2007

Grade

10#-45#, 16Mn

10#, 20#, 45#, 16Mn

Thickness

1 - 33 mm

Section Shape

Round

Outer Diameter

21 - 610mm

Place of Origin

Tianjin, China (Mainland)

Secondary Or Not

Non-secondary

Application

Hydraulic Pipe

Technique

Cold Drawn

Certification

API

Surface Treatment

factory state or painted black

Special Pipe

API Pipe

Alloy Or Not

Non-alloy

Length

5-12M

Outer Diameter

21.3-610mm

Grade 

20#, 45#, Q345, API J55, API K55, API L80, API N80, API P110, A53B

Standard

ASME, ASTM

 

1) Material:20#(ASTM A 106/A53 GRB.API5LGRB,GB),45#,16Mn,10#.

2) Specification range:OD:21.3-610mm,WT:6-70mm,length:6-12m or according to the requirement of clients.

3) Excutive standards:GB,ASME API5L.ASTM A 106/A53,Despite of the above standards,we can also supply seamless steel pipe with standard of DIN,JIS,and so on,and also develop new products according to the requirements of our clients!
4) Surface:black lacquered,varnish coating or galvanized.
5) Ends:Beveled or square cut,plastic capped,painted.
6) Packing:bundles wrapped with strong steel strip,seaworthy packing. 

 

 

4Packaging & Delivery

Packaging Details:

seaworthy package,bundles wrapped with strong steel strip

Delivery Detail:

15-30days after received 30%TT

 

5FAQ of Construction Material Q235 Black Welded Tubular Steel: 

How is the quality of your products?
    Our products are manufactured strictly according to national and internaional standard, and we take a test 
on every pipe before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.
Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.

How about price?
    Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,if you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.

Why should you chose us?
    Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.

 

6‍‍ Welded Black ERW Steel Pipe Images ‍‍

Q:What are the different types of steel pipe bends?
There are several types of steel pipe bends, including long radius bends, short radius bends, and induction bends. Long radius bends have a larger radius and are used when a gentle bend is required. Short radius bends have a smaller radius and are used when a more abrupt bend is needed. Induction bends are created using a heating process to achieve specific bend angles and radii.
Q:What are the thermal properties of steel pipes?
Steel pipes have excellent thermal conductivity, meaning they can efficiently transfer heat. They also have a high melting point and can withstand high temperatures without deformation. Additionally, steel pipes have low thermal expansion, allowing them to maintain their shape and structural integrity even when exposed to extreme temperature changes.
Q:What are the different types of steel pipe end connections?
There are several types of steel pipe end connections, including threaded, socket weld, butt weld, flanged, and grooved connections.
Q:What are the different methods of transporting steel pipes?
There are several methods of transporting steel pipes, including by truck, rail, ship, and pipeline. Each method has its advantages and is chosen based on factors such as distance, cost, and accessibility. Trucks are commonly used for shorter distances or when the delivery location is not easily accessible by other means. Rail transport is efficient for long distances and can handle large quantities of steel pipes. Shipping by sea is ideal for international shipments or when the destination is located near a port. Lastly, pipelines are used for transporting steel pipes for oil and gas industries, as they provide a direct and continuous flow.
Q:What's the difference between round and round tubes?
Round steel is solid and round tubes are hollow
Q:How are steel pipes affected by international trade policies?
Steel pipes can be significantly affected by international trade policies. For instance, trade barriers such as tariffs or quotas can increase the cost of importing steel pipes, making them less competitive compared to domestically produced pipes. Conversely, liberalized trade policies can enhance market access for steel pipe exporters, allowing them to expand their market share globally. Overall, the impact of international trade policies on steel pipes depends on the specific policies implemented and their effect on the cost, availability, and competitiveness of these products in the international market.
Q:What does "DN25 PN16" mean?
DN is nominal diameter, nominal diameter (or nominal diameter), that is, all kinds of pipe and pipe accessories of universal caliber. The same nominal diameter of the tube and pipe accessories can connect with each other, with interchangeability. It is not a real sense of the pipe diameter or diameter, although its value is closer with the pipe diameter or equivalent; in order to make the tube, pipe connection size uniform, with nominal diameter (also called nominal diameter, nominal diameter).
Q:Is the same specification seamless steel pipe more expensive than welded pipe?
Specifications of the same kind of seamless steel pipe than welded pipe prices are generally about 30% high, large diameter difference is greater.
Q:What is the difference between carbon steel and alloy steel pipes?
The main difference between carbon steel and alloy steel pipes lies in their composition. Carbon steel pipes are primarily made from iron and carbon, while alloy steel pipes are made from iron, carbon, and other elements such as manganese, nickel, chromium, or molybdenum. Alloy steel pipes have enhanced mechanical properties and better resistance to corrosion, heat, and pressure compared to carbon steel pipes. Additionally, alloy steel pipes are typically used in more demanding applications where strength and durability are critical.
Q:How are steel pipes inspected for quality?
The quality of steel pipes undergoes a thorough examination process involving diverse techniques and standards. Trained professionals conduct visual inspections to scrutinize the pipes for visible defects such as cracks, dents, or surface irregularities. This examination guarantees that the pipes meet the required specifications and are devoid of any visible flaws. Furthermore, non-destructive testing (NDT) methods are utilized to assess the internal and external quality of the steel pipes. Among the commonly used NDT techniques, ultrasonic testing stands out. This method involves transmitting ultrasonic waves through the pipes to detect any internal defects or inconsistencies in the material. It effectively identifies issues such as variations in wall thickness, inclusions, or weld defects that could compromise the pipe's integrity. Another widely employed NDT technique is magnetic particle inspection. By utilizing magnetic fields and iron particles, this method identifies surface cracks or flaws in the steel pipes. It is particularly effective for detecting defects in ferromagnetic materials and can be performed on both the outer and inner surfaces of the pipes. Moreover, hydrostatic testing is frequently conducted to evaluate the strength and pressure resistance of the pipes. This process involves filling the pipes with water or a suitable fluid and subjecting them to a specified pressure to check for leaks or structural weaknesses. This test ensures that the pipes can withstand the intended operational conditions without failing. In addition to these techniques, various quality control measures are implemented throughout the manufacturing process. These measures include material traceability, dimensional checks, and chemical composition analysis. They play a crucial role in ensuring that the steel pipes meet the required standards and specifications, thereby guaranteeing their quality and reliability. In summary, the inspection of steel pipes for quality involves a comprehensive approach encompassing visual inspection, non-destructive testing methods, and quality control measures. These thorough procedures enable the identification of defects, inconsistencies, or weaknesses, ensuring that the pipes meet the necessary quality standards and are suitable for their intended purpose.

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