• Square Steel Pipe from Okorder in China with High Quality System 1
  • Square Steel Pipe from Okorder in China with High Quality System 2
  • Square Steel Pipe from Okorder in China with High Quality System 3
  • Square Steel Pipe from Okorder in China with High Quality System 4
  • Square Steel Pipe from Okorder in China with High Quality System 5
  • Square Steel Pipe from Okorder in China with High Quality System 6
Square Steel Pipe from Okorder in China with High Quality

Square Steel Pipe from Okorder in China with High Quality

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Loading Port:
Tianjin
Payment Terms:
TT or LC
Min Order Qty:
25 m.t.
Supply Capability:
1111 m.t./month

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1. Structure of Square Steel Pipe Description: 

    The square Steel pipes are used in structural projects, shelves, racks, trailers and in ornamental purpose. The framework made by square steel tubes, is used for providing support to the roof. This framework is also used as roof top ventilation baffles. With compare to round steel pipes, square steel pipes are little more efficient. The reason is that the square column is more efficient than the solid circular column.


2. Main Features of the  Square Steel Pipe: 

·Prompt delivery

·Time-saving 
·High quality 

·Competitive price 


3. Square Steel Pipe Images: 



 


4、Square Steel Pipe Specification: 

Standard

JIS,GB,DIN,ASTM

JIS G3466, GB/T 3094-2000, DIN EN 10216-1-2004, ASTM A513-2007

Grade 

Cr-Mo alloy, 16Mn, A53-A369, Q195-Q345

30CrMo, 16Mn, A106(B,C), Q235, Q345, Q195, Q215

Thickness0.5 - 30 mm
Outer  Diameter10x10---600x600
TechniqueCold Drawn
ApplicationStructure Pipe
Certification
ISO9001
Surface TreatmentGalvanized


Cold rolled square pipe:

1) Size: different sizes according to customers' requirement
2) Grade: many different kinds of materials.

3) Standard: GB50205-2001, JIS, ASTM and EN
4) Detailed requirement please feel free to contact

5)Specification:GB6728,DIN,JIS,ASTM-A500

6).Grade:Q195,Q235,Q345,ST37-2,ST52-3,SS400,SS355


Length: 5.8m, 6m, 12m

size

thickness

15*15

0.6—1.2

18*18

0.6—1.5

19*19

0.6—1.5

20*20

0.6—1.5

25*25

0.7—1.5

30*30

0.6—2.0

32*32

0.7—3.0

38*38

0.6—2.0

40*40

0.7—3.0

45*45

0.6—2.0

50*50

0.8—3.0

60*60

0.8—4.0

75*75

1.4—3.75

80*80

1.4—4.0

100*100

1.2—6.0

110*110

4.0—8.0

120*120

4.0—8.0

130*130

4.0—8.0

140*140

4.0—8.0

150*150

4.0—8.0

160*160

4.0—8.0

170*170

4.0—8.0

180*180

4.0—8.0

190*190

4.0—10.0

200*200

4.0—10.0

 

 

Q:How are steel pipes inspected for compliance with industry standards?
Steel pipes are inspected for compliance with industry standards through various methods such as visual examination, non-destructive testing techniques like ultrasonic testing, magnetic particle inspection, and radiography. These inspections help ensure that the pipes meet required specifications and quality standards, ensuring their integrity and safety for use in various industries.
Q:How long do steel pipes typically last?
Steel pipes typically last for several decades, with an average lifespan ranging from 50 to 100 years depending on various factors such as usage, maintenance, and environmental conditions.
Q:What is the role of steel pipes in the transportation of petroleum products?
Steel pipes have a crucial function in the transportation of petroleum products, as they are specifically designed to endure the high pressure and extreme temperatures associated with oil and gas transportation. A primary responsibility of steel pipes in this process is to serve as a dependable and secure conduit for transporting petroleum products over long distances. They are utilized to construct pipelines that span hundreds or even thousands of miles, connecting oil fields, refineries, and distribution centers. Steel pipes are the preferred choice for this purpose because of their strength, durability, and resistance to corrosion. The high tensile strength of steel allows these pipes to withstand the immense pressure exerted by petroleum products as they flow through the pipelines. Additionally, steel pipes can endure extreme temperatures, ensuring the safe transportation of hot crude oil or refined petroleum products. Moreover, steel pipes possess a high resistance to corrosion, which is of utmost importance given the corrosive nature of petroleum products. To further enhance their corrosion resistance, the pipes are often coated with protective materials such as epoxy or polyethylene. This coating helps prevent leaks or ruptures that could cause environmental damage or safety hazards. Steel pipes also offer cost-effective and efficient transportation of petroleum products. They have a smooth interior surface, which reduces friction and allows for a more efficient flow of oil or gas. This, in turn, helps minimize energy consumption and maximize the throughput of the pipeline system. In conclusion, the main role of steel pipes in the transportation of petroleum products is to provide a reliable, secure, and efficient means of transporting oil and gas over long distances. They are designed to withstand high pressure, extreme temperatures, and corrosion, ensuring the safe and efficient delivery of petroleum products from production sites to refineries and distribution centers.
Q:How are steel pipes inspected for quality control?
Steel pipes are inspected for quality control through various methods such as visual inspection, dimensional measurement, non-destructive testing techniques like ultrasonic testing, magnetic particle testing, and hydrostatic testing. These inspections ensure that the pipes meet the required specifications, are free from defects, and possess the necessary strength and integrity.
Q:How are steel pipes protected against microbial corrosion?
Various methods are employed to safeguard steel pipes against microbial corrosion. One widely used technique entails applying coatings onto the surface of the pipes. These coatings act as a shield, effectively blocking the entry of microbes and their corrosive byproducts into the steel, thereby safeguarding it from degradation. Coatings like epoxy, polyethylene, and fusion bonded epoxy are frequently utilized to bestow this protection. Another method involves the use of corrosion inhibitors. These inhibitors are added to the fluid that flows through the pipes in order to impede microbial growth and prevent corrosion. They can be either organic or inorganic compounds that function by either eradicating the microbes or inhibiting their metabolic activity. Furthermore, ensuring proper maintenance and cleaning of the pipes is vital in preventing microbial corrosion. Regular inspections and cleaning routines aid in the elimination of any biofilms or microbial deposits that may have formed on the pipe's surface. This significantly reduces the likelihood of microbial corrosion and prolongs the lifespan of the pipes. In certain cases, cathodic protection may also be employed. This method entails utilizing sacrificial anodes or impressed current systems to supply a protective electrical current to the pipe. This current helps prevent the formation of corrosive microorganisms and shields the steel from corrosion. In summary, a combination of coatings, corrosion inhibitors, regular maintenance, and cathodic protection techniques are employed to protect steel pipes from microbial corrosion. By utilizing these strategies, the longevity and integrity of the pipes are ensured, benefiting various industries such as oil and gas, water supply, and sewage systems.
Q:Is there a weld on the outer wall of seamless steel tube?
Seamless steel pipe, not seamless steel pipe, seamless steel pipe, welded seam, how can it be called seamless pipe?. Tell you a method: measurement of wall thickness, multi test several points, if each point, that is because it is cold drawn pipe, seamless pipe, hot rolling, wall thickness may% by sample.
Q:Can the KBG25 steel tube hold 4 six types of cables?
Over five types of cables, the outer cross section is about 24 square millimeters, over six types of network cable for the outer cross section of about 35 square millimeters, so 35*4/490=28.57%, far more than 20%. Therefore, according to the norm, only 3 super six categories can be worn. If the distance is short and the joint is not enough, it can be laid like this, but it does not conform to the construction standard
Q:What is the average lifespan of steel pipes in different applications?
The lifespan of steel pipes in different applications can vary due to various factors, such as the quality of the steel, the environment in which they are used, and the maintenance and care they receive. Water supply lines typically have steel pipes that can last around 50 to 70 years on average. These pipes are often made of high-quality steel and experience less corrosive environments. However, the presence of corrosive substances, water chemistry, and soil conditions can significantly impact their lifespan. For industrial applications like oil and gas pipelines, steel pipes generally have a lifespan ranging from 20 to 50 years. These pipes are exposed to aggressive environments with high temperatures, pressure, and corrosive substances. Extending their lifespan can be achieved through regular inspections, maintenance, and corrosion protection measures. In construction applications, steel pipes used for structural purposes can last an average of 50 to 100 years or longer. These pipes are designed to withstand heavy loads and are often safeguarded by coatings or insulation to prevent corrosion. It's important to understand that these are average lifespans, and individual pipes may have shorter or longer lifespans depending on specific conditions. Ensuring the longevity of steel pipes in different applications can be achieved through regular inspections, maintenance, and timely repairs or replacements when necessary.
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.
Q:Can steel pipes be used in the oil and gas industry?
Indeed, the oil and gas industry commonly utilizes steel pipes. Renowned for their robustness, longevity, and resistance to corrosion, steel pipes are well-suited for the transportation and storage of diverse fluids and gases within this sector. They possess the ability to endure high pressure and extreme temperatures, which are frequently encountered during oil and gas operations. Moreover, the ease with which steel pipes can be welded together facilitates efficient assembly and maintenance. Consequently, steel pipes represent a dependable and economically sound option for the oil and gas industry.

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