High Quality Hollow Section-Rectangle Tubes

High Quality Hollow Section-Rectangle Tubes System 1

High Quality Hollow Section-Rectangle Tubes System 2

High Quality Hollow Section-Rectangle Tubes

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Loading Port:: China Main Port

Payment Terms:: TT or L/C

Min Order Qty:: 5 m.t. m.t.

Supply Capability:: Based On Order m.t./month

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High Quality Hollow Section-Square Tubes

Usage/Applications Of High Quality Hollow Section-Square Tubes:

It is widely used in building, machine, chemical equipment, automobile industrial, container, it is also applied to agriculture and mine machine.

Standard Of High Quality Hollow Section-Square Tubes：

ASTM A500, GB6728

Steel Grade Of High Quality Hollow Section-Square Tubes:

ASTM A500: A, B, C

GB6728：Q195，Q215，Q235，Q345

Size of High Quality High Quality Hollow Section-Square Tubes:

*Remark: Besides below sizes, we also can arrange production based on requirement of customers

Sizee(mm)	Thickness(mm)
20×10	0.6-1.0
25×12	0.6-1.0
38×19	0.6-1.5
50×25	0.6-1.5
50×30	1.6-3.0
60×40	1.5-3.5
75×50	1.5-4.0
80×40	1.5-4.0
100×50	2.0-6.0
100×60	2.0-6.0
100×75	2.0-6.0
120×60	3.0-6.0
120×80	3.0-6.0
125×50	3.0-6.0
125×75	3.0-6.0
150×50	3.0-6.0
150×75	3.0-6.0
150×100	4.0-12
160×80	4.0-6.0
175×100	4.0-12
200×100	4.0-12
200×150	4.0-12
250×150	5.0-12
300×200	5.0-12
400×200	5.0-12

Chemical Composition Of High Quality Hollow Section-Square Tubes (%)

Chemical Requirement
	Composition %
	Grade A		Grade B
	Heat	Product	Heat	Product
Element	analysis	analysis	analysis	analysis
Carbon max	0.26	0.3	0.22	0.26
Manganese max	…	…	1.4	1.45
Phosphorus, max	0.035	0.045	0.03	0.04
Sulfur max	0.035	0.045	0.02	0.03
Copper, when copper steel is specified, min	0.2	0.18	0.2	0.18
Where an ellipsis (...)appears in this table, there is no requirement
For each reduction of 0.01 percentage point below the specified maximum for carton, and increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50% by heat analysis and 1.6% by product analysis

Mechanical Properties Of High Quality Hollow Section-Square Tubes

Tensile Requirement
	Grade A	Grade B
Tensile strength, min, psi (Mpa)	48000 (400)	70000 (483)
Yield strength, min, psi (Mpa)	36000 (250)	50000 (345)
Elongation in 2 in. (50.8mm), min, %	23	23

GB6728：

Steel Grade	CHEMICAL COMPOSITION					MECHANICAL PROPERTIES
	C (%)	Si (%)	Mn (%)	P(%) Max	S (%) Max	YS(Mpa) Min	TS(Mpa) Min	El (%) Min
Q195	0.06-0.012	0.3	0.25-0.5	0.45	0.5	195	315	22
Q215	0.09-0.15	0.3	0.25-0.55	0.45	0.5	215	335	22
Q235	0.12-0.22	0.3	0.3-0.7	0.45	0.45	235	375	20
Q345	0.20	0.55	1.0-1.6	0.45	0.45	345	510	21

Packaging & Delivery Of H High Quality Hollow Section-Square Tubes:

Packed in bundles, each bundle with 6-8 steel stripes and 2 nylon strips Or one by one Or Nested into Containers

Hollow Section-Rectangle Tubes

Q: What is the purpose of a steel pipe coating?: The objective of applying a coating to a steel pipe is to safeguard it against corrosion and other environmental elements that may cause deterioration. By coating the pipe with a layer of material, a barrier is created between the steel and its surroundings, thereby averting direct contact and reducing the risk of corrosion. This is particularly crucial for pipes utilized in industries such as oil and gas, water distribution, and construction, where they encounter harsh conditions like moisture, chemicals, and extreme temperatures. Moreover, the coating improves the pipe's durability and longevity, guaranteeing its ability to withstand the demands of its intended use. In certain cases, specific types of pipe coatings can also possess insulation properties, which are valuable in applications where precise temperature control is essential to prevent heat loss or transfer. All in all, the primary purpose of a steel pipe coating is to safeguard the pipe, prolong its lifespan, and ensure optimal performance across various industries and environments.

Q: What are the different types of couplings used with steel pipes?: There are several types of couplings commonly used with steel pipes, including threaded couplings, slip-on couplings, welding couplings, and flanged couplings. Each type of coupling has its own specific method of connection and is chosen based on the requirements of the application and the pipe system.

Q: Can steel pipes be used for wastewater treatment systems?: Yes, steel pipes can be used for wastewater treatment systems. Steel pipes are commonly used in wastewater treatment systems due to their durability, corrosion resistance, and ability to handle high pressure and flow rates. Moreover, steel pipes can be easily welded, making them suitable for various configurations and applications within the wastewater treatment process.

Q: Theoretical weight of 25*25*1.5 square steel tubes: Theoretical weight can be directly from the steel tube under the table look up, you can also press type calculation:Weight per meter =4x, wall thickness x (side length - wall thickness) x0.00785. The length of the square tube and the wall thickness are in millimeters, and the weight of each square meter is in kilograms.

Q: How do steel pipes connect to other components?: Steel pipes can be connected to other components using various methods, including welding, threading, flanges, and couplings. These connections ensure a secure and leak-proof joint between the steel pipe and other components, allowing for efficient fluid or gas transfer in various industries.

Q: How are steel pipes insulated against heat loss?: There are multiple ways to insulate steel pipes to prevent heat loss. One widely used method involves utilizing insulation materials like mineral wool or fiberglass wraps. These materials are wrapped around the pipes, forming a barrier that reduces heat transfer. Another approach involves directly applying insulation coatings like foam or rubber coatings onto the pipe's surface. These coatings create a protective layer that minimizes heat loss. Additionally, thermal tape or heat-resistant tape can be employed to seal any gaps or joints in the insulation, ensuring a continuous barrier against heat loss. In summary, effectively insulating steel pipes is crucial to maintaining the desired temperature of the fluid or gas being transported and enhancing energy efficiency across diverse industries.

Q: What are the different methods of pipe welding for steel pipes?: There are several different methods of pipe welding for steel pipes, each with its own unique advantages and applications. Here are some of the most common methods: 1. Shielded Metal Arc Welding (SMAW): Also known as stick welding, SMAW is a manual welding process that uses a consumable electrode coated in flux. The electrode is melted to create the weld, and the flux creates a protective shield around the weld pool. SMAW is versatile and can be used in various positions, making it suitable for both field and workshop applications. 2. Gas Metal Arc Welding (GMAW): Commonly known as MIG (Metal Inert Gas) welding, GMAW uses a continuous wire electrode that is fed through a welding gun. The welding gun also supplies a shielding gas, such as argon or a mixture of argon and carbon dioxide, to protect the weld pool from atmospheric contamination. GMAW is known for its high welding speed and is often used in industrial applications. 3. Flux-Cored Arc Welding (FCAW): Similar to GMAW, FCAW uses a continuous wire electrode, but the wire is filled with flux instead of relying on an external shielding gas. The flux in the wire produces a protective shield around the weld pool, eliminating the need for a separate gas supply. FCAW is commonly used in outdoor and windy conditions as it provides better protection against atmospheric contamination. 4. Gas Tungsten Arc Welding (GTAW): Also known as TIG (Tungsten Inert Gas) welding, GTAW uses a non-consumable tungsten electrode to create the weld. The weld pool is protected by a shielding gas, typically argon, which is supplied separately. GTAW produces high-quality welds with excellent control, making it suitable for critical applications where precision is crucial. 5. Submerged Arc Welding (SAW): SAW is an automated welding process that uses a continuously fed wire electrode and a granular flux that is poured over the weld joint. The arc is submerged beneath the flux, providing excellent protection against contamination. SAW is commonly used in heavy fabrication and pipeline industries due to its high deposition rates and deep penetration capabilities. These are just a few of the different methods of pipe welding for steel pipes. The choice of method depends on factors such as the application, material thickness, desired weld quality, and available equipment. It is important to select the appropriate welding method to ensure strong, durable, and reliable welds in steel pipe applications.

Q: What are the dimensions of steel pipes?: The dimensions of steel pipes can vary depending on the specific requirements and industry standards. However, steel pipes typically have standardized dimensions in terms of their outer diameter (OD), wall thickness, and length. The outer diameter of steel pipes can range from small sizes, such as ¼ inch (6.35 mm) or ⅛ inch (3.175 mm), to larger sizes like 48 inches (1219.2 mm) or even more for specialty applications. The wall thickness of steel pipes can also vary greatly, with options ranging from thin-walled pipes with a few millimeters of thickness to thick-walled pipes with several inches of thickness. In terms of length, steel pipes are typically produced in standard lengths of 20 feet (6.1 meters) or 40 feet (12.2 meters). However, custom lengths can also be manufactured based on specific project requirements. It is important to note that these dimensions are just general examples and may not cover all the possible variations in steel pipe sizes. Therefore, it is always recommended to consult relevant industry standards and specifications to determine the precise dimensions required for a particular application.

Q: What are the environmental impacts of steel pipe production and disposal?: Significant environmental impacts are associated with the production and disposal of steel pipes. First and foremost, the production of steel pipes necessitates the extraction of raw materials such as iron ore, coal, and limestone. This extraction process leads to the destruction of habitats, deforestation, and soil erosion. Furthermore, mining and processing these materials require a substantial amount of energy, often derived from fossil fuels, which contributes to the emission of greenhouse gases and air pollution. The manufacturing process itself encompasses various stages, such as melting, casting, rolling, and coating, all of which demand considerable energy inputs and emit substantial quantities of carbon dioxide and other greenhouse gases. Additionally, the production of steel pipes involves the utilization of chemicals and additives that can pose harm to the environment if not properly managed. Moreover, if steel pipes are not recycled or appropriately dealt with during disposal, they can end up in landfills, thus contributing to waste accumulation and occupying valuable space. Steel is typically non-biodegradable and can take hundreds of years to decompose. When steel pipes are dumped in landfills, they can release toxic substances and heavy metals, which can contaminate soil and groundwater. Nevertheless, it is important to acknowledge that steel pipes are highly recyclable, and recycling them significantly mitigates the environmental impact. Recycling steel pipes aids in the conservation of natural resources, reduces energy consumption, and lowers greenhouse gas emissions. Additionally, using recycled steel in the production of new pipes requires less energy and results in fewer emissions compared to using virgin materials. To minimize the environmental impacts of steel pipe production and disposal, it is crucial to advocate sustainable practices throughout the entire lifecycle of the product. This entails reducing energy consumption, utilizing renewable energy sources, implementing proper waste management strategies, and encouraging the recycling and reuse of steel pipes.

Q: What is the difference between steel pipe and aluminum pipe?: Steel pipes and aluminum pipes differ primarily in their composition and physical properties. Steel pipes are composed of iron and carbon, with added elements for strength and corrosion resistance. In contrast, aluminum pipes are made entirely of lightweight and highly corrosion-resistant aluminum. The weight of the pipes is a significant distinction. Steel is denser than aluminum, making steel pipes heavier and more robust. This characteristic makes steel pipes ideal for applications requiring structural strength and load-bearing capabilities. On the other hand, aluminum pipes offer advantages due to their lightweight nature. They weigh only about one-third of steel pipes, making them easier to handle, transport, and install. This lightweight property is especially beneficial in industries such as aerospace and automotive, where weight reduction is crucial. Corrosion resistance is another important consideration. Steel pipes are prone to rust and corrosion, especially in moist or corrosive environments. To address this issue, steel pipes are often coated or galvanized. In contrast, aluminum pipes naturally resist corrosion due to the formation of a protective layer of aluminum oxide on their surface. Cost is also a factor to consider. Generally, steel pipes are more cost-effective due to lower raw material and manufacturing costs. However, long-term maintenance costs and lifespan may vary between steel and aluminum pipes, so specific requirements and durability should be taken into account. In conclusion, the difference between steel and aluminum pipes lies in their weight, strength, corrosion resistance, and cost. Steel pipes are heavier, stronger, and more prone to rust and corrosion but are generally more cost-effective. Aluminum pipes are lightweight, corrosion-resistant, and costlier but offer advantages in weight reduction and specific applications requiring corrosion resistance. The choice between steel and aluminum pipes depends on the project's needs and desired properties for optimal performance.

The company has successively passed ISO9000 quality system, the American Petroleum Institute API, and also earned the environment healthy license, national special equipment manufacturing license.

1. Manufacturer Overview

Location	Hebei, China
Year Established	1988
Annual Output Value	Above One Hundred Million RMB
Main Markets	Main land; Southeast Asia; Middle East; Africa
Company Certifications	ISO 9002:2010；API 5L

2. Manufacturer Certificates

a) Certification Name
Range
Reference
Validity Period

3. Manufacturer Capability

a) Trade Capacity
Nearest Port	Tianjin
Export Percentage	30%-50%
No.of Employees in Trade Department	201-500 People
Language Spoken:	English; Chinese
b) Factory Information
Factory Size:	50,000 square meters
No. of Production Lines	Above 15
Contract Manufacturing	Meicai Metal Trading Co.Ltd
Product Price Range	Average