ASTM A795/A795m Carbon Steel Tubes Used in Nfrastructure and Utility Industry

• Customization: Available
• Application: Chemical Industry, Construction Industry, Oil and Gas Industry
• Certification: CE, ISO9001
• Model NO.: ASTM A795/A795M Carbon Steel Tubes
• Elongation: as Per Client′s Design
• Length: Custom Length
• Outer Diameter: Sch5s - Schxxs(1mm - 150mm)
• Schedule: GB13296, GB5310, GB6479
• tensile strength: as Per Products
• Wall Thickness: as Per Client′s Design
• Name: ASTM A795m Seamless Carbon Steel Tubes
• Steel Grade: A795/795m/A90/A700
• Manufacturer: Seamless
• Process: Polished/Solution Treatment
• Condition: Hot Finished/Cold Finished
• End: Plain End/Bevel End
• Test: BV, SGS Is Available
• Stock: Size Can Customized
• Processing: Customized
• Thickness: 1-150mm
• Used: Factory, Decoration, Food
• Packing: Standard Export Packing
• Delivery Time: 10-30 Working Days
• Size: 1/4"-4"
• MOQ: 1
• Transport Package: Woven Bag/Wooden Case
• Specification: SCH 5S-SCH160
• Trademark: EZS
• Origin: China
• Production Capacity: 10, 000, 000 Kgs/Year

Product Description

Product Description

 

Property	ASTM A795/A795M Carbon Steel Tubes Specifications
Material Standard	ASTM A795/A795M (Standard Specification for Steel Tubes, Low-Carbon or Iron, for Fire Protection Systems)
Material Grades	Low-Carbon Steel (Grade A, B) or Iron
Chemical Composition	C: ≤0.30%, Mn: ≤1.20%, P: ≤0.035%, S: ≤0.035%, Cu: ≥0.20% (for corrosion-resistant coatings)
Mechanical Properties	Tensile Strength: ≥330 MPa (Grade A), ≥415 MPa (Grade B) Yield Strength: ≥205 MPa (Grade A), ≥240 MPa (Grade B)
Dimensions	Size Range: 1/2" to 8" (DN15 to DN200) Wall Thickness: Sch 10, Sch 40 (ASME B36.10)
Manufacturing Process	Electric-Resistance Welded (ERW) or Seamless (SMLS) Hot-Dip Galvanized (HDG) or Zinc-Coated for corrosion resistance
Temperature Range	-29°C to 260°C (-20°F to 500°F)
Key Features	- Fire sprinkler system compliance (NFPA 13) - Lightweight, cost-effective - Zinc-coated for rust prevention
Applications	Fire protection systems, water supply pipelines, low-pressure plumbing, HVAC
Standards Compliance	NFPA 13, UL Listed, FM Approved
Surface Finish	Hot-dip galvanized (HDG), pre-galvanized, or black finish (ungalvanized)
Testing & Certification	Hydrostatic testing, visual inspection, coating thickness verification (galvanized tubes)

1. Material Differences:

   • Grade A: General-purpose low-carbon steel for standard pressure.

   • Grade B: Higher strength for demanding installations.

2. Coating Requirements:

   • Zinc coating (≥610 g/m² for HDG) ensures corrosion resistance in wet environments.

3. Key Applications:

   • Primarily used in fire sprinkler systems due to compliance with NFPA 13 and UL/FM certifications.

4. SEO Keywords:

   • "ASTM A795 Fire Sprinkler Tubes," "Galvanized Carbon Steel Pipes," "Low-Pressure ERW Steel Tubes."

5. Competitive Advantages:

   • Cost-effective alternative to stainless steel for non-corrosive environments.

   • Pre-galvanized options reduce installation time and maintenance costs.

6. Compliance Focus:

   • Highlight certifications (UL, FM) for fire safety systems to target construction and safety engineers.
      

Product Introduction of ASTM A795/A795M Carbon Steel Tubes

1. Product Overview

ASTM A795/A795M standards are designed for electric - resistance - welded (ERW) carbon - steel mechanical tubing. The "M" in A795M indicates that it follows the metric system. These carbon - steel tubes are produced to meet the mechanical and dimensional requirements for a wide range of applications, offering a cost - effective solution due to the prevalent use and relatively low cost of carbon steel. They are used in scenarios where structural integrity and the ability to handle certain loads or fluids are essential.

2. Material Characteristics

2.1 Chemical Composition

• Carbon Content: The carbon content in ASTM A795/A795M carbon - steel tubes typically falls within a range that provides a balance between strength and formability. Although the exact percentage can vary, it is generally low enough to ensure good workability during manufacturing processes such as bending and welding. This low - to - medium carbon content allows the steel to be easily shaped into the desired tube form without excessive brittleness.

• Alloying Elements: Iron forms the base of the material. Small amounts of manganese are often added to enhance the steel's strength and hardenability. Manganese helps in improving the overall mechanical properties, making the tubes more resistant to deformation under load. Additionally, trace elements like silicon may be present. Silicon contributes to the steel's resistance to oxidation and can improve its performance in certain environmental conditions, especially those with some level of humidity or exposure to mild corrosive substances.

2.2 Mechanical Properties

• Strength: These carbon - steel tubes exhibit a reasonable tensile strength, which enables them to withstand the pulling forces exerted during installation and in service. The yield strength is also significant, indicating the stress level at which the material starts to deform plastically. This property is crucial as it determines the maximum load the tubes can bear without permanent damage. In applications where the tubes are used for structural support or fluid transportation under pressure, their strength properties ensure reliable performance.

• Ductility: Good ductility is a characteristic of the carbon steel in these tubes. It allows the tubes to be bent, flanged, or otherwise formed into the required shapes during the manufacturing and installation processes. Ductility also helps the tubes absorb some degree of stress and deformation without cracking, enhancing their durability in the face of mechanical stress and environmental factors.

• Hardness: The hardness of the carbon - steel tubes is appropriate for their intended applications. It provides resistance to wear and abrasion, which is important when the tubes are in contact with flowing fluids that may contain solid particles or when they are subject to mechanical friction during use.

3. Design Features

3.1 Dimensions

• Standardized Sizes: ASTM A795/A795M clearly defines the dimensions of the tubes, including outer diameter, wall thickness, and length. The outer diameter can vary widely, from small sizes suitable for applications in delicate machinery to larger diameters used in industrial pipelines. Precise dimensional control is maintained to ensure compatibility with different fittings, valves, and other components in a system. This standardization allows for easy integration of the tubes into existing or new setups, reducing installation time and costs.

3.2 Pressure Ratings

• Operating Pressures: The tubes are designed to operate within specific pressure ranges. The pressure rating depends on factors such as the wall thickness and the material's mechanical properties. Generally, they can handle moderate pressures, making them suitable for applications like water supply systems, some industrial fluid - transfer lines, and in certain structural applications where internal pressure from fluids or gases may be present. However, for high - pressure applications, appropriate selection of tube size and wall thickness, as well as additional safety measures, may be required.

4. Manufacturing Process

4.1 Electric - Resistance - Welding (ERW)

• Tube Formation: In the production of ASTM A795/A795M tubes, a strip of carbon - steel is first formed into a tubular shape. This is typically done through a series of rollers that gradually bend the strip into a circular or other required cross - sectional shape. Once the strip is formed into a tube, the edges are joined using the electric - resistance - welding process. In ERW, an electric current is passed through the edges of the tube, generating heat that fuses the two edges together. This method results in a relatively strong and reliable weld joint, suitable for many applications.

4.2 Finishing Operations

• Surface Treatment: After welding, the tubes may undergo various finishing operations. This can include cleaning the surface to remove any welding slag or impurities. Additionally, a surface treatment such as painting, galvanizing, or applying a protective coating may be carried out. These treatments help to enhance the corrosion resistance of the tubes, especially in environments where they may be exposed to moisture, chemicals, or other corrosive agents.

• Straightening and Cutting: The tubes are then straightened to ensure they are straight and true. This is important for applications where precise alignment is required. Finally, the tubes are cut to the desired lengths as specified by the standard or the customer's requirements.

5. Quality Control

5.1 Material Testing

• Composition Verification: Before manufacturing, the incoming carbon - steel material is thoroughly tested. Chemical analysis, often using spectroscopy techniques, is performed to ensure that the steel composition adheres to the ASTM A795/A795M standards. Any deviation in chemical composition can significantly affect the tube's mechanical properties, corrosion resistance, and overall performance.

• Mechanical Property Testing: Mechanical property testing, including tensile testing, hardness testing, and bend testing, is also carried out. Tensile testing determines the maximum stress the material can withstand before breaking. Hardness testing measures the material's resistance to indentation, while bend testing assesses the material's ability to be bent without cracking. These tests ensure that the steel has the appropriate strength, hardness, and ductility for its intended application.

5.2 Weld Quality Inspection

• Visual and Non - destructive Testing: Since the tubes are welded using the ERW process, the quality of the weld is of utmost importance. Visual inspection is first carried out to check for any obvious defects such as cracks, porosity, or misalignment in the weld area. Non - destructive testing methods are then employed. Ultrasonic testing can be used to detect internal flaws in the weld, such as hidden cracks or voids. Eddy - current testing can be used to detect surface - breaking defects in the welded area. These tests help to ensure the integrity of the weld joint and the overall quality of the tube.

5.3 Dimensional Inspection

• Precision Measurements: During and after the manufacturing process, dimensional inspection is crucial. Precision measuring tools such as calipers, micrometers, and laser - based measuring systems are used to check the dimensions of the tubes. Parameters like outer diameter, wall thickness, and length are measured to ensure compliance with the standard specifications. Any deviation from the specified dimensions can lead to improper fit in the system and affect the overall performance of the tube.

6. Applications

6.1 Construction Industry

• Structural Applications: In building construction, ASTM A795/A795M carbon - steel tubes are used as structural components. They can be part of the framework of buildings, providing support for floors, walls, and roofs. Their strength and ductility make them suitable for withstanding the loads imposed by the building structure and the forces of nature, such as wind and seismic loads. For example, they may be used in the construction of industrial sheds, where their relatively low cost and good mechanical properties make them an ideal choice for large - span structures.

• HVAC and Plumbing Systems: These tubes are also used in heating, ventilation, air - conditioning (HVAC), and plumbing systems within buildings. In HVAC systems, they can be used for air ducts, where they need to transport air under pressure. In plumbing systems, they can be used for water supply and drainage lines. Their ability to withstand the internal pressure of water flow and their resistance to corrosion (enhanced by surface treatments) make them suitable for these applications.

6.2 General Industrial Applications

• Manufacturing Machinery: In manufacturing plants, these carbon - steel tubes are used in the construction of machinery. They can serve as structural elements within the machinery, providing support and stability. Additionally, they may be used in the fluid - handling systems of the machinery, such as in hydraulic or pneumatic systems where they transport fluids under pressure to power various mechanical operations. For example, in a metal - stamping machine, the tubes may be used to form the frame and also to transport hydraulic fluid.

• Agricultural Equipment: In the agricultural industry, ASTM A795/A795M carbon - steel tubes are used in the construction of agricultural equipment. They can be part of irrigation systems, where they transport water to fields for crop watering. Their durability and ability to withstand the outdoor environment, including exposure to sunlight, moisture, and temperature variations, make them suitable for this application. They may also be used in the construction of tractors and other farming machinery, providing structural support and being part of the fluid - transfer systems within the equipment.

In conclusion, ASTM A795/A795M carbon - steel tubes are versatile products used in a wide range of industries. Their material properties, design features, manufacturing processes, and quality - control measures are optimized to meet the diverse requirements of different applications, providing reliable and cost - effective solutions.

 

 

NPS Designator	Inch	mm	Inch	mm	lb/ft	kg/m	psi	MPa	psi	MPa

3/4	1.05	-26.7	0.083	-2.11	0.86	-1.28	500	-3.45	700	-4.83
1	1.315	-33.4	0.109	-2.77	1.41	-2.09	500	-3.45	700	-4.83
1 1/4	1.66	-42.2	0.109	-2.77	1.81	-2.69	500	-3.45	1000	-6.89
1 1/2	1.9	-48.3	0.109	-2.77	2.09	-3.11	500	-3.45	1000	-6.89
2	2.38	-60.3	0.109	-2.77	2.64	-3.93	500	-3.45	1000	-6.89
2 1/2	2.88	-73	0.12	-3.05	3.53	-5.26	500	-3.45	1000	-6.89
3	3.5	-88.9	0.12	-3.05	4.34	-6.46	500	-3.45	1000	-6.89
3 1/2	4	-101.6	0.12	-3.05	4.98	-7.41	500	-3.45	1200	-8.27
4	4.5	-114.3	0.12	-3.05	5.62	-8.37	500	-3.45	1200	-8.27
5	5.56	-141.3	0.134	-3.4	7.78	-11.58	B	B	1200	-8.27
6	6.63	-168.3	0.134	-3.4	9.3	-13.85	B	B	1000	-5.51
8	8.63	-219.1	0.188C	-4.78	16.96	-25.26	B	B	800	-4.83
10	10.75	-273.1	0.188C	-4.78	21.23	-31.62	B	B	700	-6.89
A:Schedule 10 corresponds to Schedule 10S as listed in ANSI B 36.19 for NPS 3⁄4 through 6 only.
B:Furnace-welded pipe is not made in sizes larger than NPS 4.
C:Not Schedule 10.

 

 

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