Carbon Steel Flanges
Chuxin Flange Fitting Co., Ltd., formerly known as Yongxing Jinggong Pipe Fitting Factory, founded in 1994, is a non-regional high-tech enterprise specializing in the design, development, production, sales and after-sales of carbon steel flanges. We provide carbon steel 8 character blind plate, carbon steel DIN neck flat welding flange, carbon steel JIS butt welded steel pipe flange and other products which are sold well all over the country and exported to overseas countries and regions.
Why Choose Us
Quality Control
In order to offer premium-quality products, Chuxin provides advanced inspection devices and complete inspection measures, builds a strict QC team to realize the quality control during the whole process from raw materials inspection, process detection to finished products and application.
Advanced Equipment
Our company has processing equipment and advanced testing instruments including hundreds of high-precision CNC lathes and desktop spectrometers, portable spectrometers, universal testing machines, impact testing machines, ultrasonic flaw detectors, metallographic detectors, Rockwell hardness testers, low-temperature cryogenic treatment tanks, etc.
Technology Certification
Our products are produced and inspected strictly in accordance with GB, AISI, ASTM, API, JIS, BS so as to control and safeguard the quality of products. We successively obtained ISO9001-2008 quality control system and CE (2014/68/EU) certification and API certification.
Professional after-sales service
Ensure the normal operation of the entire process from manufacturing to sales, the professional technical team is efficient and the after-sales service can meet the higher requirements of the third customers.
Types of Carbon Steel Flanges
Carbon Steel JIS Neck Flange
The neck height is high, which improves the rigidity and load carrying capacity of the flange. It is easy to install on site and can save the process of welding damage, so it is more popular.
Carbon Steel Lap Joint Flange
A lap joint flange, abbreviated as LJF, is a flange that consists of two parts, a stub end and the backing flange. On a Lap Joint, the flange slides over the pipe and the stub end is the connection where the gasket sits.
Carbon Steel Socket Welding Flange
The socket weld flange refers to a flange that is inserted into the flange ring step at the end of the pipe and welded at the pipe end and the outside. There are two types of neck and no neck.
Carbon Steel Threaded Flange
The threaded flange is a kind of non welding flange, which is punched in the middle of the flange, the round hole is processed into pipe thread, and then the threaded flange and the threaded pipe are used together.
Carbon Steel Welding Neck Flange
Butt welding flange is a kind of pipe fitting. It refers to the flange with neck, which has a round pipe and is connected with the pipe by butt welding. Butt welding flanges are not deformed.
Carbon Steel DIN Cover Flange
A carbon steel DIN cover flange is a flange made of carbon steel that conforms to the Deutsche Industrie Norm (DIN) standards for flange fittings.
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Standards Specification Of |
Carbon Steel Flanges |
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Manufacturing Shapes |
RTJ,FF, Raised Face, Lap-Joint Face, Large Tongue & Groove And Small Tongue Groove, Large Male-Female And Small Male-Female |
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Size Chart |
1/2" to 48" |
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High Temperature Of Flanges |
Above 200°C (400°F) For 150LB Or Above 400°C (750°F) |
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Low Temperature Of Flanges |
Above -29 °C (−20°F) |
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Manufacturer Of Japanese Standards |
5K, 10 K, 40 K, 16 K 20 K 30 K, 63 K |
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Materials |
Stainless Steel, Carbon Steel, Inconel, Hastelloy, Copper Nickel, Cast Iron, Alloy Steel, Mild Steel, Duplex Steel & Super Duplex Steel, Wrought Iron. |
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Flanges Thickness |
NPS ≤ 18 |
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Bore Diameter Of Flange |
NPS ≤ 10 |
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Flanges Standards |
MSS S44, ISO70051, ASME B16.36, DIN, BS1560-3.1, API7S-15, API, ISO, UNI, EN-1092, ANSI/ASME B16.5, B16.47 Series A & B, ASME B16.48, AWWA C207, IS 2062, EN1092, API7S-43, API605, BS4504 |
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ASME B16.5 Ratings |
150, 300, 400, 600, 900, 1500, 2500 |
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Manufacturer Of Most common types |
Threaded / Screwed / Forged / Plate |
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Production Technique |
Forged, HEAT Treated and Machined |
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ASME & ANSI Flange Types |
Slip-On, Weld Neck, Blind, Lap Joint, Threaded, Socket-Weld |
Robust and Durable: These are renowned for their durability. Their ability to withstand high pressures and industrial conditions makes them a reliable choice for essential applications.
Cost Savings: The longevity of the best carbon steel flanges translates into cost savings over time, as they require less frequent replacements than other materials.
High Tensile Strength: The inherent material properties of carbon steel, including high tensile strength, make these flanges suitable for heavy-duty applications.
Compatibility with High-Pressure Systems: Designed to withstand specific pressure ratings, carbon steel flanges are well-suited for applications requiring high-pressure fluid flow.
Versatility in Applications: With various sizes and dimensions, carbon steel flanges offer versatility for diverse industrial applications.
Applications of Carbon Steel Flanges
Oil and gas industry
Carbon steel flanges are extensively used in the oil and gas industry for piping systems, where they provide a reliable and leak-proof connection between pipes and other equipment.
Chemical industry
Carbon steel flanges are commonly used in the chemical industry for the handling and transportation of various chemicals.
Power generation
Carbon steel flanges are used in power plants for connecting pipes and valves in steam, water, and fuel systems.
Construction industry
Carbon steel flanges are used in construction projects for connecting pipes and fittings in plumbing and HVAC systems.
Automotive industry
Carbon steel flanges are used in the automotive industry for various applications, including exhaust systems, fuel delivery systems, and engine components.
Food processing field
Carbon steel flanges also play an important role in the connection of equipment such as food delivery pipelines, reactors and storage tanks.
Galvanized Finish: A layer of zinc is applied to protect the flange from corrosion.
Black Oxide Finish: A chemical coating that provides mild corrosion resistance and an aesthetically pleasing black finish.
Anti-Rust Oil Coating: A temporary protective layer applied to prevent rust during storage and transportation.
Painted Finish: Carbon steel flanges are coated with industrial-grade paint to prevent corrosion and improve appearance.
Phosphate Coating (Parkerizing): A chemical treatment creates a protective layer of phosphate crystals on the surface.
Pickling and Passivation: The flange is treated with acid solutions to remove rust, scale, and other impurities, leaving a clean, smooth surface.
Powder Coating: A dry powder is electrostatically applied and baked to form a hard, protective coating.
Chrome Plating: A thin layer of chromium is electroplated onto the flange surface.
Sandblasted Finish: The surface is blasted with abrasive materials to create a rough texture.
The Difference Between Carbon Steel Flanges and Stainless Steel Flanges
The main difference between carbon steel and stainless steel flanges comes from their chemical composition, which directly affects their performance and fit.
Carbon steel flanges are made primarily from iron and carbon, with small amounts of other elements like manganese and silicon. The carbon content usually ranges between 0.05% and 2.0%, influencing their strength, hardness, and flexibility. This material is well-known for its high mechanical strength, making it suitable for heavy-duty applications.
Stainless steel flanges contain a higher percentage of chromium (at least 10.5%) and often include other elements like nickel and molybdenum. The chromium forms a passive oxide layer that provides excellent corrosion resistance, even in aggressive environments. The nickel and molybdenum further enhance its resistance to pitting, crevice corrosion, and high temperatures.
Wear Personal Protective Equipment (PPE) Always wear appropriate PPE, such as gloves and safety glasses, during installation.
Do Not Overload Avoid using the flange as a support for any additional weight or equipment.
Clean Surfaces Ensure that the flange faces and the pipe ends are clean and free from debris, rust, or any contaminants that could affect the seal.
Proper Alignment Ensure that the flanges are properly aligned before tightening. Misalignment can lead to stress and potential failure.
Follow Torque Guidelines
Always follow the manufacturer's torque specifications for bolting.
Anti-Seize Lubricants
Be cautious about using too much, as it can affect torque readings.
Re-Torque if Necessary
After the system has been in operation for a short period, it may be beneficial to re-check and re-torque the bolts to ensure the integrity of the joint.
Customization Process
Initial Inquiry & Consultation
An initial discussion your requirements with our engineering or sales team. We may may suggest adjustments or recommend optimal solutions based on your product details.
Material Selection
Specify the material grade and desired properties (e.g., strength, corrosion resistance). If uncertain, our team can recommend suitable materials.
Quote & Proposal
Feasibility of the design. Production process (open-die, closed-die, ring rolling, etc.). Material availability and lead times. Once evaluated, the sales team will provide a detailed quote.
Customer Approval
Review the quotation and purchase order will be sent by email to confirm the order. Include any additional instructions or special conditions.
Contract Agreement
If applicable, sign a formal agreement outlining responsibilities, timelines, and warranties.
Manufacturing
Utilize processes such as forging, cutting, machining, and heat treatment to shape and refine the flange to the desired specifications.
Quality Inspection
Conduct dimensional checks, non-destructive testing (NDT), and mechanical property testing to ensure the flange meets quality standards.
Packaging and Delivery
The flange product is packed securely to prevent damage during transit. Products are labeled with relevant information, such as material grade, part number, and order details.
Delivery Time: For stocks, we can send the goods to loading port within 7 days after receiving your deposit. For production period, it usually needs about 10days- 30days after receiving the deposit.
Package: Our staff wrapped flanges fittings with plastic foam individually, put them into wooden cases or pallets, bundled wooden cases with nylon rope.
Shipping Method: We offer sea and air shipping methods depending on your order quantity.
Payment Terms: Accepted payment methods are L/C, T/T, Paypal and Western Union.
MOQ: 1 pieces.
FAQ
We're well-known as one of the leading carbon steel flanges manufacturers in China. Please feel free to buy customized carbon steel flanges at competitive price from our factory. Contact us for more cheap products.
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