STAS Flanges

Understanding your choice of STAS flanges options

When it comes to choosing the right flanges for your industrial piping system can be a daunting task. The right flange choice can make all the difference in the efficiency, durability, and safety of your system. In this post, we will focus on understanding your choice of STAS flange options.

What are STAS flanges?

STAS flanges refer to a standard for flanges used in piping systems that comply with the Standardul Tehnic al Armatei din Romania (STAS). These flanges are widely utilized across multiple industries such as oil and gas, chemical, and petrochemical.

Flange Face Finish

Flange face finish is a crucial factor in ensuring proper sealing between flange connections. There are several types of flange face finishes available, each with its unique characteristics and benefits.
Types of Flange Face Finish
One type of flange face finish is the serrated finish. This finish is created by machining a series of grooves into the flange face, providing better grip and improved sealing when compressed. Serrated finishes are commonly used in applications where the flange connection may be subject to vibration or movement.
Another type of flange face finish is the stock finish. This is the default finish provided by the manufacturer, and it typically has a smooth surface. While it may not offer the same grip as a serrated finish, a stock finish is suitable for many standard applications.

Spiral serrated finishes feature a spiral pattern of grooves that helps to distribute stress evenly across the flange face. This can help to prevent damage and distortion, which can lead to leaks or other issues.

Concentric serrated finishes are similar to spiral serrated finishes but feature a series of concentric rings around the flange face. This pattern can provide enhanced sealing and grip compared to other types of serrated finishes.

Finally, a smooth finish is another option for flange face finish. Smooth finishes are often used in applications where the flange connection is not subject to significant movement or vibration. While it may not offer the same grip as a serrated finish, a smooth finish can still provide a reliable seal in many standard applications.

For example:

Machining of gasket faces of flanges to a smooth finish of Ra = 3.2 – 6.3 micrometer

(= 125 – 250 microinches AARH)

• AARH stands for Arithmetic Average Roughness Height. It is used to measure the roughness (rather smoothness) of surfaces. 125 AARH means 125 micro inches will be the average height of the ups and downs of the surface.
• 63 AARH is specified for Ring Type Joints.
• 125-250 AARH (it is called smooth finish) is specified for Spiral Wound Gaskets.
• 250-500 AARH (it is called stock finish) is specified for soft gaskets such as NON Asbestos, Graphite sheets, Elastomers etc. If we use smooth finish for soft gaskets enough “biting effect” will not occur and hence the joint may develop leak.
• Sometimes AARH is referred also as Ra which stands for Roughness Average and means the same.

Selecting the appropriate flange face finish is essential to ensuring a proper seal between flange connections. Whether you choose a serrated finish, stock finish, spiral serrated, concentric serrated, or smooth finish, it is important to consider the specific application and potential stresses that the flange connection may face. By selecting the right finish for the job, you can help to prevent leaks and other issues that can lead to costly downtime and repairs.

Standard Specication For STAS Flanges

• Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, STAS, ASA, API-605, AWWA, Custom Drawings
• Size : 1/2″ (15 NB) to 48″ (1200NB)
• Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
• DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629,
• DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
• BS : BS4504 , BS4504, BS1560, BS10
• Flange Face Type : Flate Face (FF), Raised Face(RF), Ring Type Joint (RTJ)

Material of STAS Flanges

STAS Flanges are typically made from a variety of materials, depending on the specific application and desired property. some common materials for STAS Flanges include steel, stainless steel, cast iron, brass, and aluminum. Material selection is typically based on factors such as temperature, pressure, corrosiveness of the fluid or gas being conveyed, and any regulatory requirements or industry standards that may apply. Some common materials used for STAS flanges include:

Size of STAS Flanges

STAS flanges are typically available in sizes ranging from DN 10 to DN 600 in diameter. However, the exact size availability may vary depending on the manufacturer and the specific requirements of the application.

Dimensions of STAS Flanges

The dimensions of STAS flanges may vary depending on the specific standard and type of flange.

Flat Flanges According to Romanian Standards (STAS)

Flat Flanges According to STAS 8012-84 NP 6

Flat Flanges According to STAS 8013-84 NP 10

Flat Flanges According to STAS 8014-84 NP 16

Flat Flanges According to STAS 8015-84 NP 25

Blind Flanges According to Romanian Standards (STAS)

Blind Flanges According to STAS 7451- 88 NP 6

Blind Flanges According to STAS 7451- 88 NP 10

Blind Flanges According to STAS 7451- 88 NP 16

Blind Flanges According to STAS 7451- 88 NP 25

Manufacturing process of STAS flange

STAS flanges can be produced by forging, casting, cutting or rolling. We mainly produce flanges by forging, cutting and rolling processes.

Manufacturing process of STAS forged flange

The forging process usually includes the following processes, i.e. selection of high quality billets, heating, forming and cooling.

• Raw material inspection – The key raw material used to produce flanges is billet or hot rolled bar stock. All raw materials purchased are supplied with test reports in accordance with British Standards with full traceability. This is the first mandatory step in the flange production process to ensure good quality. The raw materials are retested in-house to ensure chemical composition, mechanical properties and metallographic analysis.
• Cutting of raw materials – Correct and strict control of cutting sizes and proportions ensures full cost control.
• Heating – This is a very important step for the quality of the flanges. It is necessary to keep detailed records of heating temperatures to avoid overheating. Overheating can damage the structure of the metal and the mechanical properties of the raw material.
• Forging – The forging process is divided into free forging and die forging. The forging time and strength of flanges vary for different pressure classes.
• Heat treatment-The purpose of heat treatment is to eliminate the stress inside the flange and make the density more uniform. Careful recording of heat treatment temperature and cooling time is the key.
• Inspection of forging blanks – After the heat treatment process, select batch samples are tested again for chemical composition and mechanical properties to ensure that all items pass.
• Machining of forging blanks – During machining, inspection is performed along with machining to ensure that each part of the flange is qualified. Machining is performed on CNC and/or lathes.
• Finished Product Inspection – The finished product will be inspected 100% prior to delivery to ensure that the goods meet STAS, ASME, EN or customer standards.
• Documented Documentation – The entire production process and quality checks at different levels are documented according to STAS compliant standard operating procedures. This is the guarantee of good quality.
• Test certificates: As we are an STAS and PED certified manufacturer, we can issue test certificates for all goods upon delivery and inspection in accordance with British Standards.
• Packaging: All forgings and flanges are packed in wooden boxes or crates or pallets to ensure safe movement of the goods.

Manufacturing process of STAS plate cutting flange

The process here is relatively simple, and the key raw material is hot rolled plate. The process is mainly used to produce lower thickness sliding plate flanges and blind flanges. All plates purchased are accompanied by a test certificate to STAS Standards.
The circles are cut from the plates.
No heat treatment is involved in the flange manufacturing process.
Drilling and machining is carried out on the circles to obtain the required dimensions.
The goods are visually inspected and marked in accordance with the relevant standards.

Marking of STAS Flanges

Regarding the marking of STAS flanges, the standard specifies that the following information should be included on each flange:

• 1. Manufacturer’s name or trademark;
• 2. Flange size and pressure rating (PN);
• 3. Material designation (e.g., P250GH for carbon steel, X5CrNi18-10 for stainless steel);
• 4. Heat number or identification code for traceability;
• 5. STAS standard designation.

These markings can be stamped or cast onto the surface of the flange or provided on a separate tag attached to the flange.
It is essential to follow the standard requirements for marking of STAS flanges to ensure the proper identification and traceability of the flanges during installation and maintenance.

Packing of STAS Flanges

To package STAS flanges, you can follow these steps:

• 1. Gather necessary packaging materials: You will need sturdy cardboard boxes, bubble wrap, packing peanuts, and packing tape.
• 2. Wrap each flange in bubble wrap: Start by wrapping each STAS flange in bubble wrap. Be sure to wrap it tightly, so it is well-protected.
• 3. Place the wrapped flanges in the cardboard box: After wrapping the flanges, place them in the cardboard box. Make sure to fill any gaps with packing peanuts to prevent the flanges from moving around during shipping.
• 4. Seal the box with packing tape: Once the flanges are inside the box, seal it securely with packing tape. Be sure to reinforce the edges and seams of the box with additional tape.
• 5. Label the box: Finally, label the box clearly with the destination address, return address, and any other necessary information.
• 6. Arrange for shipping: Arrange for the box to be shipped through a reliable carrier, and make sure to track the shipment to ensure it reaches its destination safely.

Following these steps ensuresadequatelytrack the shipment to c that your STAS flanges are properly packaged and protected during shipping.

Inspection and measurement of STAS Flanges

Flanges are a crucial component in piping systems, connecting pipes and ensuring a leak-free flow of fluids. STAS flanges, in particular, are known for their superior quality and durability, making them a popular choice among industries. However, ensuring the proper inspection and measurement of STAS flanges is essential to ensure optimal performance and safety. We will discuss the material, dimensions, surface finish, bolt hole alignment, bolt hole size, bolt hole thread, and gasket surface of STAS flanges.
Material
STAS flanges are commonly made from high-grade materials such as carbon steel, stainless steel, and alloy steel. These materials are known for their durability and corrosion resistance, ensuring the flanges can withstand harsh environments.
Dimension
The dimension of STAS flanges is crucial to ensure a proper fit with pipes and other components in the system. The flanges typically come in a range of sizes, from DN15 to DN400, and conform to standard dimensions such as DIN and ANSI.
Surface Finish
The surface finish of STAS flanges is another critical factor that affects their performance. The flanges should have a smooth and even surface finish to prevent leakage and ensure a tight seal between the flanges and gasket. Common surface finishes include polished, galvanized, and sandblasted.
Bolt Hole Alignment
The bolt hole alignment of STAS flanges must be precise to ensure the proper alignment of bolts and the secure connection of the flanges. Proper bolt hole alignment prevents leaks and ensures the stability of the piping system.
Bolt Hole Size
The bolt hole size of STAS flanges is typically between 1/2 inch to 2 inches, depending on the flange size. The bolt holes must be properly sized to accommodate the bolts used in the system.
Bolt Hole Thread
The bolt hole thread of STAS flanges is typically coarse-threaded to ensure a secure and tight fit with the bolts used in the system. The thread should be evenly cut and free of burrs or other imperfections that can affect the connection between the flanges and bolts.
Gasket Surface
The gasket surface of STAS flanges must be smooth and even to ensure a tight seal between the flanges and the gasket. Proper gasket surface finish prevents leaks and ensures the stability of the piping system.
Ensuring proper inspection and measurement of STAS flanges is crucial for optimal performance and safety. It is essential to consider factors such as material, dimension, surface finish, bolt hole alignment, bolt hole size, bolt hole thread, and gasket surface when inspecting and measuring STAS flanges. By following these guidelines, you can ensure the flanges function correctly, prevent leaks, and maintain the integrity of your piping system.

Application of STAS Flanges

STAS Flanges are known to deliver exceptional performance and are generally developed for meeting the demands. These STAS Flange is use in various industries like:

• Stainless Steel STAS Flange uses in Oil and Gas Pipeline;
• STAS Flange uses in Chemical Industry;
• Alloy Steel STAS Flange uses in Plumbing;
• Flat Faced STAS Flange uses in Heating;
• STAS Flange uses in Water Supply Systems;
• STAS Flange uses in Power Plant;
• STAS Flange uses in Paper & Pulp Industry;
• STAS Flange uses in General Purpose Applications;
• Steel STAS Flange uses in Fabrication Industry;
• STAS Flange uses in Food Processing Industry;
• STAS Flange uses in Structural Pipe.

How to purchase the correct STAS flanges?

If you’re in the market for STAS flanges, it’s important to understand the various factors that go into selecting the correct flange for your application. With so many options available, it can be overwhelming to know where to start. We’ll discuss the key considerations for purchasing the correct STAS flanges, including their size, type, material, pressure rating, connection type, and standard.
Size of STAS Flange:
The size of a flange is determined by the nominal size of the pipe it will be connected to. STAS flanges are available in a range of sizes, from DN10 to DN400. It’s crucial to choose a flange that is the same size as your piping system to ensure a proper and secure fit.
Type of STAS Flange:
STAS flanges are available in several different types, including weld neck, blind and so on. The type of flange you choose will depend on the specific requirements of your piping system. For example, slip-on flanges are often used for low-pressure applications, while weld neck flanges are better suited for high-pressure environments.
Material of STAS Flange:
The material of the flange is another critical consideration. STAS flanges are commonly made from carbon steel, stainless steel, or alloy steel. The material you choose will depend on the requirements of your application, including the temperature, pressure, and corrosive nature of the fluid being transported.
Pressure Rating of STAS Flange:
The pressure rating of a flange is the maximum pressure it can withstand without failure. STAS flanges are available with pressure ratings ranging from PN6 to PN40. It’s crucial to choose a flange with a pressure rating that matches the requirements of your piping system.
Connection Type of STAS Flange:
The connection type of a flange refers to the method used to connect the flange to the piping system. The most common types of connections are raised face, flat face, and ring type joint. The connection type you choose will depend on the specific requirements of your piping system.
Standard of STAS Flange:
Finally, the standard of a flange refers to the specific set of specifications it adheres to. STAS flanges are designed to meet the requirements of the French National Standard. It’s essential to choose a flange that meets the relevant standards for your application to ensure proper performance and compliance.
When purchasing STAS flanges, it’s crucial to consider several key factors, including the size, type, material, pressure rating, connection type, and standard. By carefully evaluating these factors and selecting the right flange for your application, you can ensure optimal performance and safety in your piping system.

How to select STAS flanges manufacturer?

When it comes to selecting a reliable STAS flanges manufacturer, there are several factors that you need to consider. After all, the quality of your flanges can significantly impact your machinery’s performance and your operations’ safety. We will discuss some critical steps to help you find the proper manufacturer for your needs.
Determine your needs
Before you search for a flanges manufacturer, you must know what you need. This means understanding the specifications, dimensions, and other requirements of the flanges you need. Take the time to analyze your project requirements and identify the type of flanges required. This will make finding a manufacturer that can meet your needs more leisurely.
Reputation
Look for reviews, ratings, and testimonials from previous customers. Check if the manufacturer has any industry certifications, awards, or affiliations.
Experience
When it comes to STAS flanges, experience matters, you want to work with a manufacturer with a proven track record of producing high-quality flanges. Look for a manufacturer with a long history in the industry and a solid reputation for delivering reliable products.
Production capacity
Ensure the manufacturer has the production capacity to meet your project’s needs. Check their lead time, production schedules, and inventory levels.
Customization
Not all projects require standard flanges. If you need customized flanges, you should look for a manufacturer that can provide tailored solutions to meet your specific requirements. Make sure that the chosen manufacturer can produce customized flanges that meet your project’s unique specifications.
Cost
Of course, the cost is a critical factor in any purchasing decision. When selecting a flanges manufacturer, it’s essential to consider the cost of their products and services. However, it’s important to remember that sometimes the cheapest option is the best. Look for a manufacturer that offers competitive pricing while providing high-quality products and services.
Location
The location of the manufacturer can also impact your decision. Working with a manufacturer close to your project site can help reduce transportation costs and lead times. However, if the manufacturer is located in a region with lower labor and production costs, they can offer more competitive pricing.
Research manufacturers
Once you’ve identified your needs and requirements, it’s time to start researching manufacturers. You can start by searching online for manufacturers that produce STAS flanges. Look for manufacturers that have a website, social media presence, and positive reviews.
Request quotes
After you’ve found some promising manufacturers, it’s time to request quotes. Most manufacturers will provide a free quotation based on your project requirements. Ensure you provide as much detail as possible to get an accurate quote.
Review the quotes
Once you’ve received the quotes, take the time to review them carefully. Look at the pricing, delivery times, and any other relevant details. Feel free to ask questions or request additional information if you need it.
Consider other factors
When selecting a flanges manufacturer, there are many other factors to consider. For example, you may want to look at the manufacturer’s quality control processes and customer service. Make sure you choose a manufacturer that meets your specific needs and requirements.

• Evaluate the manufacturer’s quality control processes: Quality control is crucial in producing STAS flanges. Look for a manufacturer with robust quality control processes to ensure that their products meet the required standards.
• Consider the manufacturer’s customer service: A reliable manufacturer should provide excellent customer service. Look for a responsive, transparent manufacturer, and willing to work with you to meet your project’s needs.
• Check the manufacturer’s pricing: Pricing is essential when selecting a manufacturer. However, don’t base your decision solely on the price. Consider the manufacturer’s overall value proposition, including its product quality, service, and support.

Following these steps, you can identify a reliable STAS flanges manufacturer that can meet your project’s needs and deliver high-quality products and services.

Why Choose Guanxin to Be Your STAS Flange Supplier?

In today’s competitive marketplace, choosing a STAS flange supplier that can offer high-quality products, competitive pricing, and excellent customer service is more important than ever. That’s why Guanxin is the perfect choice for your STAS flange needs. One of the key benefits of choosing Guanxin is the quality of its products. All of Guanxin’s products are manufactured using state-of-the-art equipment and the highest-quality materials, ensuring that you receive a reliable and long-lasting product. In addition, Guanxin’s quality control measures are among the most stringent in the industry, so you can trust that the products you receive will meet or exceed your expectations.
Another benefit of choosing Guanxin is its competitive pricing. Unlike many STAS flange suppliers, Guanxin is committed to providing its customers with the best possible pricing without sacrificing quality or service. This means you can trust that you are getting the best potential value for your money when you choose Guanxin.
Of course, even the best quality products and the most competitive pricing are only enough with excellent customer service. That’s why Guanxin is committed to providing its customers with the highest customer service possible. Whether you have a question about a product or need assistance with an order, Guanxin’s knowledgeable and friendly customer service team is there to help you every step of the way.
Despite these benefits, we understand that some potential customers might have concerns about choosing Guanxin as their STAS flange supplier. For instance, some might be concerned that Guanxin’s products are more expensive than other suppliers. However, we encourage you to compare Guanxin’s pricing with other suppliers and see that we offer the best possible value for your money. Likewise, some might be concerned that Guanxin’s quality control measures might lead to longer lead times or delays in shipping. However, we are committed to getting your products to you as quickly as possible while ensuring the highest quality. In conclusion, Guanxin is the clear choice for anyone needing high-quality STAS flanges at a competitive price, with excellent customer service to back it up. We encourage you to contact us today to learn more about how we can help meet your STAS flange needs. As a special offer for new customers, use the code JIHUA10 to receive 10% off your first order. Thank you for considering Guanxin as your STAS flange supplier.

Export Country For STAS Flanges