China Good quality ANSI/DIN Standard Carbon Steel Wn/So/Sw/Threaded/Plate/Blind Flange with Great quality

Product Description

Product Description

ANSI/DIN Standard Carbon Steel Wn/So/Sw/Threaded/Plate/Blind Flange

1. What Is A Flange?
The flange is a part that connects between shaft and shaft and is used for connection between pipe ends; it is also useful for flanges on the inlet and outlet of equipment for connection between 2 equipment, such as reducer flange. The flange connection or flange joint refers to a detachable connection in which flanges, gaskets, and bolts are connected to each other as a set of combined sealing structures. 

2. What Is A Pipe Flange?
Pipe flange refers to the flange used for piping in the pipeline installation and refers to the inlet and outlet flanges of the equipment when used on the equipment. There are holes on the flanges, and bolts make the 2 flanges tightly connected. The flanges are sealed with gaskets. The flange is divided into the threaded flange, welding flange, and clamp flange. Flanges are used in pairs, threaded flanges are used for low-pressure small diameters pipes, and welding flanges are used for high-pressure and low-pressure large diameters pipes. A gasket is added between the 2 flanges and then tightened with bolts. The thickness of flanges and the diameter and number of connecting bolts are different for different pressures.

3. What Is A Carbon Steel Flange?
Carbon steel flange, that is, the flange plate or the end flange connection piece whose body is made of carbon steel. The flanges containing carbon steel are called carbon steel flanges. Common materials are cast carbon steel grades WCB, forgings A105, or Q235B, A3, 10#, #20 steel, 16 manganese, 45 steel, Q345B, etc.

Usually in order to prevent rusty flange surface with electroplating layer (yellow zinc, white zinc, etc.), or brush anti-rust oil and spray anti-rust paint treatment.

Product Parameters

Carbon steel flange generally refers to the flange forged from carbon steel designed to connect sections of pipe or join pipe to a pressure vessel, valve, pump, or any other equipment. In the case of carbon steel flanges, A105 and RST37.2 are the most common grades available.

Product Carbon Steel Flange
Type Weld Neck Flange, Socket Weld Flange, Slip On Flange, Blind Flange, Thread Flange, Lap Joint Flange, Plate Flange, Reducing Flange, etc.
Size 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″, 3 1/2″, 4″, 5″, 6″, 8″, 10″, 12″, 14″, 16″, 18″, 20″, 22″, 24″, 26″, 28″, 30″, 32″, 34″, 36″, 38″, 40″, 42″, 44″, 46″, 48″
DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN90, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN550, DN600, DN650, DN700, DN750, DN800, DN850, DN900, DN950, DN1000, DN1050, DN1100, DN1150, DN1200
Material Carbon Steel: A105/RST37.2/C22.8/Q235, etc.
Stainless Steel: 304/304L,316/316L,321,ect.
Pressure Class 150;Class 300;Class 600;Class 900;Class 1500;Class 2500
Wall Thickness Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS.
Standard ANSI/ASME B16.5, ANSI/ASME B16.47, DIN, JIS, GOST, UNI, etc.
Surface Treatment  Oiled or Painting or Sandblast or Galvanized
Application Because the flange has good comprehensive performance, it is widely used in basic projects such as chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire fighting, electric power, aerospace, shipbuilding, and so on.
Service OEM or ODM Service Available
Packing Wooden case, pallet or as customers’ requirement
Delivery  Items FOB(30% down payment in advance, the balance before shipment)
CIF or CRF(30% in advance, the balance against with the copy of B/L)
Delivery Time Within 15-45 days after receipt of advance payment
Advantage 1. More than 10 years of flange manufacturing experience.
2. Near ZheJiang Port and ZheJiang Airport.
3. We provide: We have high-quality processing equipment. We promise on-time, stable quality, just price, client confidentiality.
4. With samples and order: We can offer dimension reports, material certification.
Inspection Optical Spectrometer
X-ray Detector
QR-5 Fully Automatic Computer Carbon Sulfur Analyzer Measurement
Tensile Test
Finished Product NDT UT(Digital UItrasonic Flaw Detector)
Metallographic Analysis
Imaging Studies
Magnetic Particle Inspection

Detailed Photos

Company Profile

ZheJiang Fusion Fittings Manufacture Co., Ltd. is an excellent manufacturer, factory, supplier that mainly produces pipe fittings, flanges, supports, and hangers, as well as steel sleeve steel steam insulation pipelines, polyurethane prefabricated direct buried insulation pipelines and acts as an agent for the sales of steel pipes for many large enterprises such as Tiangang, HangZhou Steel, HangZhou Iron and Steel, and HangZhou Iron and Steel. The company is located in Zhenggang Development Zone, YHangZhou County, ZheJiang Province, China. It mainly provides high, medium, and low-pressure steel pipes, pipe fittings, and product sales and services for electric power, petroleum, chemical, construction, water conservancy, and other industries. 

The company was founded in 2003, and the registered capital is 103,780,000. The company’s leading products are thermal insulation pipe, elbow, tee, reducer, flange, etc. The Product material can be divided into carbon steel, alloy steel, stainless steel series. It also sells carbon steel pipes, seamless steel tubes, spiral steel tubes, alloy steel tubes, stainless steel tubes, and other products.

In recent years, our company has continuously deepened its internal reform of the enterprise, innovating in the reform and developing in the innovation, and gradually formed a set of adaptive markets, with a strong competitive management mechanism. It realized the synchronization and integration with domestic and international market networks.

Other Products

Main Products

Packaging & Shipping


Q1: Why choose Fusion? 
A: Our company was established in 2003, covers an area of 200,000 square meters, with a building area of 120,000 square meters, a registered capital of 120 million, and an annual output value of more than 1 billion.
The company has 500 employees, including 25 senior titles and 50 intermediate titles.

Q2: What can we expect from Fusion? 
A: Professional negotiation, reasonable price, and good after-sale service.

Q3: Can you do customized design and size? 
A: Yes, OEM is available.

Q4: Can I have some samples?
A: Of course, samples are free.

Q5: When can we get samples and goods? 
A: If we have stock, the samples will be sent soon, making new will take about 5 days. 

Q6: How can you ensure the quality of products?
A: We have a very strict quality control system, in our factory, we have 5 quality control inspectors and each of them has many years of working experience.

Q7: Can I order a small quantity first?
A: Yes, you are welcome to try it.

What Are Screw Shaft Threads?

A screw shaft is a threaded part used to fasten other components. The threads on a screw shaft are often described by their Coefficient of Friction, which describes how much friction is present between the mating surfaces. This article discusses these characteristics as well as the Material and Helix angle. You’ll have a better understanding of your screw shaft’s threads after reading this article. Here are some examples. Once you understand these details, you’ll be able to select the best screw nut for your needs.

Coefficient of friction between the mating surfaces of a nut and a screw shaft

There are 2 types of friction coefficients. Dynamic friction and static friction. The latter refers to the amount of friction a nut has to resist an opposing motion. In addition to the material strength, a higher coefficient of friction can cause stick-slip. This can lead to intermittent running behavior and loud squeaking. Stick-slip may lead to a malfunctioning plain bearing. Rough shafts can be used to improve this condition.
The 2 types of friction coefficients are related to the applied force. When applying force, the applied force must equal the nut’s pitch diameter. When the screw shaft is tightened, the force may be removed. In the case of a loosening clamp, the applied force is smaller than the bolt’s pitch diameter. Therefore, the higher the property class of the bolt, the lower the coefficient of friction.
In most cases, the screwface coefficient of friction is lower than the nut face. This is because of zinc plating on the joint surface. Moreover, power screws are commonly used in the aerospace industry. Whether or not they are power screws, they are typically made of carbon steel, alloy steel, or stainless steel. They are often used in conjunction with bronze or plastic nuts, which are preferred in higher-duty applications. These screws often require no holding brakes and are extremely easy to use in many applications.
The coefficient of friction between the mating surfaces of t-screws is highly dependent on the material of the screw and the nut. For example, screws with internal lubricated plastic nuts use bearing-grade bronze nuts. These nuts are usually used on carbon steel screws, but can be used with stainless steel screws. In addition to this, they are easy to clean.

Helix angle

In most applications, the helix angle of a screw shaft is an important factor for torque calculation. There are 2 types of helix angle: right and left hand. The right hand screw is usually smaller than the left hand one. The left hand screw is larger than the right hand screw. However, there are some exceptions to the rule. A left hand screw may have a greater helix angle than a right hand screw.
A screw’s helix angle is the angle formed by the helix and the axial line. Although the helix angle is not usually changed, it can have a significant effect on the processing of the screw and the amount of material conveyed. These changes are more common in 2 stage and special mixing screws, and metering screws. These measurements are crucial for determining the helix angle. In most cases, the lead angle is the correct angle when the screw shaft has the right helix angle.
High helix screws have large leads, sometimes up to 6 times the screw diameter. These screws reduce the screw diameter, mass, and inertia, allowing for higher speed and precision. High helix screws are also low-rotation, so they minimize vibrations and audible noises. But the right helix angle is important in any application. You must carefully choose the right type of screw for the job at hand.
If you choose a screw gear that has a helix angle other than parallel, you should select a thrust bearing with a correspondingly large center distance. In the case of a screw gear, a 45-degree helix angle is most common. A helix angle greater than zero degrees is also acceptable. Mixing up helix angles is beneficial because it allows for a variety of center distances and unique applications.

Thread angle

The thread angle of a screw shaft is measured from the base of the head of the screw to the top of the screw’s thread. In America, the standard screw thread angle is 60 degrees. The standard thread angle was not widely adopted until the early twentieth century. A committee was established by the Franklin Institute in 1864 to study screw threads. The committee recommended the Sellers thread, which was modified into the United States Standard Thread. The standardized thread was adopted by the United States Navy in 1868 and was recommended for construction by the Master Car Builders’ Association in 1871.
Generally speaking, the major diameter of a screw’s threads is the outside diameter. The major diameter of a nut is not directly measured, but can be determined with go/no-go gauges. It is necessary to understand the major and minor diameters in relation to each other in order to determine a screw’s thread angle. Once this is known, the next step is to determine how much of a pitch is necessary to ensure a screw’s proper function.
Helix angle and thread angle are 2 different types of angles that affect screw efficiency. For a lead screw, the helix angle is the angle between the helix of the thread and the line perpendicular to the axis of rotation. A lead screw has a greater helix angle than a helical one, but has higher frictional losses. A high-quality lead screw requires a higher torque to rotate. Thread angle and lead angle are complementary angles, but each screw has its own specific advantages.
Screw pitch and TPI have little to do with tolerances, craftsmanship, quality, or cost, but rather the size of a screw’s thread relative to its diameter. Compared to a standard screw, the fine and coarse threads are easier to tighten. The coarser thread is deeper, which results in lower torques. If a screw fails because of torsional shear, it is likely to be a result of a small minor diameter.


Screws have a variety of different sizes, shapes, and materials. They are typically machined on CNC machines and lathes. Each type is used for different purposes. The size and material of a screw shaft are influenced by how it will be used. The following sections give an overview of the main types of screw shafts. Each 1 is designed to perform a specific function. If you have questions about a specific type, contact your local machine shop.
Lead screws are cheaper than ball screws and are used in light-duty, intermittent applications. Lead screws, however, have poor efficiency and are not recommended for continuous power transmission. But, they are effective in vertical applications and are more compact. Lead screws are typically used as a kinematic pair with a ball screw. Some types of lead screws also have self-locking properties. Because they have a low coefficient of friction, they have a compact design and very few parts.
Screws are made of a variety of metals and alloys. Steel is an economical and durable material, but there are also alloy steel and stainless steel types. Bronze nuts are the most common and are often used in higher-duty applications. Plastic nuts provide low-friction, which helps reduce the drive torques. Stainless steel screws are also used in high-performance applications, and may be made of titanium. The materials used to create screw shafts vary, but they all have their specific functions.
Screws are used in a wide range of applications, from industrial and consumer products to transportation equipment. They are used in many different industries, and the materials they’re made of can determine their life. The life of a screw depends on the load that it bears, the design of its internal structure, lubrication, and machining processes. When choosing screw assemblies, look for a screw made from the highest quality steels possible. Usually, the materials are very clean, so they’re a great choice for a screw. However, the presence of imperfections may cause a normal fatigue failure.

Self-locking features

Screws are known to be self-locking by nature. The mechanism for this feature is based on several factors, such as the pitch angle of the threads, material pairing, lubrication, and heating. This feature is only possible if the shaft is subjected to conditions that are not likely to cause the threads to loosen on their own. The self-locking ability of a screw depends on several factors, including the pitch angle of the thread flank and the coefficient of sliding friction between the 2 materials.
One of the most common uses of screws is in a screw top container lid, corkscrew, threaded pipe joint, vise, C-clamp, and screw jack. Other applications of screw shafts include transferring power, but these are often intermittent and low-power operations. Screws are also used to move material in Archimedes’ screw, auger earth drill, screw conveyor, and micrometer.
A common self-locking feature for a screw is the presence of a lead screw. A screw with a low PV value is safe to operate, but a screw with high PV will need a lower rotation speed. Another example is a self-locking screw that does not require lubrication. The PV value is also dependent on the material of the screw’s construction, as well as its lubrication conditions. Finally, a screw’s end fixity – the way the screw is supported – affects the performance and efficiency of a screw.
Lead screws are less expensive and easier to manufacture. They are a good choice for light-weight and intermittent applications. These screws also have self-locking capabilities. They can be self-tightened and require less torque for driving than other types. The advantage of lead screws is their small size and minimal number of parts. They are highly efficient in vertical and intermittent applications. They are not as accurate as lead screws and often have backlash, which is caused by insufficient threads.

China Good quality ANSI/DIN Standard Carbon Steel Wn/So/Sw/Threaded/Plate/Blind Flange   with Great qualityChina Good quality ANSI/DIN Standard Carbon Steel Wn/So/Sw/Threaded/Plate/Blind Flange   with Great quality