Marine News

  What Is An Integral Flange? The integral flange (IF)  is a connection method of a flange, which belongs to a steel pipe  flange  with neck butt welding. It is made of a single piece of material and forms a sealed joint at the junction with or. Compared with the traditional split flange, the integral flange has higher strength and reliability. The material of the whole flange is carbon steel, stainless steel, alloy steel, etc., which is mostly used in pipelines with high pressure. The production process is generally casting, and the sealing surface form can be a convex surface (RF), a convex and concave surface (MFM) or a mortise and groove surface (TG) according to the different working conditions. The integral flange has the following characteristics: High strength:  Because the integral flange is made of a single piece of material, it has high strength and stiffness, and can withstand greater pressure and impact loads. Good sealing:  The whole flange is...

  The difference between loose sleeve flange and welded flange Butt welded ring loose sleeve flange  and  welded flange  are common  flanges , they have some differences in structure, application range and characteristics. Structure:  The connection modes of the loose sleeve flange and the welded flange are different. The flat welding flange is the welding of two pipes, pipe fittings or equipment to two parallel and vertical flanges with the pipe axis, and then connected by bolts. The loose sleeve flange is the two pipes, pipe fittings or equipment are welded to two flanges with flanges or steel rings, and then connected by bolts. The role of the flanging or steel ring is to provide the sealing surface, and the role of the flange is to press them. Application:  Flat welded flanges are mainly used for the connection of pipelines, especially in pipelines with low pressure and vibration. The loose sleeve flange is mainly used for the connection of steel, ...

  What Is Flat Welded Ring Loose Sleeve Flange? The flat welded ring loose sleeve flange  is a flange joint formed by combining the flat welded flange and the ring loose sleeve flange. Flat welded ring loose sleeve flange is widely used in some general low pressure, low temperature occasions, such as water supply, gas and other pipeline system. ​ Flat welded ring loose sleeve flange  is suitable for pressure ≤2.5MPa, temperature ≤120℃ occasions, more suitable for some general low pressure, low temperature occasions. The advantages are simple installation, high popularity and low cost, and the disadvantages are small scope of application, poor corrosion resistance and wear resistance. The characteristics of flat welded ring loose sleeve flange are as follows: Simple structure: its structure is relatively simple, consisting of a sleeve and a ring loose nut, the flange is first set on the pipe during installation, and then the gasket and washer are added to the flange, and f...

  What Is Butt Welded Ring Loose Sleeve Flange? ​ Butt welded ring loose sleeve flange  (PJ/SE) is a flange whose structure is similar to that of flat welded flange, but there are some differences. The loose sleeve flange  of the butt welding ring is a movable flange, which is generally matched on the water supply and drainage accessories. When the manufacturer leaves the factory, each end of the expansion joint has a flange, which is directly connected with the pipe and equipment in the project with bolts. Specifically, the advantages of butt welded ring loose sleeve flange include: Cost saving: Because of its simple structure, it is relatively easy to manufacture and can save manufacturing costs. Easy to repair: Its unique construction makes it easier to repair and replace. Strong applicability: The welding ring loose sleeve flange has a wide range of application and can be used in a variety of different pipeline systems. However, compared with the flat welded flange, t...

  What Is A Socket Weld Flange? Socket welding flange  refers to the pipe end inserted into the flange ring ladder, welded in the pipe end and the outer  flange . It comes in two types with and without a neck. The socket welding flange with neck has good rigidity, small welding deformation and good sealing property, and can be used in situations where the pressure is 1.0~10.0MPa. The Type B flange for the container is also a socket welding flange, which is used for occasions with high sealing requirements. Socket welding flange  design, can be checked according to the integral flange. Socket welded flanges are usually used in pipes with PN≤10.0 MPa and DN≤50. Advantages: Simple structure: The structure of the socket welding flange is relatively simple, consisting of the socket welding flange ring and pipe, and does not require welding, so the installation is convenient and the installation time can be shortened. Strong applicability: socket welding flange is suitable...

  What Is A Threaded Flange? ​ The threaded flange  is a kind of  non-welded flange . The inner hole of the flange is machined into pipe thread and connected with the pipe with thread. The flange does not need to be welded, has the characteristics of easy installation and maintenance, and can be applied to some pipelines that are not allowed to be welded on site. However, due to its large flange thickness, high cost, and not suitable for high-pressure situations, it has certain limitations. Advantages: Easy installation: Because there is no need to weld, the installation of threaded flange is relatively convenient, which can avoid the trouble caused by welding and shorten the installation time. Strong applicability: suitable for pipe connections of various pipe diameters and materials, especially for occasions where welding is not allowed. Cost savings: Compared with butt welded flanges, the production cost of threaded flanges is lower, which can reduce the cost of the en...

  What Is A Neck Butt Weld Flange? Neck butt welded flange  is a butt welded type flange with a conical neck that is butt welded to a barrel or pipe. Due to the transition structure of conical neck and butt welded connection, the strength and stiffness of the flange are enhanced, and the sealing performance is better than that of the flat welded flange. Neck butt welded flanges usually have a neck design with a high hub, which is designed to transfer the pressure of the pipe, thereby reducing the high stress concentration of the flange base. Neck butt welding flange is an important part of connecting pipelines, its advantages and disadvantages are as follows: Advantages: Compact structure, occupy less space, can reduce the size and weight of the equipment, reduce the cost. With high stiffness and strength, it can withstand high pressure, high temperature or vibration and other loads. Suitable for high temperature, high pressure or high sealing requirements, such as petroleum, ...

  What Is A Neck Flat Welded Flange? The  neck flat welded flange  is a flange that extends the steel pipe, pipe fittings, etc. into the flange and connects with the equipment or pipe through the fillet weld. ​ Neck Flat welded flanges  with neck are characterized by a raised neck and are usually used to support pipes to prevent deformation and leakage. This raised neck can be cut off during welding. Neck flat welded flanges are usually used for low - and medium-pressure pipe connections, and their dimensions and specifications are the same as the monolithic flange. In addition, flat welded flange with neck has better sealing performance and higher stiffness, can withstand greater pressure and vibration, so it is also widely used in gas valves, natural gas pipelines and other occasions. Neck Flat welded flanges with neck are widely used in various ships, especially in situations where liquid or gas transmission is required. For example, oil tankers, chemical tan...

  What Is Flat Welded Flange? The flat welded flange  is a flange connected with a container or pipeline by a fillet weld, which belongs to any type of flange. According to the integrity of the connection between the flange ring and the straight cylinder section, the design is checked according to the integral or loose flange, with and without neck. Compared with the  neck butt welded flange , the flat welded flange has simple structure and less material, but the stiffness and sealing property are not as good as that of the neck butt welded flange. Flat welded flanges  are widely used in the connection of medium and low pressure vessels and pipelines, and the advantages of flat welded flanges are easier to align in the welding assembly of flat welded flanges, and the price is cheaper, so it has been widely used. As one of the most used flanges for ships, flat-welded flanges are characterized by inserting pipes into the inner ring of the flanges and are welded, mainly...

  How Many Are The Classification Of Marine Flanges? Marine flange  is a part used to connect various pipes and equipment on a ship, usually used to transport liquids, gases or powdery substances. ​ There are mainly the following categories of Marine flanges: Flat welded flange:  It is a flange that inserts the pipe into the inner ring of the flange, which is mainly suitable for normal temperature pipelines with pressure less than 2.5MPa, and is the most used flange in ships. Butt welded flange:  also known as high neck flange, it refers to the flange with a neck that has a round tube transition and is welded with the pipe. Mainly used in compressed air piping, carbon dioxide piping Loose sleeve flange: commonly known as a movable flange, is a flange connection method, suitable for copper-nickel alloy tubes and expansion joints. Hydraulic flange:  mainly used to withstand high pressure or high mechanical stress occasions. Long welded neck flange:  Its struc...

  What is a Marine flange? A  Marine flange  is a part used to connect various pipes and equipment on a ship, usually used to transport liquids, gases or powdery substances. ​ It is an integral part of ship construction and repair, with the following characteristics: Marine flanges  have good corrosion resistance and weather resistance, and can be used in the Marine environment for a long time without corrosion or damage. It has high mechanical strength and stability, and can withstand the vibration and shock of the ship during navigation. The connection methods of Marine flanges are various, and different connection methods can be selected according to needs, such as welding, bolt connection, etc. It has good sealing performance, can ensure the tightness between the pipeline and the equipment, to prevent liquid and gas leakage. Marine flange  is an indispensable part of ship manufacturing and maintenance, it can ensure the normal operation of ship pipelines and...