● What Are Malleable Iron Pipe Fittings?
Malleable iron pipe fittings are pipe fittings made from malleable cast iron, a type of ductile cast iron. These fittings are commonly used in plumbing, heating, and fire protection systems due to their strength, durability, and corrosion resistance. Malleable iron pipe fittings are manufactured through a process called malleability. The process involves heating iron to high temperatures and slowly cooling it to produce a material with a fine-grained structure and improved ductility.
●What Products Do Malleable Iron Pipe Fittings Include?
1.Elbow: Elbow is a pipe fitting that changes the direction of the pipe. Elbows are available in a variety of angles, including 90 degrees, 45 degrees and 22.5 degrees.
2.Tee: A tee is a pipe fitting with three openings. A tee is used to join three pipes together, often to create branch pipes from a main pipe.
3.Socket: A socket is a pipe fitting with an internally threaded end. Sockets are used to connect pipe to externally threaded fittings, such as stubs or plugs.
4.Nipple: A nipple is a short piece of pipe that has male threads on both ends. Nipples are used to connect two female threaded fittings, such as sockets or unions.
5.Plug: A plug is a pipe fitting with an externally threaded end that is used to close the end of a pipe.
6.Union: A union is a pipe fitting consisting of two internally threaded ends and a nut. Unions are used to join two pipes together for easy disassembly.
7.Bushing: A bushing is a mechanical bearing used to reduce friction between two moving parts. The bushing is usually cylindrical in shape and is inserted into a hole in one of the parts. The other part then rotates or slides on the bushing.
8.Reducer: A reducer is a pipe fitting that reduces the size of a pipe. Reducers are available in a variety of sizes and can be used to join pipes of different diameters.
9.Reducing elbow: Reducing elbow is a pipe fitting that changes the direction of the pipe and reduces the size of the pipe. Reducing elbows are available in a variety of angles and sizes.
10.Reducing Tee: A reducing tee is a pipe fitting that has three openings and reduces the size of the pipe. Reducing tees are used to join three pipes together, often to create branch pipes from the main pipe and to reduce the size of the branch pipe.
11.Flange: A flange is a pipe fitting used to connect two pipes together. Flanges are usually bolted together and can be used to join pipes of different diameters or materials.
12.Union elbow: Union elbow is a pipe fitting that combines the characteristics of elbow and union. The connecting elbow is easy to remove and available in a variety of angles.
13.Cross: A cross is a pipe fitting with four openings. A cross is used to join four pipes together, often to create branch lines from a main line.
14.Bend: Bend is a pipe fitting that changes the direction of the pipe. Bending is usually achieved by bending the pipe, but it can also be achieved using fittings.
15.Short bend: A short bend is a pipe fitting that changes the direction of the pipe and has a shorter radius than a standard bend.
16.Flat Seat union: A flat seat union is a pipe fitting consisting of two internally threaded ends and a flat seat. Flat seat union are used to join two pipes together and are easy to remove.
17.Taper seat union: The taper seat union is a pipe fitting composed of two internal thread ends and a tapered seat. Taper unions are used to connect two pipes together and are easily disassembled.
18.Brass Seat Taper union: A brass seat taper union is a taper seat union with a brass seat. Brass seated tapered union are used to join two pipes together and are easily disassembled.
19.Cap:Caps are an important part of any plumbing system. They are used to seal the ends of pipes and tubes, create dead ends, isolate sections of pipes for maintenance or repair, and protect the ends of pipes and tubes from damage. Malleable iron covers are known for their strength, durability, and corrosion resistance, making them ideal for a variety of applications.
20.Side outlet Elbow:The side outlet elbow is a versatile fitting that can be used in a variety of applications. They are known for their strength, durability, and corrosion resistance, which makes them ideal for use in a variety of piping systems.
21.Extension long piece: An extension piece in malleable iron pipe fittings is a fitting used to extend the length of a pipe. Extensions are typically made from malleable iron, a strong and durable material that resists corrosion and rust.
22.Reducing nipple: A reducing nipple is a pipe fitting used to connect two pipes of different diameters. A reducer has a threaded end on each side, with the thread diameter gradually decreasing from one end to the other. This allows the reducer to be screwed onto a larger diameter pipe on one end and onto a smaller diameter pipe on the other end.
23.Twin Elbow: A twin elbow, is a type of pipe fitting used in malleable iron pipe systems. It consists of two 90-degree elbows joined together in a single fitting, allowing for a change in the direction of the pipe run by 180 degrees. Twin elbows are commonly used in plumbing and heating systems, as well as in industrial applications.
24. Lateral Y branch tee: A lateral Y branch tee is a pipe fitting with three outlets. The main outlet is in line with the pipe, while the other two outlets branch off at 90-degree angles. Lateral Y branch tees are used to connect branch lines to the main line.
25.Socket right and left hand thread :In malleable iron pipe fittings, socket right and left hand threads refer to the direction of the threads on the inside of the fitting. These threads are used to connect the fitting to pipes or other fittings.
26.Octagonal cap: An octagonal cap is a pipe fitting used in malleable iron piping systems. It is a threaded fitting used to close the end of a pipe or create a sealed connection between two pipes. Octagonal covers are commonly used in plumbing and heating systems as well as industrial applications.
27.Return bend:A return bend, also known as a U-bend or 180-degree elbow, is a pipe fitting used in malleable iron piping systems. It consists of a curved section of pipe that changes the direction of the pipe 180 degrees. Return pipes are commonly used in plumbing and heating systems as well as industrial applications.
28.Street Elbow :A street elbow is a pipe fitting that has external threads on one end and internal threads on the other. Street elbows are used to connect pipes to fittings with different types of threads. Street elbows are also called male and female elbows.
●What Are The Sizes Of Malleable Iron Pipe Fittings?
Malleable iron pipe fittings are available in a variety of sizes to accommodate different pipe diameters and application requirements. The most common sizes of malleable iron pipe fittings are:
* **1/8 inch**
* **1/4 inch**
* **3/8 inch**
* **1/2 inch**
* **3/4 inch**
* **1 foot**
* **1-1/4 inches**
* **1-1/2 inches**
* **2 inches**
* **2-1/2 inches**
* **3 inches**
* **4 inches**
* **6 inches**
* **8 inches**
●Material Standards For Malleable Iron Pipe Fittings
These material standards cover different specifications of malleable iron pipe fittings. Here’s a breakdown of each criterion:
1. BS EN 1562: This is the British Standard for malleable iron fittings. It specifies the requirements for the chemical composition, mechanical properties and dimensions of these accessories.
2. ASTM A197/A197M: This is the American Society for Testing and Materials (ASTM) standard for malleable iron pipe fittings. It covers the chemical composition, mechanical properties and dimensional requirements of these accessories.
3. ASTM A-197: This is the older version of the ASTM standard for malleable iron pipe fittings. It has been superseded by ASTM A197/A197M but may still be referenced in some cases.
4. ASTM A47: This is another ASTM standard that covers requirements for malleable iron castings. While not specifically targeted at pipe fittings, it may still apply to certain types of fittings.
5. DIN EN 1562: This is the German Institute for Standardization (DIN) standard for malleable iron pipe fittings. It specifies the requirements for the chemical composition, mechanical properties and dimensions of these accessories.
6. GB/T 9440: This is the Chinese standard for malleable iron pipe fittings. It covers the chemical composition, mechanical properties and dimensional requirements of these accessories in accordance with Chinese national standards.
These material standards ensure that malleable iron pipe fittings meet specific quality and performance requirements, resulting in compatibility and reliability in a variety of applications.
●Design Standards For Malleable Steel Iron Fittings
1. BS EN 10242: This British Standard specifies the requirements for malleable iron fittings for use with pipes and ducts in water and gas systems. It covers dimensions, tolerances, material requirements and testing procedures.
2. ASME B16.3: This American Society of Mechanical Engineers (ASME) standard specifies requirements for malleable iron threaded fittings used in piping systems. It includes dimensions, ratings, materials, and test methods.
3. ASME B16.14: Another ASME standard that specifies the requirements for malleable iron threaded pipe joints. The standard covers the dimensions, ratings, materials and testing procedures of pipe fittings.
4. ASME B16.39: This ASME standard specifies the requirements for malleable iron threaded pipe fittings with tapered threads. It covers dimensions, ratings, materials and testing methods for these accessories.
5. DIN EN10242: This German standard specifies the requirements for malleable iron fittings for pressure applications. It covers dimensions, materials, testing procedures and marking requirements.
6. GB/T 3287: This Chinese standard specifies the requirements for malleable iron threaded pipe fittings. It covers dimensions, tolerances, materials, mechanical properties and test methods for these accessories.
Collectively, these design standards ensure that wrought steel fittings meet the necessary size, material and performance requirements for a variety of applications.
●Connection Standards For Malleable Iron Pipe Fittings
ISO 7-1:This standard specifies the dimensions, tolerances and designations of pipe threads for pressure sealing joints on threads. It is suitable for the threads of pipes, fittings and valves, as well as the threads of screws and nuts. This standard includes tables of dimensions and tolerances for various thread sizes and types, as well as a system for specifying threads.
ASME B1.20.1: Universal Pipe Thread (Inch), This standard specifies the dimensions, tolerances and codes of universal British pipe threads. It is suitable for the threads of pipes, fittings and valves, as well as the threads of screws and nuts. This standard includes tables of dimensions and tolerances for various thread sizes and types, as well as a system for specifying threads.
GB/T 7306.1: This standard is equivalent to the Chinese version of ISO 7-1. It specifies the dimensions, tolerances and designation of pipe threads for pressure sealing joints on threads. It is suitable for the threads of pipes, fittings and valves, as well as the threads of screws and nuts. This standard includes tables of dimensions and tolerances for various thread sizes and types, as well as a system for specifying threads.
GB/T 7306.2: This standard specifies the inspection methods for pipe thread dimensions and tolerances. It includes procedures for measuring major and minor diameters, pitch diameter, lead and thread angle. The standard also includes acceptance criteria for each dimension and tolerance.
Summary: ISO 7-1 and GB/T 7306.1 are international standards and Chinese standards respectively, which specify the dimensions, tolerances and names of pipe threads. ASME B1.20.1 is an American standard that specifies the dimensions, tolerances, and designations for universal British pipe threads. GB/T 7306.2 is a Chinese standard that specifies verification methods for pipe thread dimensions and tolerances. These standards are important to ensure that pipe threads are compatible and can be assembled and disassembled without leakage.
●Surface Treatment Of Malleable Iron Pipe Fittings
Surface treatment standards for malleable iron pipe fittings can vary depending on the specific requirements and regulations of different industries and applications. However, some commonly used surface treatment standards for malleable iron pipe fittings include:
Blackening treatment: Malleable cast iron pipe fittings are often treated with black coating, which is achieved by coating the surface with black paint or a black oxide protective layer. This black finish is corrosion-resistant and aesthetically pleasing.
Hot-dip galvanizing: Malleable iron pipe fittings can also be hot-dip galvanized, which means the pipe fittings are immersed in a molten zinc bath. The process creates a thick, durable coating with excellent corrosion resistance, making the accessories suitable for use outdoors or in corrosive environments.
Electroplating: Another surface treatment option for malleable iron pipe fittings is electroplating, which involves using an electrochemical process to deposit a layer of metal, such as chromium or nickel, on the surface of the fitting. Plating can enhance the appearance of accessories, provide corrosion resistance and increase wear resistance.