Socket welding elbow: specifications, pressure levels, materials
What are the specifications of socket welding elbows?
What is the pressure rating of socket welding elbow?
What are the materials of socket welding elbows?
Where are socket welding elbows used?
What is the difference between socket weld and fillet weld?
Socket elbow is mainly a high-pressure elbow pipe connection fitting that is formed by die-forging blanks of round steel or steel ingots, and then machined with a lathe. It is a type of forged socket series pipe fittings.
Advantages of socket welding
(1) The connection strength is high and the pull-out resistance is the strongest among various connection technologies.
(2) The material cost is low and economical.
(3) Good temperature resistance. Compared with other linking methods, one-time installation does not require maintenance for a lifetime.
(4) Socket welding is used in a wide range of project case accessories;
(5) During installation, it is only necessary to inflate the tube as a body oxidation protection, and use inert gas (argon) to isolate the air, protect the solder joints, and maintain the chemical composition, thereby protecting its mechanical properties.
(6) Under the condition of oxidation protection welding during welding, the welding joint can 100% achieve the effect of the pipe body itself.
What are the specifications of socket welding elbows?
According to the form, it is divided into 45° socket elbow and 90° socket elbow.
According to common standards, the specifications of socket elbows are DN6, DN8, DN10, DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, and DN100.
The commonly used ordering specifications are DN15—-DN50.
What is the pressure rating of socket welding elbow?
Distinguished according to pressure level: 3000LB, 6000LB, 9000LB or SCH80, SCH160, XXS
What are the materials of socket welding elbows?
Commonly used raw materials for socket pipe fittings are generally divided into carbon steel, stainless steel, alloy steel, etc.
Commonly used grades of carbon steel include Q235, 20#, A105, etc.;
Commonly used grades of stainless steel include 304, 304L, 316, 316L, 321, 00Cr17Ni14Mo2, etc.;
Commonly used grades of alloy materials include 15CrMo, 1Cr5Mo, 16Mn, 12Cr1MoV, F11, F22, 10CrMo910, etc.
Other materials: copper alloy, nickel alloy, etc.
Where are socket welding elbows used?
It is mainly suitable for departments and fields that require high pressure and precise dimensions such as petrochemical industry, medicine and health, electric power, aerospace, military industry, fire protection, metallurgy, shipbuilding, gas, nuclear power, and environmental protection.
What is the difference between socket weld and fillet weld?
| Characteristic | Socket Weld | Fillet Weld |
|---|---|---|
| Joint Type | Used for joining pipes or fittings where the pipe penetrates into a recessed area of the fitting | Used for joining two surfaces at right angles to each other |
| Welding Configuration | Requires a beveled end on the pipe, which fits into a socket or “socket weld” fitting | Does not require a beveled end on the members; commonly used on lap joints, T-joints, and corner joints |
| Joint Strength | Generally stronger than fillet welds due to the deep penetration and full fusion | Strength may vary based on the size of the weld, but typically less than the strength of socket welds |
| Fillet Size | Not applicable; socket welds involve a groove or recess for the pipe to fit into | Refers to the leg length of the triangle-shaped weld |
| Welding Process | Requires pre-welding preparation, including beveling and proper fitting | Can be applied directly to the joint without extensive preparation |
| Application | Commonly used in high-pressure piping systems and where a smooth flow is important | Widely used for structural joints, general fabrication, and situations where pressure considerations are not as critical |
| Appearance | Leaves a smooth and clean exterior surface as the weld is inside the socket | Visible on the exterior of the joint, forming a triangular shape between the two intersecting surfaces |
| Inspection and Testing | Easier to inspect due to the visible socket | Inspection involves measuring the fillet size and checking for proper leg length and throat thickness |