Common Pipe Fittings Classification

Common pipe fittings classification

Pipe fittings are a general term for parts that play the role of connection, control, direction change, diversion, sealing, support, etc. in the pipeline system. Pipe fittings cover a wide range, and common ones include flanges, unions, pipe clamps, ferrules, throat clamps, tees, etc. What are the main uses of these pipe fittings? How to classify them? Let's take a look at the classification of common pipe fittings in this article.

According to the purpose

✔ Flange: a part that connects pipes to each other, mainly used for connection between pipe ends.

✔ Union: also known as oil joint, mainly used for matching hardware accessories connection, can be installed in various pipe interfaces for use.

✔ Pipe clamp: a common accessory in industrial pipeline connection, used to connect a short section of two pipes.

✔ Ferrule: a stainless steel pipe connector, mainly used in mechanical pipe connection systems such as water treatment and municipal water supply systems.

✔  Throat clamp: an ideal connection fastener, suitable for fasteners for connecting soft and hard pipes above 30mm, with beautiful appearance after assembly.

✔ Elbow: A commonly used pipe fitting for plumbing installation, used for connecting pipe bends and changing the direction of pipes.

✔ Bend: A set of bending dies are used for bending. Most machines, equipment and pipes use bends.

✔ Reducer: Also known as reducer, used for connecting two pipes of different diameters, and divided into concentric reducers and eccentric reducers.

✔  Reducing elbow: Changes the diameter of the pipe when making a 90-degree turn. There are hot-push elbows, stamped elbows and welded elbows.

✔  Branch: A reinforced pipe fitting used for branch pipe connection, instead of using reducing tees, reinforcement plates, reinforced pipe sections and other connection types.

✔ Tee: Tee is a pipe connector, also called pipe tee or tee pipe fitting, tee joint, used at the branch pipe of the main pipe.

✔ Cross: Used to connect four pipes with the same diameter and the same verticality, mainly used for diversion or direction change.

✔ Gasket: a material placed between two planes to strengthen the seal, and a sealing element set between tight covers to prevent fluid leakage.

✔ Raw tape: an auxiliary product commonly used in plumbing installation, used at the joints of pipe fittings to enhance the tightness of pipe joints.

✔ Wire hemp: an auxiliary product commonly used in plumbing installation, used to wrap around the threads of pipe fittings, which can play a sealing role and prevent water leakage.

✔ Blind flange: also known as blind flange, the real name is blind plate, which is a form of flange connection, in fact, it is a flange without a hole in the middle.

✔ Pipe plug: refers to an external threaded pipe fitting used to plug the internal thread of the end of the pipe, including square pipe plug, hexagonal pipe plug, etc.

✔ Head: a component of a container, refers to a component used to close the end of the container to isolate the internal and external media, also known as an end cover.

✔ Welding plug: used to protect some parts of the welded parts that need to be protected or are easily injured or deformed during welding.

✔  Pipe clamp: a pipe fitting used to fix the pipeline, a pipe fitting commonly used in plumbing installation, used to fix the pipeline.

✔ Valve: A control component in a fluid delivery system, which has functions such as cutoff, regulation, flow diversion, pressure stabilization, flow diversion or overflow pressure relief.

✔ Compensator: It is composed of the bellows of its working body and accessories such as end pipes, brackets, flanges, and conduits, and is a compensating element.

✔  Decontaminator: Prevents impurities in the pipeline medium from entering the transmission equipment or precision parts, causing production failures or affecting product quality.

✔ Reinforcement pipe: Reinforcement means increasing strength. It improves the strength of the area by increasing the force-bearing area, and is basically a forging pipe.

✔ Clasp: It is the main retainer for removable denture restoration, made of metal, and mainly plays a role in retention, stability and support.

✔ Tow hook: It refers to the hook on the tugboat for hooking the towline and facilitating release. It can be divided into spring tow hooks, hydraulic tow hooks, remote control tow hooks, etc.

✔ Lifting ring: It is a kind of industrial lifting device, a device for lifting heavy objects in lifting machinery. Common lifting rings include round lifting rings, pear-shaped rings, etc.

✔ Bracket: The truss supporting the middle roof truss is called a bracket. It is generally a parallel chord truss, and its web member adopts a herringbone system with vertical rods.

According to the connection method

✔ Welded pipe fittings: Pipe fittings connected to pipes by welding, including elbows, flanges, tees, reducers, caps, etc.

✔ Threaded pipe fittings: Pipe fittings with threads, commonly used in water and gas pipes, small diameter water pipes, compressed air pipes and low-pressure steam pipes, etc.

✔ Casing pipe fittings: A new type of quick pipe connector with good sealing performance and can be used repeatedly. It is suitable for pipeline systems of oil, gas and general corrosive media.

✔  Clamp pipe fittings: Used to tighten the connection between quick connectors, including clamps, quick connectors, silicone sealing gaskets, chuck blind plates, etc.

✔ Socket pipe fittings: A high-pressure pipeline connection fitting formed by round steel or steel ingot die-forged blanks and processed by lathes.

✔ Curved elastic double-melt pipe fittings: pipe fittings with ports of the same size as the pipe to be connected, connected by hot-melt butt welding.

✔ Adhesive pipe fittings: pipe fittings connected by solvent-based adhesives, such as PVC plastic pipes.

✔ Rubber ring connection pipe fittings: composed of pipe fitting body, sealing end cover, and sealing rubber ring.

According to material

✔ Steel pipe fittings: The design thickness of cast steel pipes is large and heavy, its weldability is poor, and the carbon content is high, so the welds need to be heat treated on site.

✔ Rubber pipe fittings: mainly used for industrial, mining, and civil transportation and suction of liquids and gases, including rubber hoses, rubber sealing pads, rubber grouting pipes, etc.

✔ Cast iron pipe fittings: pipes cast by cast iron, including water supply cast iron pipes, sand mold centrifugal cast iron straight pipes, drainage cast iron pipes, etc.

✔  Stainless steel pipe fittings: including stainless steel elbows, stainless steel tees, stainless steel crosses, stainless steel reducers, stainless steel pipe caps, etc.

✔ Plastic pipe fittings: Made of synthetic resin as raw material, stabilizer, lubricant, plasticizer and then extruded. Mainly used as water supply system piping, drainage, exhaust and sewage sanitary pipes, rainwater pipes, wire threading pipes, etc.

✔ PVC pipe fittings: Made of polyvinyl chloride resin, stabilizer, lubricant, etc., extruded by hot pressing, can be divided into PVC-U pipe, PVC-M pipe and PVC-O pipe.

✔ Graphite pipe fittings: refers to the combination of impermeable graphite tubes and pipe fittings, mainly used for conveying corrosive media without metal ion pollution, and also has good thermal conductivity.

✔ Forged steel pipe fittings: Pipe fittings made by forging. Forging is forged by impact force, including forged steel flanges, forged steel reducers, forged steel tees, etc.

✔  PPR pipe fittings: including U-shaped pipe clamps, blind valves, equal-diameter tees, flanges, flange iron rings, pipe plugs, etc. PPR key connections are hot-melt and have high plasticity.

✔  Alloy pipe fittings: Made of alloy steel, including alloy tees/crosses, alloy reducers, alloy heads, flanges, etc.

✔  PE pipe fittings: Can be used for connecting various soft belts, such as connecting PE pipes, UPVC, steel pipes, etc.

✔  ABS pipe fittings: Made of a resin copolymerized from three monomers of acrylonitrile, butadiene and styrene, it is an engineering plastic with high strength, high impact resistance, high hygiene performance and high anti-aging.