Process Section – Daily Hydrogenation Process Knowledge Question No. 014

Elbows, tees, reducers, flanges, pipe fittings, etc

Elbows, tees, reducers, unions, flange covers, blind flanges, reduced tees, pipe caps, threaded splices, etc

With the development of the petrochemical industry, engineering projects are becoming larger and more complex. The fittings used in piping systems also come in a wide variety, depending on the operating conditions. Fittings used for changing the direction of pipes, branching pipes, or connecting pipes of different sizes are subjected to much more demanding operating conditions than straight pipes. The materials used for pipe fittings can include pipes, sheets, forgings, castings, rods, and profiles, etc. Processing methods such as welding, stamping, casting, or forging can be employed for their fabrication. Typically, the material and thickness of pipe fittings depend on factors such as the material used for the fittings, their shape and size, as well as the fluid being transported and the pressure involved.

Flanges, flange covers, elbows, reducers, eccentric elbows, tees, end caps, pipe caps, etc

Elbows, tees, reducers, unions, flange covers, blind flanges, reduced tees, pipe caps, etc

Elbows, tees, reducers, unions, flange covers, blind flanges, reduced tees, pipe caps, etc

Seamless elbows, reducers, short reducer joints, tees, crosses, flanges, etc.

There are many types of pipe fittings, which are classified here based on purpose, connection method, material, and manufacturing process. By purpose: 1. Fittings used for connecting pipes together include: flanges, couplings, pipe clamps, band clamps, sleeve fittings, collar clamps, etc.; cold-drawn welded tees. 2. Fittings used to change the direction of pipes: elbows, bends. 3. Fittings used to change the diameter of pipes: reducers (different-diameter joints), reduced elbows, branch connections, reinforcement pipes. 4. Fittings used to create additional branches in a piping system: tees, crosses. 5. Fittings used for sealing pipes: gaskets, tape, hemp rope, flange blind plates, pipe plugs, blind plates, end caps, welded plugs. 6. Fittings used to secure pipes: clamps, hooks, lifting rings, supports, brackets, pipe hangers, etc. By connection method: 1. Welded fittings. 2. Threaded fittings. 3. Sleeve-type fittings; welded steel pipe flanges with necks. 4. Clamp-type fittings. 5. Socket-type fittings. 6. Adhesive-connected fittings. 7. Heat-fusion fittings. 8. Elastic-bonding double-fusion fittings. 9. Fittings connected using rubber rings. By material: 1. Cast steel fittings. 2. Cast iron fittings; welded elbows. 3. Stainless steel fittings. 4. Plastic fittings. 5. PVC fittings. 6. Rubber fittings. 7. Graphite fittings. 8. Forged steel fittings; PPR fittings. 9. PPR pipes. 10. Alloy fittings. 11. PE fittings. 12. ABS fittings

Elbows, tees, reducers, unions, flange covers, blind flanges, reduced tees, pipe caps, etc