The "Customized Part Library" for Pipeline Systems Empowering High-End Manufacturing

Definition of Pipe Fittings​

A pipe fitting is a general term for components in a piping system that serve functions such as connection, control, direction change, flow division, sealing, and support.​

Basic Introduction to Pipe Fittings​

All steel pipe fittings are pressure-bearing pipe fittings. Based on different processing technologies, they can be divided into four major categories: butt-welded pipe fittings (including both welded and non-welded types), socket-welded pipe fittings, threaded pipe fittings, and flanged pipe fittings.​

Common Classifications​

Pipe fittings come in a wide variety and can be classified from multiple dimensions, including application, connection method, material, manufacturing method, manufacturing standard, radius of curvature, and pressure class:

​By Application​

Pipe Connection Type: Used to connect pipes to each other, including flanges, unions, pipe couplings, clamps, ferrules, hose clamps, etc.​

Direction Change Type: Used to change the direction of pipes, mainly including elbows and bends.​

Pipe Diameter Change Type: Used to adjust the diameter of pipes, including reducers (eccentric/reducing pipes), reducing elbows, branch outlets, and reinforcement pipes.​

Branch Addition Type: Used to add branches to the pipeline, such as tees and crosses.​

Pipeline Sealing Type: Used to ensure the sealing effect of the pipeline, including gaskets, thread seal tape, hemp yarn, blind flanges, pipe plugs, blinds, heads, and welded plugs.​

Pipeline Fixing Type: Used to fix the pipeline, including snap rings, drag hooks, lifting rings, supports, brackets, pipe clamps, etc.​

By Connection Method​

Divided into welded pipe fittings, threaded pipe fittings, ferrule pipe fittings, clamp pipe fittings, socket pipe fittings, adhesive-bonded pipe fittings, hot-melt pipe fittings, curved elastic double-melt pipe fittings, and rubber ring-connected pipe fittings.​

By Material​

Cast Steel Pipe Fittings: Corresponding standards: ASTM/ASME A234 WPB, WPC.​

Cast Iron Pipe Fittings.​

Stainless Steel Pipe Fittings: Covering models such as ASTM/ASME A403 WP 304-304L-304H-304LN-304N, ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti, ASTM/ASME A403 WP 321-321H, ASTM/ASME A403 WP 347-347H.​

Low-Temperature Steel Pipe Fittings: Standard: ASTM/ASME A402 WPL3-WPL 6.​

High-Performance Steel Pipe Fittings: Corresponding to ASTM/ASME A860 WPHY 42-46-52-60-65-70.​

Pipe Fittings of Other Materials: Also include forged steel pipe fittings, plastic pipe fittings, PVC pipe fittings, rubber pipe fittings, graphite pipe fittings, PPR pipe fittings, alloy pipe fittings (e.g., ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP911, 15Mo3, 15CrMoV, 35CrMoV), PE pipe fittings, ABS pipe fittings, as well as pipe fittings made of cast steel, alloy steel, copper, aluminum alloy, and asphalt.​

By Manufacturing Method​

Divided into pushed pipe fittings, pressed pipe fittings, forged pipe fittings, cast pipe fittings, etc.​

By Manufacturing Standard​

Including national standards (GB), electric power standards (DL), shipbuilding standards (CB), chemical industry standards (HG), water industry standards (CJ), American standards (ANSI/ASME), German standards (DIN), Japanese standards (JIS), Russian standards (GOST), etc.​

By Radius of Curvature​

Long Radius Elbow: The radius of curvature is equal to 1.5 times the outer diameter of the pipe, i.e., R=1.5D (where D is the elbow diameter and R is the radius of curvature).​

Short Radius Elbow: The radius of curvature is equal to the outer diameter of the pipe, i.e., R=1.0D.​

By Pressure Class​

There are approximately 17 pressure classes, consistent with American pipe standards, namely: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS, Sch80, SCH100, Sch120, Sch140, Sch160, XXS. Among them, STD and XS are the most commonly used classes.​