Forged Elbow is one of the common pipe fittings applied in oil&gas industry. An elbow provides a change in material-flow direction. This adds pressure losses to the system due to impact, friction and re-acceleration.As product enters the inlet of the elbow, it typically continues moving straight ahead to the first (or primary) impact zone. The product is then deflected at an angle toward the outlet of the elbow. The deflection angle is determined by the elbow design, the product’s characteristics, the conveying velocity, and specific load (also called the product-to-gas ratio). In many designs, the product will hit one or more secondary impact zones before exiting the elbow.
Impact forces can cause severe degradation of fragile or breakage-sensitive products, generating a large amount of fines or dust and creating quality issues. Heat-sensitive products, such as plastic pellets, can overheat on the contact surface this can result in unwanted tails or streamers on the pellet or film build-up on the surface of the elbow, which can eventually lead to product contamination. Abrasive products can cause wear, leading to work-out elbows and system leaks and causing maintenance and safety issues
45-Degree and 90-Degree Elbow Fittings with SW& Threaded Connection Ends.
Pressure: 2000LBS, 3000LBS, 6000LBS, 9000LBS
Size: from 1/8″ to 4″
Material: ASTM A105, F304, F316, F304L, F316L, A182 F11/F22/F91
Connection ends: socket weld and threaded
Threaded Pipe Fitting SS304 Precision Cast Fittings
Threaded Pipe Fitting SS304 with 90 degrees Elbow, Class 150lb, Male and Female Thread.
Size: 1/2 to 4 inchesb
SS304 90 degrees elbow, class 150lb, with male and female thread
Materials: SS304 and SS316
Manufacturing standards: ANSI, JIS, and DIN
Forged SR (Short Radius) Elbows
These forged elbows have a Center-to-Face dimension of 1.0 X diameter. They are typically used in tight areas where clearance is the main issue.
Forged LR (Long Radius) Elbows
These forged elbows have a Center-to-Face dimension of 1.5 X diameter. They are the most common type of forged elbow and used when space is available and flow is more critical.
Elbows are categorized based on various design features as below:
- Long Radius (LR) Elbow is also called LR elbow – means the radius is 1.5 times the pipe diameter
- Short Radius (SR) Elbow is also called SR elbow, – means the radius is 1.0 times the pipe diameter
- Short radiu 45°Elbow: Short radius 45° elbow changes the direction by 45 degrees.
- Short radius 90°Elbow: Short Radius 90° elbow is same as LR90 except for the measurement between end of elbow to center line is 1 x NPS.
- Short radius 180° Elbow: Short Radius 180° return bend allows complete reversal of flow