3. ASME B16.9 fittings

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90˚ Elbow Short

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Description

The 90˚ Elbow is a pipe fitting used to change the direction of flow of liquids or gases in a piping system. Its bend angle is 90 degrees, allowing for a sudden change in flow direction. The Short Radius (Short Radius Elbow) has a shorter bend radius compared to the Long Radius Elbow, meaning its bend radius is equal to the pipe diameter (1D).

Applications

Commonly used in piping systems in industries such as oil and gas, chemicals, power, and construction. Suitable for applications that require space-saving and in locations with limited space. Used in systems that need to change the flow direction quickly and efficiently.

Standard Specification

Standards:

Popular international standards for 90˚ Elbow Short include ASME B16.9, ASTM, ANSI, ISO, and DIN. These standards define dimensions, materials, tolerances, and other technical requirements to ensure the quality and safety of the fittings.

Dimensions:

The dimensions of the 90˚ Elbow Short are determined by the nominal diameter (Nominal Diameter – ND) of the pipe. Common sizes range from 1/2 inch (DN 15) to 48 inches (DN 1200). Specific dimension tables may include parameters such as:

Outside Diameter (Outside Diameter – OD)
Wall Thickness (Wall Thickness)
Bend Radius (Bend Radius)
Overall Length (Overall Length)

Dimensions and Thickness of 90˚ Elbow Short according to ASME B16.9

DN (inch)	OD (mm)	SCH 10S (mm)	SCH 20 (mm)	SCH 30 (mm)	SCH 40S (mm)	SCH 60 (mm)	SCH 80S (mm)	SCH 100 (mm)	SCH 120 (mm)	SCH 140 (mm)	SCH 160 (mm)
1/2 (DN 15)	21.3	1.65	2.11	2.41	2.77	3.73	3.73	4.78	5.54	6.35	7.47
3/4 (DN 20)	26.7	1.65	2.11	2.41	2.87	3.91	3.91	5.56	6.35	7.04	7.82
1 (DN 25)	33.4	1.65	2.77	3.38	3.38	4.55	4.55	6.35	7.62	8.08	9.09
1 1/2 (DN 40)	48.3	1.65	2.77	3.68	3.68	5.08	5.08	7.14	8.74	9.70	10.97
2 (DN 50)	60.3	1.65	2.77	3.91	3.91	5.54	5.54	8.74	10.92	12.70	15.09
3 (DN 80)	88.9	2.11	3.05	5.49	5.49	7.62	7.62	11.13	15.24	15.24	17.48
4 (DN 100)	114.3	2.11	3.05	6.02	6.02	8.56	8.56	12.70	18.26	19.05	21.95
6 (DN 150)	168.3	2.77	4.78	7.11	7.11	11.13	11.13	15.09	22.23	25.40	28.58
8 (DN 200)	219.1	2.77	6.35	8.18	8.18	12.70	12.70	19.05	27.79	28.58	33.32
10 (DN 250)	273.0	3.40	6.35	9.27	9.27	15.09	15.09	22.23	31.75	34.29	38.10
12 (DN 300)	323.8	3.96	6.35	10.31	10.31	17.48	17.48	25.40	35.05	37.49	42.16

Materials:

Carbon Steel: ASTM A234 WPB, WPC widely used in high-pressure and high-temperature applications, suitable for industrial piping systems.
Stainless Steel: ASTM A403 WP304, WP316 suitable for high-corrosion environments, used in food, pharmaceuticals, and high-cleanliness applications.
Alloy Steel: ASTM A234 WP11, WP22 used in high-temperature and high-pressure applications, commonly found in power and petrochemical industries.
Cast Iron: ASTM A536 good wear resistance, commonly used in water and wastewater systems.
Copper: ASTM B16 good thermal and electrical conductivity, used in electrical applications and plumbing systems.
Aluminum: ASTM B241 lightweight and corrosion-resistant, commonly used in aerospace and automotive industries.
PVC (Polyvinyl Chloride): ASTM D1785 lightweight, easy to install, and corrosion-resistant, widely used in plumbing and chemical processing systems.
HDPE (High-Density Polyethylene): ASTM D3350 durable, chemical-resistant, and flexible, commonly used in water and gas piping systems.

Material Summary Table of 90˚ Elbow Short according to ASME B16.9 standard

Material	Standard	Mechanical Properties	Applications
Carbon Steel	ASTM A234 WPB	Tensile Strength: 415-585 MPa	Oil and gas, industrial water systems
Stainless Steel	ASTM A403 WP304/316	Tensile Strength: 485-700 MPa	Chemicals, food, pharmaceuticals
Alloy Steel	ASTM A234 WP5/WP9	Tensile Strength: 415-585 MPa	High temperature, high pressure
Copper	ASTM B61/B62	Tensile Strength: 205-275 MPa	Water supply systems, HVAC
Aluminum	ASTM B241/B345	Tensile Strength: 140-310 MPa	HVAC systems, heat conduction
PVC/CPVC	ASTM D2466/D2846	Tensile Strength: 34-55 MPa	Plumbing, light chemical processing
HDPE	ASTM D3350	Durable, chemical-resistant	Water and gas piping systems