ANSI/ASME B16.9 Buttweld 1.5D Bend, 1.5D pipe elbow: ASME B16.9 / B16.28, MSS SP-75.

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BW 1.5D Elbow Fittings Specifications

Dimensions:
ANSI B16.9, MSS SP-75, ASME B16.28.
Size:
Seamless: NPS 1/2" to 24", OD 21.3 mm to 609.6 mm.

Welded: NPS 26" to 72" and larger, 660.4 mm to 1829 mm and larger.
Thickness:
SCH 5, SCH 10, SCH 20, SCH 30, SCH 40 (STD), SCH 60, SCH 80 (XS), SCH 100, SCH 120, SCH 140, SCH 160, XXS (Double Extra Strong).
Form:
1.5D Bends: Long Radius, Short Radius, Custom Radius, Segmented Bends, Mitred Bends, 45-Degree, 90-Degree, 180-Degree Return Bends.
Materials:
Stainless Steel, Carbon Steel, Alloy Steel, Super Duplex, Duplex Steel, High Nickel Alloys, Copper Nickel.

Certified ISO Manufacturer of GI 1.5D Pipe Bend, 1.5D long & Short radius elbow, 1.5D carbon steel bend, 1.5D stainless steel elbow, 1.5D bend fitting in size range from 1/2" to 72" Inch.

A 1.5D elbow is a specialized pipe fitting designed to change the direction of flow in piping systems. The term "1.5D" indicates that the radius of the elbow's curve is 1.5 times the nominal diameter (D) of the pipe it is connected to. For example, if the pipe diameter is 4 inches, the 1.5D elbow will have a bend radius of 6 inches. The 1.5D elbow's compact design makes it ideal for systems where space is a premium and where a sharp change in direction is required without significantly impacting the flow characteristics.

1.5D Bends are particularly useful in applications where space constraints necessitate a tighter bend radius compared to other standard elbows, such as 2D or 3D elbows, which have larger bending radii. The compact design of the 1.5D elbow makes it ideal for installations requiring efficient use of space while still maintaining smooth flow characteristics.

A seamless 1.5D elbow is manufactured from a single piece of material without any welded joints. The production process involves heating a solid billet, then shaping it into an elbow through a series of rolling and forming operations. This method ensures a uniform structure and strength throughout the elbow, making it highly reliable and capable of withstanding high pressure and temperature conditions.

A welded 1.5D elbow is made by bending a pipe and then welding the seam. This process can involve welding a single seam or multiple seams, depending on the elbow's size and required specifications. The welded elbows are usually subjected to heat treatment and rigorous quality inspections to ensure the weld's integrity and overall performance.

ASME B16.9 1.5D Bends Dimensions

ASME B16.9 1.5D Elbow / Bends Dimensions

NPS (Nominal Pipe Size)	A (mm)	B (mm)	C (mm)
1/2"	38	21.3	2.77
3/4"	57	26.7	2.87
1"	76	33.4	3.38
1 1/2"	114	48.3	3.68
2"	152	60.3	3.91
2 1/2"	190	73.0	5.16
3"	229	88.9	5.49
4"	305	114.3	6.02
6"	457	168.3	7.11
8"	610	219.1	8.18
10"	762	273.1	9.27
12"	914	323.9	9.52
14"	1067	355.6	9.52
16"	1219	406.4	9.52
18"	1372	457.0	9.52
20"	1524	508.0	9.52
24"	1829	610.0	9.52

Tolerances for 1.5D Elbows

Tolerance Category	Specification	Tolerance
Outside Diameter (OD) Tolerances	OD ≤ 1.5 in. (38 mm)	±0.06 in. (±1.5 mm)
	1.5 in. < OD ≤ 4 in. (38 mm < OD ≤ 100 mm)	±0.09 in. (±2.3 mm)
	4 in. < OD ≤ 24 in. (100 mm < OD ≤ 610 mm)	±0.12 in. (±3 mm)
	OD > 24 in. (610 mm)	±0.19 in. (±4.8 mm)
Wall Thickness Tolerances	Minimum wall thickness at any point	Not less than 87.5% of nominal thickness
	Maximum wall thickness	Not specified
Center-to-End (A) Tolerances	NPS ≤ 10	±0.06 in. (±1.5 mm)
	12 ≤ NPS ≤ 18	±0.12 in. (±3 mm)
	20 ≤ NPS ≤ 24	±0.19 in. (±4.8 mm)
Angle Tolerances	All sizes	±1°
Radius (R) Tolerances	All sizes	±5% of nominal radius
Out-of-Roundness (Ovality)	OD ≤ 1.5 in. (38 mm)	±1.5% of OD
	OD > 1.5 in. (38 mm)	±1% of OD
Alignment Tolerances	NPS ≤ 10	±0.06 in. (±1.5 mm) per foot (305 mm)
	NPS > 10	±0.09 in. (±2.3 mm) per foot (305 mm)