# 12D Pipe bending

A 12D pipe bending is a pipe bend that the bend radius is 3 times the pipe outside diameter.

What is 12D in bend pipe?

The RADIUS of a 12D pipe bend is actually what is 5 times the nominal diameter. So if you had a 10″ diameter pipe, the radius of the centerline of the bend would be 50 inches.
How do you know a 3d or 12d bend?

It is the radius of bend of the elbow with reference to a point,the point is determined by the intersection of two lines from the elbows socket end (which makes the shape of one quater of a circle). The bend ie; 3d,5d,7d,12d is determined from that point of intersection as a multiple of elbows diameter.
Pipe bend, Bend pipe, Pipe bending, ANSI, ISO, JIS and DIN Standards, Measures 1/2 to 56 Inches.

The bend is used to change the direction of run of pipe.it advantage is can matach long distance transition requirements,so it is commonly that bends dimension according to customer design. usually,the bends consist of 3D,5D,7D even 12D series.carbon steel bend

Key Specifications/Special Features:

Bending radius(R): R=3D, 4D, 5D, 6D, 7D, 8D, 9D, 10D, 12D
Bending angle (θ):15°, 30°, 45°, 60°, 90°, 135°, 180°
Straight Length (L): The length between two ends general from 300mm-1500mm
Outer diamete(D): D≤1800mm
Wall thickness(T): T≤120mm
Eend bevel: according to the bevel of welding pipe fittings construction

all the size can product according to the clients’ requiry.

Materials
Carbon steel: ASTM/ASME A234 WPB-WPC
Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911
Stainless steel: 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: ASTM/ASME A402 WPL 3-WPL 6
High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70

Pressure: SCH5 to SCH160
Standard: ANSI B16.9/B16.28 and MSS SP-43/SP-75
12D Pipe bending Fittings Key Specifications / Features

Carbon Stainless Steel 7D pipe bending, 7D Pipe bending fittings
Materials: carbon steel, stainless steel A234, A403, F304, F304L, F316 and F316L
Thickness: SCH5 to SCH160
Types: 12D Bends
Size: 1/2 to 72 inches (DN15 to DN1,800mm)
Manufacturing standards: ANSI, ISO, JIS and DIN