Induction Bends - Pipe Fittings - Product Catalog

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Induction Bends

Model No.︰	ANSI/ASME B16.4
Brand Name︰	ANSI/ASME B16.49
Country of Origin︰	-
Unit Price︰	-
Minimum Order︰	-

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Product Description

Specification:

ANSI/ASME B16.49-2001
ASME B31
MSS　SP-75-1998

ISO 15590-2 Petroleum and natural gas industries - induction bends, fittings and flanges for pipeline transportation systems Part 2: Fittings

EN 14870-1,2,3 Petroleum and natural gas industries. Induction bends, fittings and flanges for pipeline transportation systems. Flanges

Outside diameter: 25-φ1620
Bend radius:3-12m(9.84ft-40 ft)
Max wall thickness: 120mm(4.7in)
Angle≤90°

Mother Pipe: Carbon Steel, Alloy Steel, Stainless Steel, High Chrome Steel, High Nickel High Chrome Steel, Monel Metal, Copper Alloy, Titanium.

NB	O.D. (mm)	Radius	W/T (mm)	Curve (θ)
20	25	2D-5D	1.5-3	0°-180°
25	32	2D-5D	2-4
32	38	2D-5D	3-5
40	45	2D-10D	3-5
50	57、60	3D-10D	4-8
65	76	3D-10D	4-10
80	89	3D-10D	4-12
100	108、114	3D-10D	5-12
125	127、133	3D-10D	6-20
150	159、168	3D-10D	6-20
200	219	3D-10D	6-30
250	273	3D-10D	6-30
300	325	3D-10D	7-30
350	356、377	3D-10D	7-30
400	406、426	4D-9D	8-30
450	457	4D-9D	8-30
500	508、529	4D-9D	9-30
550	559	4D-9D	9-30
600	630	4D-9D	9-30
650	660	4D-9D	9-30
700	711、720	4D-9D	9-30
750	762	4D-9D	11-30	0°-90°
800	820	4D-9D	12-30
850	864	4D-9D	13-30
900	914、920	4D-8D	13-30
950	965	4D-8D	13-30
1000	1016、1020	4D-7D	14-30
1050	1067	4D-7D	14-30
1100	1118、1120	4D-7D	14-30
1150	1168	4D-6D	14-25
1200	1220	4D-6D	14-25

Specifications︰

Induction Bending is a controlled means of bending pipes through the application of local heating using high frequency induced electrical power.

Originally used for the purpose of surface hardening steels, induction technology when used in pipe bending consists basically of an induction coil placed around the pipe to be bent. The induction coil heats a narrow, circumferential section of the pipe to a temperature of between 850 and 1100 degrees Celsius (dependant on the material to be formed). As the correct bending temperature range is reached, the pipe is moved slowly through the induction coil whilst the bending force is applied by a fixed radius arm arrangement.

As the bending occurs, the adjacent area forward of the heat band is water or air quenched (or may be allowed to cool naturally) thereby allowing the cool material to either side of the ‘heat band’ to retain the integrity of the original material as best as possible. This means of distortion control provides excellent dimensional accuracy and repeatability.

Achieved tolerances when forming induction bends are to some extent governed by the materials in hand and the required format of the finished product however the following are the minimum standards to which Induction Pipe Bending UK Ltd operate:

Angle:
Radius:
Linear distances:
Linear plane:
+ / - 0.5 degrees
+ / - 1.0% of nominal
+ / - 3.0mm (1.5” to 12” NB & + / - 5.0mm from 12” to 20” NB)
+ / - 1.0% of centre line radius

Although induction bending produces excellent results as far as physical properties are concerned, it must be noted that there are two important considerations required – firstly the reduction in wall thickness at the outside (extrados) of the bend and secondly the degree of ovality which is present.

The induction pipe bending process uses induction heating to produce highly accurate bends. The quality of induction bends is superior to the elbow fitting. Hydro burst tests show that spools with induction bends fail in the straight pipe and not in the bend, whereas in comparable elbow-based systems the elbow (inside radius) is always the first to burst. Stress calculations confirm this. The natural tendency to have a thicker inside wall thus proves to be advantageous and ensures that the bend exceeds the strength of the straight pipe. Many companies have exclusively chosen Cojafex equipment for their induction bending. These benders are used in the following industries:

Chemical and petrochemical
Power generation
Pipeline, on and offshore, including compressor and pump stations
Ship building
Construction (structural shapes)

ANSI/ASME B16.9-2001
ASME B31
MSS　SP-75-1998
ISO 15590-2 Petroleum and natural gas industries - induction bends, fittings and flanges for pipeline transportation systems Part 2: Fittings

Standard Met︰

ANSI/ASME B16.49-2001 Factory-Made Wrought Steel Buttwelding Induction Bends for Transportation and Distribution Systems

This Standard covers design, material, manufacturing, testing, marking, and inspection requirements for factory-made pipeline bends of carbon steel materials having controlled chemistry and mechanical properties, produced by the induction bending process, with or without tangents. This Standard covers induction bends for transportation and distribution piping applications (e.g., ASME B31.4, B31.8, and B31.11) Process and power piping have differing requirements and materials that may not be appropriate for the restrictions and examinations described herein, and therefore are not included in this Standard.

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