ASME B16.49,API 5L,EN 14870-1,ISO 15590-1 Hot Induction Bend,Factory Bend

ASME B16.49,API 5L,EN 14870-1,ISO 15590-1 Hot Induction Bend,Factory Bend

Model No.︰-

Brand Name︰ Induction Bend,Factory Bend

Country of Origin︰-

Unit Price︰US $ 1500 / MT

Minimum Order︰5 MT

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Product Description

Induction Bends

Scope of Supply

Nominal Pipe Size in

Outside diameter O.D.(mm) BENDING RADIUS(mm) Angle Bending
Tangent Length at Each end Wall Thickness (mm)
3D 4D 5D 6D 8D 10D
3" 89 267 356 445 534 712 890 90°,60°
350 Sch STD,
4" 114 342 456 570 684 912 1140 350
6" 168 504 672 840 1008 1344 1680 350
8" 219 657 876 1095 1314 1752 2190 700
10" 273 819 1092 1365 1638 2184 2730 700
12" 325 975 1300 1625 1950 2600 3250 700
14" 356 1068 1424 1780 2136 2848 3560 700
16" 406 1218 1624 2030 2436 3248 4060 700
18" 457 1371 1828 2285 2742 3656 4570 1000
20" 508 1524 2032 2540 3048 4064 5080 1000
22" 559 1677 2236 2795 3354 4472 5590 1000
24" 610 1830 2440 3050 3660 4880 6100 1000
26" 660 1980 2640 3300 3960 5280 6600 1D (Outside
diameter of
as per Buyer
28" 711 2133 2844 3555 4266 5688 7110
30" 762 2286 3048 3810 4572 6096 7620
32" 813 2439 3252 4065 4878 6504 8130
34" 864 2592 3456 4320 5184 6912 8640
36" 914 2742 3656 4570 5484 7312 9140
38" 965 2895 3860 4825 5790 7720 9650
40" 1016 3048 4064 5080 6096 8128 10160
42" 1067 3201 4268 5335 6402 8536 10670
44" 1118 3354 4472 5590 6708 8944 11180
46" 1168 3504 4672 5840 7008 9344 11680
48" 1219 3657 4876 6095 7314 9752 12190
50" 1270 3810 5080 6350 7620 10160 12700
52" 1321 3963 5284 6605 7926 10568 13210
54" 1372 4116 5488 6860 8232 10976 13720
56" 1422 4266 5688 7110 8532 11376 14220


ASME B16.49-2001 Factory-Made Wrought Steel Buttwelding Induction Bends for Transportation and Distribution Systems
EN 14870-1:2004, Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 1: Induction bends (ISO 15590-1:2001 modified).
ISO 15590-1 - Petroleum and Natural Gas Industries - Pipeline Transportation Systems - Part 1 - Induction Bends
ASME B16.9– Factory-Made Wrought Butt-welding Fittings
ASTM A-860 – Standard Specification for Wrought High Strength Low-alloy Steel Butt-Welding Fittings
MSS SP-75  -Specification for High-Test Wrought, Butt-Welding Fitting
CSA Z245.11-05 - Steel Fittings

DNV OS-F101 - Submarine Pipeline Systems - 2000

DEP Linepipe induction bends (amendments/supplements to ISO 15590-1)  
ABNT 15273 Petroleum and Natural Gas industries - induction Bends tor Pipeline Transportation Systems(Brazilian standard on induction bending for the oil and gas industries)
ABNT NBR 15273 – Indústrias de petróleo e gás natural – Curvas por indução para sistema de transporte por dutos
TPA-IBS-98 Recommended Standards for Induction Bending of Pipe and Tube by the Tube and Pipe
TOTAL GS EP PLR 221  Fabrication of hot bends for pipelines (sweet service)
PFI ES-24 - Pipe Bending Methods, Tolerances, Processes and Material Requirements 

Carbon and Alloy steel 

For Moderate and elevated Temperatures
ASTM/ASME A234: WPB, WPC, WP1, WP11, WP12, WP5, WP22, WP9, WP91
EN 10216-2: P195GH, P235GH, P265GH, 20MnNb6, 16Mo3, 8MoB5-4, 14MoV63, 10CrMo5-5, 13CrMo4-5, 10CrMo9-10, 15NiCuMoNb5-6-4, X11CrMo5, X11CrMo9-1, X10CrMoVNb9-1, X10CrWMoVNb9-2, X20CrMoV11-1
RCCM: CL2-CL3-NC, grades: P265GH, P280GH, P295GH, P355NH, TU42C, AE250B1
High Yield Steel for pipe line and offshore
ASTM A860/MSS SP-75: WPHY 42, WPHY 46, WPHY 52, WPHY60, WPHY 65, WPHY 70 grades, WPHY80
EN 10208-2: L245NB, L290NB, L360NB, L415NB, L360QB, L415QB, L450QB, L485QB, L555QB, L360MB, L415MB, L450MB, L485MB
API 5L: Gr.B,X42, X46, X52, X60, X65, X70,X80

For Low Temperature service

Stainless steel

ASTM/ASME A/SA403: WP304 (L) (H) (LN) (N), WP321 (H), WP316 (L) (H) (LN) (N), WP347 (H), WP317 (L), WPS31254
RCCM: CL1-CL2-CL3, Grades: Z2CND17.12, Z2CN18.10, Z2CND18.12N
ASTM A774: TP304L, TP316L, TP317L, TP321, TP347
Equivalent grades of EN 10253-3, EN 10253-4 (former AFNOR-DIN-BS equivalent grades)

ASTM/ASME A/SA 815 UNS 31803 (Duplex), UNS 32750 (Duplex),UNS 32760 (Duplex), UNS 32550 (Superduplex)

Non ferrous alloys
Nickel Alloy

ASTM/ASME BSB 366: UNS N04400, UNS N06600, UNS N06625, UNS N08020, UNS N08800, UNS N08811, UNS N08825,UNS N10276
Aluminium Alloy
ASTM B361: 3003 and 6061 grades

Specifications︰ Induction Bending is a controlled means of bending pipes through the application of local heating using high frequency induced electrical power. to create a narrow, circumferential, heated band around the material to be bent. When the appropriate temperature is reached, the material is pushed forward through the coil at a consistent speed and temperature while a bending moment is applied. After the material passes through the coil, it may be cooled (quenched) by forced air or water spray, or it may be allowed to cool naturally at ambient temperatures.

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

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 equipment for their induction bending.

Our Bending is capable of providing the following tests and more.

X-Ray, Heat Treatment, Stress Relieve, Liquid Penetrate Testing, Brinel Hardness Testing, Magniflux Testing, Ultra-Sonic Testing, Magnetic Particle Testing, PMI (Positive Material Identification), Elemental Analyzer, Hydro Test.

Destructive Mechanical Testing
Testing can be carried out to American e.g. ASTM & API, European e.g. BS EN & DIN and to individual client standards e.g. Shell DEP, DNV OS F101 & BP GIS 43 – 317 amongst others
We are happy to make arrangements for witnessing of testing by statutory inspection bodies (e.g. Lloyds Register, Det Norske Veritas and Bureau Veritas) as well as by clients and client representatives, ensuring that transparency & confidentiality is always maintained
Under our ILAC/CNAS Accreditation the following tests can be carried out
 Tensile testing (ASTM and BS EN)
 Impact testing (ASTM, BS EN & IZOD) from ambient to – 196° C
 Hardness Testing (Vickers and Brinell)
 Corrosion tests on Duplex and Stainless steels to ASTM G48 – A
 Macro and Micro examinations of metallic materials (Including both photo macro & micrographs)
 Determination of percentage ferrite to ASTM E562
 Weld testing (complemented by our NDE availability)
We have close links with several other ILAC accredited laboratories and as such can sub-contract testing outside of our accreditation e.g. elevated temperature tensile testing, chemical analysis, HIC and SSCC corrosion tests etc.

Non Destructive Examination
To ensure compliance with specification, many of our bends undergo non-destructive testing. This can be as simple as a basic minimum wall thickness check or can involve a series of surveys using various means of fault detection.

We provides an in-house service through highly experienced operators based within our site and qualified to ASNT / PCN Level II (with procedures externally approved to Level III). This arrangement allows the flexibility we need to ensure our process is as efficient as possible.

Our available range of in – house NDE comprises;

■Magnetic particle inspection – standard format
■Magnetic particle inspection – fluorescent format
■Liquid penetrant inspection
■UT wall thickness survey
■UT straight beam lamination survey
■UT shearwave survey
■UT longitudinal seam weld survey
■Surface hardness survey
Post Bend Heat Treatment

A feature of induction bending pipework is that due to the heat input allied to the stresses formed during process, mechanical properties may be altered – sometimes significantly.

The majority of materials we bend, particularly high yield carbon & duplex type steels etc. require a full body furnace heat treatment after bending in order to either restore or, as is often the case, enhance mechanical properties. Through our local sub contractor we are able to offer a variety of heat treatments including the following;

Usually applied to carbon steels such as ASTM A106 Gr. B, A333 Gr. 6 & API 5L X52, this process includes a set time at temperature with a still air cool to ambient outside the furnace atmosphere

Normalise & Temper
Commonly associated with materials containing a higher level of chrome e.g. ASTM A335 P11 & P22 etc. Once complete, the normalise process (as above) is followed by tempering for an extended time at a lesser temperature, again with a still air cool to ambient

Quench & Temper
Intended for high yield materials e.g. API 5L X65, the material is held for a time at temperature then rapidly quenched in a cooling medium to provide a hardening action. Once complete, the quench is followed by tempering at a lesser temperature, this time with a still air cool to ambient

Solution Anneal
Applied to stainless & duplex steels such as UNS S31803 & UNS S32760, the material is held at an elevated temperature for the required time before rapid cooling in either air or water. No secondary heat treatment is usually required with this process.

Workmanship is initiated at every level. Every piece is examined and cross-examined. Non-destructive testing plays an important role in maintaining high quality. According to our customers bending specification, MIL is capable of providing the following tests and more.
X-Ray, Heat Treatment, Stress Relieve, Liquid Penetrate Testing, Brinel Hardness Testing, Magniflux Testing, Ultra-Sonic Testing, Magnetic Particle Testing, PMI (Positive Material Identification), Elemental Analyzer, Hydro Test

Our bends are widely applied on several industries including, however not limited to:

Heating and Cooling
Food processing
Pneumatic Conveying
Power Piping
DOT (Department of Transportation)
Pulp and Paper
Ship Building
Ship and Barge

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