Magnetic particle Inspection services in chennai (MPI) is a non-destructive testing (NDT) process for detecting surface and slightly subsurface discontinuities in ferromagnetic materials such as iron, nickel, cobalt, and some of their alloys. The process puts a magnetic field into the part. The piece can be magnetized by direct or indirect magnetization. Direct magnetization occurs when the electric current is passed through the test object and a magnetic field is formed in the material. Indirect magnetization occurs when no electric current is passed through the test object, but a magnetic field is applied from an outside source. The magnetic lines of force are perpendicular to the direction of the electric current which may be either alternating current (AC) or some form of direct current (DC) (rectified AC).
A technician performs MPI on a pipeline to check for stress corrosion cracking using what is known as the "black and white" method. No indications of cracking appear in this picture; the only marks are the 'footprints' of the magnetic yoke and drip marks.
A close-up of the surface of a (different) pipeline showing indications of stress corrosion cracking (two clusters of small black lines) revealed by magnetic particle inspection. Cracks which would normally have been invisible are detectable due to the magnetic particles clustering at the crack openings. The scale at the bottom is numbered in centimeters.
The presence of a surface or subsurface discontinuity in the material allows the magnetic flux to leak, since air cannot support as much magnetic field per unit volume as metals. Ferrous iron particles are then applied to the part. The particles may be dry or in a wet suspension. If an area of flux leakage is present, the particles will be attracted to this area. The particles will build up at the area of leakage and form what is known as an indication. The indication can then be evaluated to determine what it is, what may have caused it, and what action should be taken, if any.
A popular name for magnetic particle inspection is or used to be magna fluxing; The twg group was one of the early manufacturers of equipment and materials for the process.
FOR MORE DETAILS :
Cell : 93810 77677 / 76679 78887
Email : twggroupchennai@gmail.com
CONTACT ADDRESS :
CHENNAI BRANCH
no.5, boopathy street, virugambakkam,
virugambakkam - bus stop opposite chennai , tamil nadu , india.
tel: 044 - 420 77677, 044 - 430 72173
cell : 093845 77677
email : twggroupchennai@gmail.com
KOCHI BRANCH
Near LULU Shopping Mall
Edappally Toll Junction,
Opposite - Metro Bridge Piller No. 387,
V.P Marakkar Building,
V.P Marakkar Road,
Via - Vanitha and Vinitha Theatre
Edappally P.O, Kochi - Kerala
Contact :073580 27788 , 093810 48884,
Email : twggroupcochin@gmail.com ,
Email : twggroupchennai@gmail.com
MUMBAI BRANCH
crescent business square" No.810, kherani road,
opposite - sj studios sakinaka metro
junction, andheri (east) mumbai - 400 059.
cell : 093810 48884, 073580 27788, 093810 77677
email : twggroupmumbai@gmail.com
email : twggroupchennai@gmail.com
TRICHY BRANCH
sri gem plaza no.3, 4th floor,
sankaran pillai street, s.r.c.college road,
chathiram bus stand, trichy - 620 002
Tamil nadu , india.
contact : jenifer : 093845 77677, 93810 77677
contact : suganya : 093825 88890
email : twggroupchennai@gmail.com
COIMBATORE BRANCH
dheepam complex no.574 to 581, 100 feet road,
near g.p.signal, landmark: kalyan jewellery,
gandhipuram, coimbatore - 641 012 tamil nadu , india.
contact : jasmine : 093810 77677, 093845 77677,
contact : sandhiya : 093825 88890
email : twggroupchennai@gmail.com
VIZAG BRANCH
twg group vizag no. 8 - 12 - 1/1,
2nd floor, gayathri nilay, gokul nagar,
karur vysya bank back side opposite - holy cross church,
old gajuwaka junction, vishakapatnam - 530 026.
Andhra pradesh , india.
contact : 073580 27788, 093810 48884, 76692 48884.
email : twggroupchennai@gmail.com
BANGALORE BRANCH
No.54, 15th Main Road ,
2nd Floor,
East of Chord Road
Vijaya Nagar,
Opposite Vijaya Nagar Metro Station,
Bangalore - 560 040.
Karnataka, India.
Contact : 073580 27788 , 093810 77677
Email : twggroupchennai@gmail.com
HYDERABAD BRANCH
twg group hyderabad contact : shopia : 076679 78887 contact : office : 093810 48884
email : twggroupchennai@gmail.com
DELHI BRANCH
twg group delhi contact : shopia : 076679 78887 contact : office : 093810 48884
email : twggroupchennai@gmail.com
PUNE BRANCH
twg group pune contact : shopia : 076679 78887 contact : office : 093810 48884
email : twggroupchennai@gmail.com
TRIVANDRUM BRANCH
twg group trivandrum contact : shopia : 076679 78887 contact : office : 093810 48884
email : twggroupchennai@gmail.com
CALICUT BRANCH
twg group calicut contact : shopia : 076679 78887 contact : office : 093810 48884
email : twggroupchennai@gmail.com
