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Special Report Special Report

(He Std). Sniff test can fi nd very small safety risk/hazards involved in the analysis in water distribution net- 12. Nondestructive Testing Handbook,
leaks, identifi es the exact location and plant. works. Control Engineering Prac- Volume 6 “Acoustic Emission Test-
ing”, Third Edition, American Society
can be used to determine the leak fl ow Target Your Market More Effectively
tice, 19 (10), 1157-1167.
rate. Radioisotope method is extremely REFERENCES 7. Hydrostatic Pressure Testing, of Nondestructive Testing (ASNT).
accurate, butrequires special train- 1. Collacot R.A, Mechanical Fault Pressure Vessel Design and Engi- 13. Ahmad, S., Ahmad,Z., Kim, C.H.,
IndiaChemTrade
ChemImpex
ing for operators. It requires selection Diagnosis, (1977) Chapman and neering, American Society of Kim, J.M., “A method for pipeline
of right type of radioisotopes and use Hall, Ltd., London. Mechanical Engineers (ASME), leak detection based on Acoustic
For subscribers only
Emission & deep learning, Multi-
of radiation (specially λ-Ray) detec- 2. Neale Michael, A Guide to Con- Section – VIII. Free for subscribers of Chemical Weekly
tion device and is relatively expen- ChemImpex, the trade database, tracks, on a daily IndiaChemTrade provides consolidated trade statistics
dition Monitoring of Machinery, 8. Acoustic Emission Examination of
disciplinary Digital Publication
Institute (MDPI), (Feb. 2022), Basel,
Fiber-Reinforced Plastic Vessels,
Department of Industry (1979),
sive. Dye penetrant test is very simple basis, exports and imports of chemicals and related of India. The information provided here is based on the
and inexpensive, but is not accurate Her Majesty’s Stationery Offi ce, Article 11, Subsection A, Sec- Switzerland.
London.
tion V, Boiler and Pressure Vessel 14. Prabhu, V., Vairaval, K.S., Velnath,
Fig. 20 :Thermogram of a HP steam pipe showing Leakage & Insulation damage in a super for very small leakages. Ultrasonic products through the major ports in India — a vital annual trade data published by the Directorate General
of Commercial Intelligence and Statistics, Government
source of commercial intelligence. Find out on-line
thermal power plant leak testing is performed based on the 3. N. Hilleret, “Leak detection”, Edit- Code, American Society of Mecha- R., “Leak Detection in high pres-
nical Engineers.
principle that sound waves (ultrasonic how international markets are moving; where your of India. The database can be searched by: Chemical
sure vessels using non-intrusive
ed by S. Turner, Proc. CAS Vacuum
frequency range) transmit through the competitors are exporting and at what price; where Name/Harmonised Code to obtain the consolidated
I.O.P.
methods”,
Technology, Snekersten, 1999, 9. Acoustic Emission Examination of
Conference
leakage point of the pressure vessel. It CERN 99/05 (CERN, Geneva, Metallic Vessels During Pressure Series: Material Science and Engi-
Testing, Article 12, Subsection
1999), p. 203.
uses an ultrasonic gadget/equipment imports are coming from and how their prices are trade (import or export) in that item; or by Country to
neering, (2021), 1069012015.
moving. Download all this data,
A, Section V, Boiler and Pressure 15. Kaplan Herbert., ASNT Level-III
to locate leakage point and size, but 4. Murvay, P.S. and Silea, I., 2012. A seamlessly, for a obtain the trade (import or export) in all chemicals and
is usually unable to measure the leak- small fee — online, anytime, with no hassles. related products between India and that country
Vessel Code, American Society of
survey on gas leak detection and
Study Guide on Infrared and Ther-
age fl ow rate. Acoustic emission test- localization techniques. Journal Mechanical Engineers. mal Testing Method (2001), The
ChemXchange
ing and IR thermography scanning are of LossPrevention in the Process 10. Standard Practice for Leak De- American Society of Non-destruc-
highly advanced and very expensive Industries, 25 (6), 966-973. tection and Location Using Sur- tive Testing, Inc.
Open to all registered users — no subscription required
techniques. Both the techniques are 5. Colombo, A.F., Lee, P. and Karney, face-Mounted Acoustic Emission 16. Chakravorty S.K., Thermography
of Power Systems-Case Studies,
B.W., 2009. A selective literature
Sensors, American Society of
on-line in nature and require skilled ChemXchange — the chemical exchange with a difference — is where you can identify your buyers and sup-
Insulation damage
(2007), Seminar Proceedings on
review of transient-based leak
Heat leakage in a steam installation due and trained operators. They are very plyers on-line, any time. This unique platform is free to all advertisers in the print version of Chemical Weekly.
Mechanical Engineers: Standard –
to insuffi cient insulation. precise and give very high lead-time detection methods. Journal of E1211-97. Machinery Health Management,
For more information contact: 022-24044477. Fax: 022-24044450
between detection of likely leak and Hydro-environment Research, 2(4), 11. Non-Destructive Testing – Acous- Federation of Indian Chambers of
the actual leak taking place in a pres- 212-227. Email: corporate@chemicalweekly.com or log on to chemicalweekly.com
Commerce & Industry, New Delhi.
tic Emission – Examination of
sure vessel. AE testing is based on 6. Pérez, R., Puig, V., Pascual, J., Que- Metallic Pressure Equipment during 17. Thermal Imaging Guidebook for
the principle that very high frequen- vedo, J., Landeros, E. and Peralta, Proof Testing; Planar Location of Industrial Applications, (2011),
cy acoustic waves are generated and A., 2011. Methodology for leakage AE Sources, European Committee Infrared Training Centre, FLIR
radiated from metals undergoing defor- isolation using pressure sensitivity of Standardization, DIN EN 14584. Systems AB, USA.
mation and fracture process, which
is measured by special transducers
mounted on different locations of the
vulnerable areas of the pressure ves-
Fig. 21: Thermograms showing steam leakage from different pressure vessels sels such as welded joints and bends,
etc. IR thermography is based on
417.4 detection of IR energy radiated by an
378.9 object using a semiconductor detector,
340.3 a set of lenses and grater, and electronic
301.8 circuit producing a thermal image
263.3 of the object. IR scanning is a non-
224.8 intrusive and non-contact mapping of
186.2 thermal images of the surface and is
147.7 very rapid facilitating easy interpreta-
109.2 tion. Both techniques discover the root
70.6 cause of the leakage/defect in the pres-
32.1 sure vessels and are preferred methods Mrs. Usha S. - usha@hpicindia.com
o F for very critical pressure vessels from
Fig. 22: Leakage of process gas due to lining defect in an oil refi nery catalytic converter the view point of downtime losses and
212 Chemical Weekly September 26, 2023 Chemical Weekly September 26, 2023 213
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