| Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise


Download our free eResource: Safety in Coatings Work.

Problem Solving Forum

| More

August 11 - August 15, 2014

What is the maximum number of holidays that should be permitted for linings in immersion service, and why?

More items for Quality Control

Selected Answers

Not even a single holiday or pinhole can be allowed in an immersion coating because, surely, it will be a cause of severe coating failure.

From Jimmie Meeks of McDaniels on August 21, 2014:
While I appreciate the answers from each person, what part of immersion service was not understood. Holidays or pinholes are not acceptable on any coating job, immersed or not, that I am aware of.

From Robert Ferguson of Greenmane -Pedersen,INC on August 20, 2014:

From Shane Gannon of Northern Metal Fab on August 15, 2014:
Zero holidays are allowed for immersion linings. Sponge wiping the coated surfaces with a low voltage holiday tester works great for detecting holidays when the lining is 20 mils or less. High voltage testing can be used on linings thicker than 20 mils.

From Daniel Liu of APC on August 13, 2014:
No holiday can be permitted for immersion areas.

From Navin Kothari of Kotech (QLD) Pty Ltd on August 12, 2014:
Having no holidays means completely free from pinholes of any dimensions.

From Simon Hope of Bilfinger Salamis on August 12, 2014:
Immersion systems are designed to be pinhole- and holiday-free, hence, the need to undertake suitable holiday detection. Any such defect negates the whole purpose of the lining and the classic 'if you can't see it, it doesn't really matter' attitude is what leads to premature failure of so many systems. Proper quality control, rigorously upheld, can save a fortune in the long run.

From Navin Kothari of Kotech (QLD) Pty Ltd on August 11, 2014:
No holidays are permitted.

From Steve Brunner of WPC Technologies on August 5, 2014:
Linings for immersion service should be pinhole-free, meaning zero pinholes. This is a relative easy task when applicators follow coating manufacturers' instructions.

From Billy Russell of D&R COATING INSPECTION on August 2, 2014:
Zero holidays should be permitted for linings in immersion service.

From Per Gabrielsson of Free Lance Consultations and Inspections on July 31, 2014:
Not only holidays are detrimental.  Also, overthicknesses are to be avoided, as they will lead to solvent traps and intercoat crackings. Always specify minimum and maximum. dft's And do not always believe in what some of the paint manufacturers accept, that 2 x minimum on critical areas and 3 x minimum on non-critical areas would be safe.

From Freeborn Enuvwaria of A coating inspector on July 30, 2014:
Not even one holiday should be permitted, because it will cause a severe coating failure in the near future.

Please sign in to submit your answer this question    

Tagged categories: Holidays; Immersion service; Linings

Current PSF Question | Submit a PSF Question | Full PSF Archive

Elcometer, Inc.
New Elcometer 456 Coating Thickness Gauge

Best In Class Just Got Better. Technologically Intelligent And Robust. Marvelous Design And Durability. An Earth-Shattering Revolution In Coating Inspection.

HoldTight Solutions Inc.

Our HoldTight®102 salt remover & flash rust preventer prevents flash
rust by removing surface contaminants. It has no equal; only wannabees.
Contact us for your
nearest distributor.
(800) 319.8802

KTA-Tator, Inc. - Corporate Office
KTA-Tator EH&S Services

• Ambient & Worker Exposure Air Monitoring
• Safety & Health Program Development
• Lead Paint Assessments
& Specifications
• Health Hazard & Jobsite Safety Assessments
Call 1-800-245-6379

Graco Inc.
Graco Mortar Pump

The M680 sprays epoxy-based mortars, anti-skid coatings, cementitious and filled materials. Compact.
Easy to use.
Call 877-844-7226 or

Fischer Technology Inc.
Measure TSA Coatings on Stainless Steel

The PHASCOPE® PMP10 from FISCHER precisely measures thermally sprayed aluminum (TSA) on stainless steel.

Carboline Company
Fireproofing Solutions

Pyroclad® X1 Thermo-Lag® Pyrocrete® – protecting against hydrocarbon and jet fires, explosions, and cryogenic spills.

AW Chesterton
ARC Protective Coatings

perform reliably under the most demanding exposures in the toughest process conditions. Use our Coating Selector Tool for your application needs at

DeFelsko Corporation
PosiTest Automatic Adhesion Tester

Electronically controlled hydraulic pump applies smooth and continuous pull-off pressure at user selectable rates. No twisting, pumping or cranking.

Sidewinder/Persyst Enterprises, Inc.
The Sidewinder Model M2 Solvent Recycler

Combat the rising cost of gunwash, thinners, acetone & more while drastically reducing waste disposal coat.

Dampney Co., Inc.
High Temperature White Paint

New Coating with not yellow, remains white and will withstand temperatures up to 1,200ºF

Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker

EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us

© Copyright 2000-2015, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail