PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram
Search the site

 

Download our Free Top Contractors e-Resource Guide.

Problem Solving Forum

| More

May 2 - May 8, 2011

A specification requires Manufacturer X’s system “or equivalent.” What does “or equivalent” mean, and who decides what’s “equivalent?”

More items for Quality Control


Selected Answers

From Frank Rea of GPI-Southeast on May 3, 2011:
     Coatings or coatings systems can be evaluated for equivalence to a specified product by any or a combination of the following criteria: generic type of resin, chemical and phyical properties, service environment, required surface preparation, compatibility with existing coatings (if applicable), formula, or performance. The specifier should be the individual to determine whether a proposed alternative is "equivalent".

From Joseph Schinner of Akzo Nobel Coatings Inc. on May 2, 2011:

     I've dealt with federal, state, architectural, engineering, and general manufacturer's specifications for different types of coatings. It can be a mushball or it can be relatively simple. The detail of the spec itself determines how to approach the equivalent.

     The most common "equivalent" is a performance equivalent that may or may not spell out a generic binder type. If a binder is not identified, then you are free to use what you want to match the preformance, but it is always advisable to know what the competitor is using and why it seems to fulfill the requirements before deviating from his lead.

     If a spec asks for a 2K epoxy or a single package acrylic, then it doesn't want a performance equivalent in another generic binder system unless you can specifically sell them on value-added qualities that they will accept for their end use. It is best to find someone at the customer's facility who can answer questions about what application/field problems have been encountered and solved that are not directly addressed in the spec tests themselves. Often, this is where  "equivalents" can be a struggle until the "hidden specs" are solved. As examples, the specs may not address certain part-handling mar problems, or the finished structure may have temporary ponded water areas with no mention of immersion testing needed. Spec "equivalent" ranges all the way from a DOD spec that may specify coating formulas with specific binder/pigment/solvent types/ratios including exact hydrogen-amine ratios all the way to simple gross (e.g., anything that won't fall off the wall for 5 yrs. and still look white).

     Note: the more specific the formulation spec is, the more likely it was written around the competitor's or his predecessor's actual formula or submission, making it seem easier to match, but these are sometimes the hardest to overcome the "tricks" built in to prevent an easy match.

From Brian Chapman of Cadillac Fabrication on May 2, 2011:
     We generally take this to mean a coating that CLOSELY matches the spec in performance. The equivalent should be decided by the manufacturer's rep for the coating you want to use, based soley on performance characteristics.

Please sign in to submit your answer this question    

Tagged categories: Specification writing


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

Advertisements
 
Fischer Technology Inc.
 
MP0R with rotating display screen
 
Automatic rotating display screen just like your smart phone. Click for Video
Call 800-243-8417
 

 
KTA-Tator, Inc. - Corporate Office
 
KTA-Tator
Coatings Inspection
 
Any structure, any height, any place - A qualified coatings inspector is always available. Call 1-800-245-6379.
 

 
HoldTight Solutions Inc.
 
NO FLASH RUST - NO CONTAMINANTS
 
Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802 sales@holdtight.com
 

 
DeFelsko Corporation
 
PosiTector SHD Shore Hardness Durometer
 
PosiTector SHD measures the hardness of non-metallic materials. Features a measurement timer, auto ignore mode and internal memory. Shore A or D available.
 

 
Aggreko
 
Portable Heating Rentals
 
Aggreko offers stand alone or in-line industrial heaters, available for rental on your painting/coating project. 24/7 service, nationwide.
844-433-9802
 

 
SABRE Autonomous Solutions
 
Safety, Productivity, Quality. Robotic Blasting
 
Learn how this simple to use, field deployed, automatic robot is eliminating hazards in major confined, cluttered and complex surface preparation projects.
 

 
Atlantic Design, Inc.
 
ENGINEERING SOLUTIONS, NOT EXCUSES
 
See our website for features of our best seller, the ADI 3500CFM 4-Pot Blast Vacuum Recycler. A smaller package with all the ADI power you need. 866.Call.ADI
 

 
Safway Services
 
Safeguard Assets. Ensure Productivity. HAKI®
 
Protect assets and equipment. Keep facilities open and operational. Maintain schedules regardless of weather. Ensure smooth and continuous production. Easy to erect. Safway is the primary distributor of HAKI® products including HAKISPAN and HAKITEC® 750 – in North America.
 

 
NLB Corporation
 
NLB Sure Shroud: Greater Protection and Flexibility
 
NLB’s Sure Shroud’s lighter weight and flexibility reduces operator fatigue and offers unmatched protection against high pressure hose ruptures. 10k to 40k psi rated.
 

 
 
 

Technology Publishing Co., 2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings 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 PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us