NSF 61, Before applying internal cement lining or after ? 3

[sowhatso]

For the welded steel pipes and the galvanized steel pipes that will be used for potable water applications , the WS pipes will have internal cement lining , I know that the internal cement lining that will be in contact with potable water shall have NSF61 approval and satisfy current applicable government health and safety requirements. BUT shall the steel pipes BEFORE applying the cement lining, I mean the chemical composition of steel, does it need to match the NSF61??
I have the datasheets for one of the pipe manufacturer and it said that a component has been identified as a cancer hazard; the material contains chemicals known to the country to cause cancer or reproductive toxicity. According to OSHA, the material is considered to be non hazardous, however, dust and fumes from this product may be hazardous.
Your inputs are highly appreciated .

 

[BigInch]

What pipe? What hazardous material? What concentration of the hazardous material is present in the pipe?

**********************
"Pumping accounts for 20% of the world’s energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies)

http://virtualpipeline.spaces.live.com/

 

[sowhatso]

My question is so simple, and it is in general for any Welded steel pipe with cement lining that will be used for potable water application: I need to know if NSF 61 standard is only applied to the internal cement lining or it should be applied to the steel pipe chemical composition after fabricating the pipes and before applying the cement lining ??

 

[patprimmer]

If you weld galvanised iron, the fumes generated are toxic.

There is still nowhere near enough information for anyone to offer a good answer and most here are not prepared to play 20 questions with you just to extract the question you should have asked in the first place.

My advice is that if you are severely lacking in data, at least declare that so we know you have done your best to ask a good question rather than just being lazy and flicking your problem and your work onto others.

Regards
Pat
See FAQ731-376 for tips on use of eng-tips by professional engineers &

http://eng-tips.com/market.cfm

for site rules

 

[waross]

"Is the datasheet for plain steel pipe or galvanized pipe?"

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[rconner]

It appears you may be looking for some sort of relationship between Material Safety Data Sheets (MSDS’s) that may be shipped with the products, and somehow contrasting that with “NSF 61 listing” of materials for “contact” with potable water. It is my understanding these are some technically different regulatory requirements. I believe an MSDS primarily reflects the hazards of shipping/handling and working with the material in a sort of occupational fashion. It appears these are not really meant as much for consumers” etc. as are NSF 61 listings.

NSF 61 listing/certification/approval (or whatever you want to call it) is on the other hand for “minimum health effects requirements for materials, components, products, or systems that contact drinking water…” as explained at

http://www.nsf.org/business/water_distribution/standard61_overview.asp?program=WaterDistributionSys

(with specific detailed protocols, exposures, testing etc. used explained elsewhere in the basic NSF portal).

That being said, I guess there could arguably be some overlaps regarding actual applications with some materials in some service exposures.

While I understand there is perhaps lesser potable water usage now of galvanized pipes at least in the USA than other types of pipes, it appears that at least a few galvanized tank and piping item manufacturers that have some NSF 61 listed products for at least some specific exposure etc. conditions.

 

[unclesyd]

rconner,
Galvanized pipe fell out of fervor for a lot of reasons, cost and availability, skill labor and the big bugaboo lead in the galvanize. Running a HDG bath without lead is big and expensive chore.
A few years back our site installed a very long galvanized line for breathing air and while the environmental group was doing their testing up popped three PPM lead, end of line.
And just think when I was co-oping with a fitting company part of my job was to check the kitchen and bath cadmium plating baths.