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Anonymous Poster

Coal Tar

01/20/2011 9:39 AM

Good day to all forumers


I am currently working on the design of a pipeline. Until now the preselection submitted coating gives the option resulting COAL TAR, basically by economic.


According to what I read, many experts object to this type of coating based on technical reasons and health. I wish someone help me telling me where I can get information about the health implications of using this type of investment and technical standards to complement the information I have.


Thank you very much everyone for your comments.

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Whitephone
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#1

Re: Coal Tar

01/20/2011 11:16 AM

See this VECOM Technical Bulletin:

It is incomprehensible that Japanese Black is still being used as a preservative on steel pipe sections, and particularly on fittings. This preservative, which is very difficult to remove, has many names: Japanese Black, Japanese Varnish, Coal tar, Brunswick Black, Black Coating etc. Its precise composition varies greatly, but is always based on bitumen, a final distillate of crude oil.

As mentioned above, Japanese Black is used as a preservative on steel welding flanges, T-pieces, welding sockets, reducers and various types of welding bends.

This agent is an excellent, inexpensive preservative, but it is inert and its use extremely hazardous in technology. The presence of Japanese Black in new construction projects in both industry and ship-building has already caused a large number of financial setbacks, sometimes exceeding a million euros.
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TonyS
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#2

Re: Coal Tar

01/21/2011 9:35 PM

Over the years I must have specified many items to be "Japaned" but I never knew where the name came from. Thanks!

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