http://rapidshare.com/files/48022806...ping.Guide.zip
the piping guide for design and drafting industrial systems

http://rapidshare.com/files/63830891...0898678897.rar
piping handbooks

http://rapidshare.com/files/6937430/...ing_Design.rar
process plant layout piping design

http://rapidshare.com/files/2335530/...Mw_Kellogg.pdf
design piping systems kellogg

http://rapidshare.com/files/36330951...0914082191.rar
the piping guide for design and drafting industrial systems