Steel Pipe laying
Steel Pipe laying
(OP)
Is it proper method to lay steel pipes (500mm dia. x 9m long) by pre-fitting up every 2 pipes at ground level then lift and place into pipe trench then full weld. What are advantages and disdavantages. Any opinion would be very much appreciated.
Is laying 1 pipe at a time better than 2 pipes.?
Is laying 1 pipe at a time better than 2 pipes.?





RE: Steel Pipe laying
Having one ditch open is best. If you open a ditch and lay two lines in it your lay costs will be somewhere around 75% the cost of digging two ditches and laying the same pipes.
David
RE: Steel Pipe laying
(Copyrights: Virtualpipeline)
**********************
"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/
RE: Steel Pipe laying
David
RE: Steel Pipe laying
But that's right, for sure you can't open cut everything. Some push crossings will have to be made somewhere, and you wouldn't want to slow down the main lay with crossings. You can reserve those couple joint welds for the speciality crossing crews, then let a tie-in crew come in and weld them into the main line which has probably passed them up and is long gone by then.
**********************
"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/
RE: Steel Pipe laying
RE: Steel Pipe laying
However, you are posting in the water forum. Steel piping is not used extensively for water piping. And most of the water piping in underground applications is installed with flexible push-on joints.
Is your project a water pipeline?
RE: Steel Pipe laying
RE: Steel Pipe laying
RE: Steel Pipe laying
Steel pipe and reinforced concrete pipe are sometimes used as large feeder mains in water distribution applications.
RE: Steel Pipe laying
We have another issue on lining of weld joints inside pipe as the contr proposed manual application of epoxy lining, meaning worker have to go inside the 500mm dia pipe which we consider unsafe. Any opinion on this?
RE: Steel Pipe laying
RE: Steel Pipe laying
which country are you in? I am sure that in Europe and North America 500mm diameter is not considered "man entry". There must also be fume issues.
RE: Steel Pipe laying
The coating applicators use automated equipment that will do surface preparation and apply coatings to field joints without the need for entry. The type of automated equipment depends on the selected coating.
You should request additional information from the Contractor on the coating application.
RE: Steel Pipe laying
RE: Steel Pipe laying
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Steel Pipe laying
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04