Fabrication of Steel Sleeves to repair gas pipe lines

[09091960]

I'm looking for a pipe repair method by using fabricated steel sleeves specially use in buried gas pipe lines.(Corroded areas of pipe use to repair by having sleeves made of from the material similar to the strength of the original piping material)
Currently for repairs we use spare pipes of the same grade (dia 22'' - API 5L X52) as original pipes. This method is not very successful in terms of fit up is concern as we need a diameter slightly bigger than 22'' to achieve the good fit up. To achieve the better quality of the repair, as stated in the standards I need to roll the sleeves from the steel plate similar to the strength of API 5L X52 pipe.

Appreciate if someone could give me the procedure/ Method to Fabricate/ Roll steel sleeves by using steel plates.

 

[metengr]

You mean steel or metal pipe sleeves. See ASME Post Construction Code (PCC)-Article 2.6. There is a dedicated repair method for using fabricated pipe sleeves. The article is rather comprehensive and contains all of the information you would need to engineer this repair.

 

[jte]

As metengr pointed out, Article 2.6 in PCC-2 Repair of Pressure Equipment and Piping provides some good guidance for sleeves. Available for $95 at

http://catalog.asme.org/home.cfm?SEARCH=PCC-2&SearchWithin=1&Category=CS

in hard copy or pdf. Just a quick note that the 2008 ed is anticipated to hit the streets late Summer. I'm thinking early Fall... It will include several new articles and a few upgrades to existing ones.

I don't know what thickness you need, but for a 22" nominal pipe, a split 24" Sch 60 would give you a pretty good fitup. If you need thicker, I'd suggest talking to a pressure vessel fabricator about rolling a can for you.

jt

 

[PAN]

What is the original thickness of your pipe size 22 in.

The actual thickness of corroded pipe should be measured before welding.

 

[dcasto]

try this

http://www.plidco.com/public/index.php

 

Not sure if you are allowed to use composite materials or not.
one other way is

http://www.clockspring.com/index.htm

Gord

 

[KiwiMace]

Have you considered sliplining with PE? You lose internal diameter but the lower friction surface somewhat makes up for it.
I'm just throwing this out there, as I haven't done it myself.

 

[09091960]

Hi All,

Sorry for the late respond. I was away for a while. Many thanks for all the replies.
Actually we are using clock spring method as well but if you get a defect with more than 4M in length we found that steel sleeves are more economical. Therefore it’s better to have some fabricated steel sleeves in stock for larger repairs. Question on pipe thickness most of them are 7.9mm thick.