Posts Tagged ‘welding’

48″ Gas Pipeline Internal Clamp.

               Routine Maintenance On The Internal Clamp

The internal clamp used in the front end welding operations is inspected regularly and any adjustments required are made at this time. Generally all that’s required is a clean up using compressed air to get rid of the welding dust. The copper backing shoes are then inspected and replaced where necessary.

This picture shows the internal copper backing shoes used in the PASO welding process. The aluminium band on the outside of the pipe is the track to which the external welding bugs are attached. The clamp has a long handle which is inserted into the next pipe to be welded and is controlled by compressed air. Once the welding is complete, the handle which protrudes from the the open end is used to release the clamp and to activate the pneumatic motor which sends it up to the next joint to be welded.

   SideWallFusion

Recommended reference books on pipeline construction at amazon.com

Welding:
Pipe Welding Procedures
The Pipe Fitter’s and Pipe Welder’s Handbook, Revised Edition
Pipefitters Handbook
Pipe Fitter’s Math Guide
Audel Pipefitter’s and Welder’s Pocket Manual
Audel Welding Pocket Reference (Audel Technical Trades Series)
Oil & Gas Pipelines in Nontechnical Language
Pipeline Rules of Thumb Handbook, 7th Edition

Pipeline Corrosion Control:
Pipeline Corrosion and Cathodic Protection, Third Edition

Excavations:
Excavation & Grading Handbook
Estimating Excavation
Excavation Systems Planning, Design, and Safety

A Picture Of Pipeline Construction Oman.

                     A tie-in on the Sur 48″ diameter gas pipeline, 1998.

48" diameter pipeline.

The picture above I took with a pre-digital Canon Ixus. I found it handy, around the size of a cigarette pack, slipped into the top pocket of my overalls no probs. I was so impressed with it I bought a Canon digital Ixus 6 a 6 mega pixel mini camera which I use constantly, for such a small camera it works marvels. Anyway back to the topic of this post, the tie-in. In pipeline construction the pipes are strung out along the trench and are welded up by what we call the front end welding crews. At road crossings and difficult areas they leave gaps for the tie-in crews to weld at a later time.

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