×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

double random joint pipe
3

double random joint pipe

double random joint pipe

(OP)
Hi

would you please describe, what is "double random joint pipe"

thanks

RE: double random joint pipe

Pipe is sold in random lengths to avoid massive waste and scrap. They start with a block of iron sized to create a piece of pipe 16 feet long. After the pipe is rolled, it might be 15.5 feet or 17 feet long. They sell it at whatever length it is. If they insisted that every piece was exactly 16 feet, they would have to start with more iron to be sure the pipe was at least 16 feet long. Then they would have to cut off the excess and scrap it. Very wasteful.

So pipe is sold in random length (about 16 feet) or double random length (about 32 feet). You pay for the actual length of the pipe you receive. I might order 700 feet of 1 inch pipe in double random lengths. I get exactly 700 feet of pipe and I pay for 700 feet of pipe. But the individual pieces of pipe are not exactly 32 feet long.

Johnny Pellin

RE: double random joint pipe

This is the table in API 5L.

So varies for say a nominal 12m / 40ft pipe can be 14 ft to 45 ft(!!) with average 35 ft.

In pipeline terms double random normally mean a "nominal" 12m / 40ft long pipe plus or minus 2 - 3 ft. Single random is 6m / 20ft. Other industries may use a different accepted nominal length.

You usually find pipe specifications or the data sheet restricts the range to something more like 36 ft to 42 ft with average not less than 39ft.

Sometime there is a strict maximum if you want it to be transported on e.g. railcars or inside a container.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: double random joint pipe

Double Random Length pipe has any random size in the middle 11-13 meters. While pipes above 2 inches in diameter are possible in DRL size. Custom sizes are used to save welding price at the installation site.

RE: double random joint pipe

Single random pipe length is usually 18 - 25 feet plain end or 18 - 22 feet threaded and coupled pipes.

The term “random” refers to the fact that the pipe mill sets the pipe length between a min-max value, but cannot control the exact length of every single pipe. A double random length pipe has an expected length twice the length of an SRL pipe.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close