BouzidLazhar
Mechanical
Does the pipeline manufacturing process have a min wall thickness limit to produce a seamless pipe?
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Max OD and Thikness of a seamless pipe. 3
- Thread starter BouzidLazhar
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1
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There are ID/OD oversize and undersize limits defined in the production specification (API 5L, etc.) which thereby also define the min and max thickness. Check your pipe production spec.
BigInch![[worm]](/data/assets/smilies/worm.gif "[worm] [worm]")
-born in the trenches.
BigInch
-born in the trenches.-
1
- #4
insult2injury
Mechanical
Yes, the manufacturer's have a requirement for the maximum ratio of OD to thickness. Cameron used 28:1 and V-M uses 25:1. Depending on the material and actual sizes, there are situations that they may be able to manufacture outside of these ratios, but that needs to be taken on a case-by-case basis with the manufacturer.
I2I
I2I
jte, I can see how you thought that. I don't know what he meant, however the absolute thinest wall would be a much thinner than any that would be useful for pressure containment of any kind, so I took the question to the other direction.
Thinking further now, if he's building a pipeline, the pipeline design codes limit Diameter to Wall Thicknesses ratios to about 100, so the thin limit in that case would be 0.01 x OD
BigInch-born in the trenches.
Thinking further now, if he's building a pipeline, the pipeline design codes limit Diameter to Wall Thicknesses ratios to about 100, so the thin limit in that case would be 0.01 x OD
BigInch
-born in the trenches.
insult2injury
Mechanical
Biginch:
Is that 100:1 for seamless pipe? or maybe plate pipe perhaps?
I2I
Is that 100:1 for seamless pipe? or maybe plate pipe perhaps?
I2I
Insult,
All pipe. I thought it was a code requirement, but now I can't find this in a code reference. It may be one of my "rule of thumb codes".
BigInch-born in the trenches.
All pipe. I thought it was a code requirement, but now I can't find this in a code reference. It may be one of my "rule of thumb codes".
BigInch
-born in the trenches.Perhaps its in API 5L, but it might be one of those "rule of thumb ""codes""?
BigInch-born in the trenches.
BigInch
-born in the trenches.-
1
- #10
GregLamberson
Petroleum
It is a rule of thumb, and a good one. Some company's will put it in their specs, some don't, all should. I was involved with laying some pipe once with a D/t of 112. It was a nightmare, with all of the buckled joints during cold field bending, buckled pipe during lowerin-in, the money the client "saved" in steel was eaten up and then some.
Anything in the 100+ range makes installation a bear.
Greg Lamberson
Consultant - Upstream Energy
Website:
Anything in the 100+ range makes installation a bear.
Greg Lamberson
Consultant - Upstream Energy
Website:
insult2injury
Mechanical
Who manufactures the seamless pipe with 100:1 ratio? In conversations I've had with Cameron and Vallourec-Mannesmann, the acceptable ratios are much lower. That piping is usually A335 or A106 for power applications, but I thought that it was requirement of the manufacturing process.
I2I
I2I
The Kaiser Rollmet Process produces D/t at a little over 100 with pretty good dimensions and finish.
- Thread starter
- #13
BouzidLazhar
Mechanical
We've request two different pipelines:
1- 16" x 0.374" pipe acc. to API 5L X60
2- 20" Sch STD Pipes acc. to ASTM A 53 Gr.B
The manufacture said that the wall thickness is TOO THIN for an execution as SEAMLESS Pipes.
According to API5L, the min Wall thickness for:
- Pipe 16"
is 0.188"
-Pipe 20 "
is 0.219"
that gives a ratio of about 91:1 which meets Biginch's response.
Referring to what all you folks have written previously, I understand that every manufacturer have his own ratio 28:1, 25:1 or maybe 100:1 which leads to say that we can get our above seamless pipe with another manufacture
1- 16" x 0.374" pipe acc. to API 5L X60
2- 20" Sch STD Pipes acc. to ASTM A 53 Gr.B
The manufacture said that the wall thickness is TOO THIN for an execution as SEAMLESS Pipes.
According to API5L, the min Wall thickness for:
- Pipe 16"
is 0.188"
-Pipe 20 "
is 0.219"
that gives a ratio of about 91:1 which meets Biginch's response.
Referring to what all you folks have written previously, I understand that every manufacturer have his own ratio 28:1, 25:1 or maybe 100:1 which leads to say that we can get our above seamless pipe with another manufacture
GregLamberson
Petroleum
I guess one question is - what is the driver for seamless? Will ERW or DSAW not meet the application?
Both pipes will be 0.375, it doesn't seem like an un-realistic request, I'd try another manufacturer.
Greg Lamberson
Consultant - Upstream Energy
Website:
Both pipes will be 0.375, it doesn't seem like an un-realistic request, I'd try another manufacturer.
Greg Lamberson
Consultant - Upstream Energy
Website:
From Metals International website,
BigInch-born in the trenches.
BigInch
-born in the trenches.- Status
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