10annual Sanders

8/9/2019 10annual Sanders

1/19

Update on the API

Work Group Activitieson Pipe Markings


2/19

API Pipe GradesAPI Pipe GradesGrade B, X42, X52, X60, X65, X70, X80


3/19


4/19

API Pipe GradesAPI Pipe GradesGrade B, X42, X52, X60, X65, X70, X80

And TwoAnd TwoProduct Specification LevelsProduct Specification Levels

PSL 1 and PSL 2


5/19

API Grade X60, PSL 2

Yield Strength Range 60.2 81.9 ksi

60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94

API Grade X65, PSL 2Yield Strength Range 65.3 87 ksi

Yield Strength in ksi




6/19

Historically, it has been a commonHistorically, it has been a common

practice to apply dualpractice to apply dual--gradegrade

markings at the lower end of themarkings at the lower end of the

grade spectrumgrade spectrum


7/19

The most common dual gradeThe most common dual grade

product has always beenproduct has always beenGrade B/X42Grade B/X42

Other common dual-grade items are:

-X42/X46

-B/X42/X46

-X42/X52


8/19

- Pipe manufactured as Grade X60 (415) or

higher shall not be substituted for pipe ordered

as Grade X52 (360), or a lower grade, without

the purchaser's approval.

API Specification 5L Provides Only Minimal

Guidelines regarding dual markings for Line Pipe:

- API Spec 5L, Annex N specifically allows

marking pipe with comparable specifications.

This allows pipe to have API markings as well

as CSA or ISO designations


9/19

In the last few years, pipe mills haveIn the last few years, pipe mills have

seen an increased number ofseen an increased number of

requests for application of dualrequests for application of dual--gradegrademarkings in upper grades.markings in upper grades.

-- X60 / X65X60 / X65

--X65 / X70X65 / X70-- X60 / X65 / X70X60 / X65 / X70

--X70 / X80X70 / X80


10/19


Yield Strength Minimum 60.2 (no maximum for PSL 1)

60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94



Yield Strength in ksi





96 98 100 102 104




11/19

X52 PSL 1, X60 PSL1, X65 PSL 1,X52 PSL 1, X60 PSL1, X65 PSL 1,

X70 PSL 2, X80 PSL 2X70 PSL 2, X80 PSL 2

There have been reports of pipe beingstenciled and certified as follows:


12/19



60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94

API Grade X65, PSL 2Yield Strength Range 65.3 87 ksi




13/19

Welding Procedures shall be qualified within theWelding Procedures shall be qualified within the

following grade ranges:following grade ranges:


14/19

One pipeline operator reported that they were laying a line

of X65 PSL 2 pipe. They were using X65 / X70 dual grade

pipe in the line. They were audited by the pipeline

regulatory agency (PHMSA) and all of their welding

documentation referenced qualification of API Grade X65,

PSL 2. Since the pipe was X65 / X70 and each grade isrequired to be qualified separately, the auditor would not

accept the X65 documentation.


15/19

Proposal Issued for Vote to the API Membership for

requirements to be added to API Spec 5L:


16/19

Marking of Pipe to Multiple Grades:

Marking of pipe to multiple grades is permitted only by agreement between the

purchaser and the manufacturer within the following guidelines:

- Pipe may have multiple markings within the following grade ranges:

< X42

X46, X52, X56 (including intermediate grades)

For X60 & above, marking of multiple grades is prohibited

- The manufacturer is responsible to assure that the pipe conforms to

all requirements of each of the certified grades. This allows pipe to beused as any of the grades individually.

- Pipe shall be marked to only one PSL level.

- Where pipe is marked to multiple grades, a single certification

document shall be issued referencing the grade combination as

marked on the pipe. The certification document may contain a specificstatement that pipe conforms to each grade individually.

- Pipe shall only be re-graded and re-marked under the

manufacturers control. Certificates for re-graded pipe may only be

issued by the pipe manufacturer.


17/19

The results of the ballot were surprising. Overall, the votes

were for acceptance of the new requirement. However, asexpected, there were a number of negative votes.

The biggest objection was that the current proposal

restricts dual-grading of X42 / X52, which has been acommon industry practice.

API requires that negative ballots must be resolved

before the item can go forward.


18/19

The work on this item is currently on-going.

A new edition of API Specification 5L will probably be

issued early 2011. It is the intent of the work group to have

this item finalized and ready for publication in the next

edition of the Specification.

Before that can happen, all negative votes have to be

resolved and the exact wording of the requirement will

need to be finalized.

The final version will be reviewed by members of the API

1104 group as well as the API Quality group to assure

compliance with those requirements.


19/19

Marking of Pipe to Multiple Grades:

Marking of pipe to multiple grades is permitted only by agreement between the

purchaser and the manufacturer within the following guidelines:

- Pipe may have multiple markings within the following grade ranges:

< X42

X46, X52, X56 (including intermediate grades)

For X60 & above, marking of multiple grades is prohibited

- The manufacturer is responsible to assure that the pipe conforms to

all requirements of each of the certified grades. This allows pipe to beused as any of the grades individually.

- Pipe shall be marked to only one PSL level.

- Where pipe is marked to multiple grades, a single certification

document shall be issued referencing the grade combination as

marked on the pipe. The certification document may contain a specificstatement that pipe conforms to each grade individually.

- Pipe shall only be re-graded and re-marked under the

manufacturers control. Certificates for re-graded pipe may only be

issued by the pipe manufacturer.

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