API 5CT:2006 pdf download

API 5CT:2006 pdf download.Specification for Casing and Tubing.
non-linear imperfection
imperfection which includes, but is not limited to, pits and round-bottom die stamping
NOTE See API Std 5T1.
4.1.28
pipe
casing, tubing, plain-end casing liners and pup joints as a group
4.1.29
pipe mill
firm, company or corporation that operates pipe-making facilities
4.1.30
plain-end casing liner
casing provided unthreaded and with a wall thickness often greater than that specified for J55
4.1.31
processor
firm, company or corporation that operates facilities capable of heat-treating pipe made by a pipe mill
4.1.32
product
pipe, coupling, accessory, coupling stock or coupling blank, either individually or collectively as applicable
4.1.33
pup joint
casing, tubing or plain-end casing liner of length shorter than Range I
4.1.34
pup-joint material
standard casing or tubing, or thick-wall tubes or mechanical tubes, or bar stock used for the manufacture of pup joints
4.1.35
purchaser
party responsible for both the definition of requirements for a product order and for payment for that order
4.1.36
quench crack
crack in steel resulting from stresses produced during the transformation from austenite to martensite
NOTE This transformation is accompanied by an increase in volume.
4.1.37
seamless pipe
wrought steel tubular product made without a weld seam
NOTE It is manufactured by hot-working steel, and if necessary, by subsequently cold-working or heat-treating, or a combination of these operations, to produce the desired shape, dimensions and properties.
4.1.38
skelp
hot-rolled steel strip used for manufacturing EW pipe
4.1.39
special end-finish
threads with thread form and features, manufacturing specifications, dimensions, connection make-up and performance properties which are beyond the scope of this International Standard
requwemenNnA5(SR1I)is specified on the purchase agreement.
Grade Q125 upset casing shall be provided only when the supplementary requirement in A.5 (SRIO) is
specified on the purchase agreement.
6.2 Heat treatment
6.2.1 General
Product shall be heat-treated in accordance with a documented procedure as stipulated in Table C.4 or Table E.4 for the particular grade and type specified on the purchase agreement. Heat-treated upset pipe shall be heat-treated full length after upsetting. Product requiring heat treatment shall be heat-treated the full length. Individually heat-treated coupling blanks are acceptable. All pipe processed through a hot-stretch mill (i.e. stretch-reduced) shall be considered normalized, provided the exit temperature is above the upper critical temperature (Ar3) for the steel being processed and the pipe is air-cooled.
The weld seam of electric-welded pipe shall be heat-treated after welding to a minimum temperature of 540 °C (1 000 °F) or processed in such a manner that no untempered martensite remains.
6.2.2 Group I
Grade N80 Type I product shall be normalized or, at the manufacturer’s option, shall be normalized and tempered. Grade N800 product shall be quenched and tempered (including the interrupted quenching followed by controlled cooling method) full length. Grades J55 and K55 casing and Grade J55 tubing shall be heat-treated if so specified on the purchase agreement.
Additional requirements for PSL-2 and PSL-3 products are specified in Annex H.
6.2.3 Group 2
When requested by the purchaser, the manufacturer shall produce evidence to show that the tempering practice will result in the pipe attaining the minimum tempering temperature.
Grade L80 13Cr may be subject to embrittlement when tempered below 620°C (1 150 °F). When all product meets the requirements in 7.3, 7.4.5, 7.5.3 and 10.7, no further precautions are necessary.
NOTE In this International Standard when the symbol L80 is used alone it covers Grades L80 Type 1, L80 9Cr and L80 13Cr.
6.2.4 Groups 3 and 4
Product furnished to this International Standard shall be quenched and tempered.
6.3 Straightening
6.3.1 Groups I and 3
No specific methods are required.
Additional requirements for PSL-2 and PSL-3 products are specified in Annex H.