API Spec 5LCP:2006(2012) pdf download

API Spec 5LCP:2006(2012) pdf download.Specification for Coiled Line Pipe.
7.7.5 Cracks and Leaks
All cracks and leaks shall be considered detects.
7.7.6 Laminations and Inclusions
Any lamination or indusion extending into the face or bevel of the pipe and having a transverse dimension exceeding 1/4 in. (6.4 mm) is considered a defect. Pipe containing such detects shall be cut back until no lamination or inclusion is greater than 1/4 in. (6.4 mm). Any laniiiiation in the body of the pipe greater than or equal to in. (9.5 mm) in the minor dimension is considered a defect.
Disposition of such dekcts shall be in accordance with 8.6.9. item a orb. No specific inspection for laminations or inclusions by the manufacturer is required unless the purchaser specilies special nondestructive inspection on the purchase order.
7.7.7 Arc Burns
Arc burns are localized points of surface melting caused by arcing between electrode or ground and pipe surface, and shall be considered defects.
Disposition of pipe containing arc burns shall be in accordance with 8.6.9 except that removal of defects by grinding shall he subject to the following additional conditioning:
a. Arc bums may be removed by grinding. chipping. or machining. The resulting cavity shall be thoroughly cleaned and checked for complete removal of damaged material by etching with a lO% solution of ammonium persulphate or a 5% solution of nital.
b. If removal of damaged material is complete the cavity may be merged smoothly into the original contour of the pipe by grinding. provided the wall thickness is within specified limits.
7.7.8 Undercuts at Pipe-To-Pipe Welds
Undercutting of pipe-to-pipe welds is the reduction of thickness of the pipe wall adjacent to the weld where it is fused to the surface of the pipe. Undercutting on the outside surface can best be identified and measured visually. (Undercutting on the inside surface can be identified using radiographic or ultrasonic means). Minor undercutting on either the inside or the outside of the pipe is defined as follows and is acceptable without repair or grinding:
a. Maximum depth /32 in, (0.8 mm) and not exceeding 10% of the wall thickness with a maximum length of one-half the wall thickness and not more than two such undercuts in any 1 ft (0.3 mof the weld length.
h. Maximum depth of ‘/u in. (0.40 mm) any length.
Undercutting in excess of Item (a) above shall be considered a defect. Disposition shall be as follows:
a. Undercut defects not exceeding ‘/32 in. (0.8 mm) in depth and not exceeding l0% of the specified wall thickness shall be removed by grinding in accordance with 8.6.6. Item a.
b. Disposition of undercuts greater in depth than /32 in. (0.8 mm) or 10% of the specified wall thickness shall be in accordance with 8.6.9 Item h.
7.7.9 Pipe-to-Pipe Radial Offset
For all pipe. the radial offset at pipe-to-pipe welds shall not exceed 0.020 in. (0.5 mm) or 0.11. whichever is greater.
7.7.10 Other Detects
Any imperfections having a depth greater than 10% of the specified wall thickness shall he considered a defect. See 8.6.5.6 for defects discovered during radiography.
7.8 PIPE ENDS
Pipe shall be furnished with torch cut, unfinished or plain ends, unless otherwise specified on the purchase order.
7.9 DRIFT TESTiNG
Each spool of coiled pipe shall be tested through its entire length with a gauge ball of a diameter as agreed upon between the purchaser and the manufacturer. i’he gauge ball shall pass freely through the pipe.
8 Inspection and Testing
8.1 TEST EQUIPMENT
If test equipnivnt—whosc calibration and ‘erihatioei is requiied under the provisions of this Specification—is subjected to unusual or severe conditions sufficient to make its accuracy questionable, recalibration or reverification shall be perfomed before further use of the equipment.
8.2 TESTING OF CHEMICAL COMPOSITION
8.2.1 Chemical Analysis Sampling Frequency
The pipe manufacturer shall report the heat analysis and one product analysis representing each heat of steel used in the production of pipe under this specification.
8.2.1.1 Sampling Methods
At the option of the manufacturer, samples used for product analyses shall be taken from either finished pipe. skelp. tensile test specimens or flattening test specimens. The location of the samples shall be a minimum of 9O from the electric weld.
8.3 TESTING OF MECHANICAL PROPERTiES
8.3.1 TensIle Tests
At the option of the manufacturer longitudinal tests may utilize a full section specimen (see Figure I). or a strip specimen (see Figures 2 and 3) taken from finished pipe. The strip specimen shall be tested without flattening.
8.3.1.1 Tensile Testing Specimens
The type. and size of the specimens shall he reported. Strip specimens shall be approximately 11/2 in. (38.1 mm) wide in gauge length if suitable curved face testing grips are used or if the ends of the specimens arc machined to reduce the curvatures in the grip area.