API 5ST:2020 pdf free download.Specification for Coiled Tubing U.S. Customary and SI Units
Where visual inspection is performed during the inspection of welds and imperfection prove-up, the visual inspection shall be conducted by personnel who are trained to detect and evaluate surface imperfections and have visual acuity that meets the applicable requirements of ASNT Recommended Practice No. SNT-TC-1A or equivalent.
10.5.2 Skelp End Welds Skelp end welds shall be inspected in skelp form by radiographic inspection in accordance with 10.6. Other methods such as ultrasound, magnetic particle and liquid penetrant inspection shall be performed by agreement between the purchaser and the manufacturer, as stated on the purchase agreement.
10.5.3 Seam Welds Seam welds shall be inspected full length (100 %) by ultrasonic or electromagnetic methods in accordance with 10.8.1 through 10.8.4. The location of equipment in the manufacturer’s facility shall be at the discretion of the manufacturer.
10.5.4 Tube-to-Tube Welds Tube-to-tube welds shall be inspected by radiographic or ultrasonic methods. Other methods such as magnetic particle inspection and liquid penetrant inspection, shall be performed by agreement between the purchaser and the manufacturer, as stated on the purchase agreement.
10.5.5 Full Body Inspection After Hydrostatic Test By agreement between the purchaser and the manufacturer, and when specified on the purchase agreement, the tubing shall be nondestructively inspected in accordance with SR37 (see Annex D).
10.6 Radiographic Inspection of Skelp End Welds and Tube-to-tube Welds 10.6.1 Radiographic Inspection Equipment The homogeneity of skelp-end welds and tube-to-tube welds examined by radiographic methods shall be determined by means of x-rays directed through the weld material onto a suitable radiographic film, or to a detector which will display onto a screen and be permanently recorded by a digital medium, provided adequate sensitivity can be obtained.
10.6.2 Radiography Reference Standards
10.6.2.1 General Unless otherwise specified on the purchase agreement, the reference standard shall be the ASTM hole-type image quality indicator (IQI) described in Table A.11 , the ASTM wire-type image quality indicator described in ASTM E747 and Table A.1 1, or the ISO wire-type image quality indicator described in ISO 1027, and Table A.12 and Table A.13. By agreement between the purchaser and the manufacturer, other standard image quality indicators may be used, provided that an equivalent or better sensitivity is achieved.
10.6.2.2 ISO Wire Image Quality Indicator The ISO wire-type image quality indicator shall be Fe 6/12 or Fe 10/16 in accordance with ISO Standard 1 027, and with Table A.12 and Table A.13 for the appropriate wall thickness. When the wire image quality indicator is placed in proximity to the weld, the diameter of the wire employed shall be based on the specified wall thickness plus the estimated thickness of the weld reinforcement (not to exceed the maximum allowed) at the image quality indicator location. When the image quality indicator is placed on the base metal, the diameter of the wire employed shall be based on the specified wall thickness.
10.6.2.3 ASTM Image Quality Indicator The ASTM image quality indicator shall be in accordance with Table A.11 for the appropriate wall thickness. Either a wire type (in accordance with ASTM E747) or a hole type (in accordance with ASTM E1025) shall be used. The sensitivity may be modified by agreement between the purchaser and manufacturer, as stated on the purchase agreement.
10.6.3 Frequency of Use of Image Quality Indicator The image quality indicator shall be used to check the sensitivity and adequacy of the radiographic technique on each skelp-end weld and each tube-to-tube weld. The skelp or pipe shall be held in a stationary position during the adjustment of the sensitivity of radiographic technique by use of the image quality indicator. Proper definition and sensitivity is attained when the following is clearly discernible:
a) individual wires of the ISO image quality indicator, or
b) the 2T hole in the ASTM image quality indicator.API 5ST pdf download.API 5ST:2020 pdf free download
