Specification for Neoprene Coating on the Riser Casing 1 of 17

Transcription

1 Specification for Neoprene Coating on the Riser Casing Specification for Neoprene Coating on the Riser Casing 1 of 17

2 TABLE OF CONTENTS 1.SCOPE DEFINITIONS REFERENCES, CODES AND STANDARDS CONTRACTOR RESPONSIBILITIES GENERAL SPECIFICATIONS MANUFACTURING AND IN-PROCESS TESTING ACCEPTANCE TESTING/QUALIFICATION TESTING STORAGE, HANDLING AND SHIPPING...11 APPENDIX A: APPENDIX B: APPENDIX C: APPENDIX D: SUMMARY OF TESTS VENDOR DATA REQUIREMENTS LIST (VDRL) INSPECTION MATRIX RUBBER ADHESION TEST FIGURE: RUBBER ADHESION TEST Specification for Neoprene Coating on the Riser Casing 2 of 17

3 1. SCOPE This specification describes the requirements for material and the application of neoprene coating to the bundle riser casing to serve as the splash zone coating and to serve as vortex suppression strakes for BP Exploration, Inc.'s (BPX) Green Canyon Block 200 Field Development Project (Troika). This specification shall govern the materials, application, inspection, repairs, handling of bare and coated pipe, and other requirements for the control of external coating using neoprene rubber. The work includes the furnishing of all labor, materials, tools and equipment and the performance of all operations and incidentals necessary for the coating, handling, storage and shipping of coated pipe. Furthermore, the work shall meet any additional requirements stated elsewhere in the CONTRACT. 2. DEFINITIONS For the purpose of this specification, the following definitions shall apply: COMPANY: CONTRACTOR: The company, firm or individual with whom COMPANY enters into a CONTRACT to which this specification applies. STANDARDS: Industry codes, standards, and recommended practices referenced herein. WORKS: The location(s) at which manufacturing, inspection and testing are performed. 2.1 CONTRACTOR REPRESENTATIVE Vendor shall designate in writing to COMPANY an authorized representative to serve as liaison with COMPANY on matters associated with this specification and on the purchase order or CONTRACT referencing this specification. This representative shall be designated prior to the performance of services associated with this specification and the purchase order or CONTRACT referencing this specification. 2.2 DOCUMENT PRECEDENCE In the event of conflict between documents, the priority shall be as follows: a) Purchase order or CONTRACT b) This specification c) Referenced STANDARDS However, conflicts shall be reviewed and resolved with COMPANY's representative prior to initiation or continuation of the services to be performed in association with the purchase order or CONTRACT. CONTRACT: The entire written and signed agreement between the COMPANY and CONTRACTOR. 3. REFERENCES, CODES AND STANDARDS The latest versions of the following codes, STANDARDS and guidelines are incorporated Specification for Neoprene Coating on the Riser Casing 3 of 17

4 by reference, as applicable in the context of this specification. a) American Society of Mechanical Engineers ANSI/ASME B31.8 ANSI/ASME B31.4: Gas Transmission and Distribution Piping Systems Liquid Transportation Systems for Hydrocarbons, Liquid Petroleum Gas, Anhydrous Ammonia and Alcohols ANSI/ASME B31.3: Chemical Plant and Petroleum Refinery Piping Inspection of Pipeline Coatings Prior to Installation f) American Society for Testing and Materials ASTM D 149 Test Methods for Dielectric Breakdown Voltage and Dielectric Strength for Solid Electrical Insulating Materials at Commercial Power Frequencies ASTM D 257 Test Methods for D C Resistance or Conductance of Insulating Materials b) American Petroleum Institute API Spec 5L Specification for Line Pipe c) COMPANY SPECIFICATIONS Specification for Handling, Transporting and Storing of Line Pipe d) Steel Structures Painting Council SSPC SP 1 Solvent Cleaning SSPC SP 5 White Metal Blast Cleaning SSPC VIS 1 Pictorial Surface Preparation for Painting Steel Surfaces e) National Association of Corrosion Engineers ASTM ASTM ASTM ASTM ASTM D 412 Standard Test Method for Rubber Properties in Tension D 471 Standard Test Method for Rubber Property Effect of Liquids D 624 Standard Test Method for Rubber Property Tear Resistance D 1149 Standard Test Method for Rubber Deterioration Surface Zone Cracking in a Chamber D 2240 Standard Test Method for Rubber Property Durometer Hardness RP Recommended Practice, High Voltage Electrical Specification for Neoprene Coating on the Riser Casing 4 of 17

5 4. CONTRACTOR RESPONSIBILITIES CONTRACTOR shall obtain COMPANY's written approval for any changes from the requirements of this specification, or references, STANDARDS, codes, and drawings. In case of conflict between documents, the CONTRACT shall govern. This document is not intended to be all inclusive, and the use of the requirements set forth herein does not relieve CONTRACTOR of responsibility to perform all services in a safe manner, to meet applicable codes and STANDARDS specified by COMPANY, to comply with government regulations or to supply a product capable of performing its intended service. CONTRACTOR shall submit a Work Plan one week after the CONTRACT is signed. This plan shall include but is not limited to: QA/QC Plan Coating Procedures Schedule List of Materials and Equipment Location 4.1 CONTRACTOR SUPPLIED MATERIALS CONTRACTOR shall supply all coating materials required for the application of neoprene on the riser casing. 5. GENERAL SPECIFICATIONS 5.1 GENERAL The materials used in the neoprene coating shall have properties listed in the following sections Elastomer The elastomer shall be unvulcanized preshrunk material. It shall be compounded to meet or exceed the following properties when vulcanized. Hardness Rating Shore A Durometer (ASTM 2240) Tensile Strength 2000 psi minimum (ASTM 412) Ultimate Elongation 500% minimum (ASTM 412) Tear Resistance Angle Tear, Die C 200 lbs./in. minimum (ASTM 624) Ozone Resistance 100 hrs. (ASTM 1149) 412 Water Absorption Volume Change 5% maximum (ASTM 471) 4.2 COMPANY SUPPLIED ITEM Dielectrical Strength Greater than 533 volts/mil (ASTM D 149) COMPANY shall furnish API Spec 5L X 70 riser casing line pipe. CONTRACTOR shall take receipt of the line pipe after inspection and shall notify COMPANY of any discrepancies or damage. Volume Resistivity Greater than 3.25 x ohm cm (ASTM D 257) The elastomer materials shall be handled, stored and applied according to the manufacturer's specifications, or as directed by an authorized representative of the Specification for Neoprene Coating on the Riser Casing 5 of 17

6 coating manufacturer. Each material container shall be marked with a durable marking material to display the date of manufacturer, material trade name, number and batch number. Each batch of material shall be certified in writing, including the results of property tests that were conducted for quality assurance before packaging Bonding agents Tape The primer and other bonding agents shall be compatible with the elastomer material and shall be as recommended by the elastomer manufacturer. Full descriptions of the bonding agents to be used shall be submitted by CONTRACTOR to COMPANY prior to use. The descriptions shall include a statement from the elastomer manufacturer as to the suitability of the bonding agents for this application. The bonding agent shall be handled, stored and applied according to the manufacturer's specifications, or as directed by an authorized representative of the bonding agent manufacturer. Each material container shall be marked with a durable marking material to display the date of manufacturer, material name, neoprene rubber and batch number. Tape or other exterior molding shall meet with neoprene rubber manufacturer's approval, and shall be removed after neoprene rubber has cured Abrasive Material for abrasive cleaning shall be a steel grit and/or shot particle of a size that will produce an angular profile of not less than 2.5 mils nor more than 4.0 mils in depth. Worn abrasive shall be replaced with new material. The abrasive material and compressed air for blasting shall be free of impurities, water and oil. Adequate separators, dryers and traps shall be provided and kept air free of condensate. 5.2 EQUIPMENT AND LABOR Condition of Equipment All equipment and tools furnished by CONTRACTOR shall be of good quality, maintained in good operating condition and suitable for use to apply materials required by this specification. All equipment shall be subject to approval by COMPANY. Equipment shall be capable of coating joint lengths up to 42 feet long Rubber Wheels All cleaning and coating machines and pipe moving wheels or rollers shall be equipped with rubber wheels or wheels covered with hard fiber to prevent marking or denting the pipe. Knurled steel or other type wheels, capable of marking or indenting the pipe or coating shall be prohibited Holiday Detector The electrical equipment used to test the coating shall be portable, low amperage, adjustable voltage, pulse type holiday detector using audible signaling devices. The holiday detector shall be furnished with a coil spring electrode or a suitable brush type and pointed or tipped electrode Autoclave Labor The autoclave shall be capable of vulcanizing the elastomer under raised temperature and pressure. It shall be large enough to accommodate each joint of pipe for curing as a monolithic piece of neoprene Specification for Neoprene Coating on the Riser Casing 6 of 17

7 CONTRACTOR shall provide supervision and labor for the entire coating operation from the time of receiving the pipe to loading out for transport. CONTRACTOR shall provide the necessary facilities for COMPANY supervision and inspection of all the work. 5.3 SURFACE PREPARATION Preparation for Blasting Before blast cleaning, external surfaces shall be inspected and pre cleaned according to SSPC SP 1 to remove oil, grease and loosely adhering deposits. Visible oil and grease spots shall be removed by solvent wiping. Only COMPANY approved safety solvents which do not leave a residue shall be used. Pipe ends shall be protected by plugs to prevent entry of abrasive inside the pipe during blasting. Any abrasive that gets inside the pipe shall be removed before coating Preheating There is no preheating requirement Blasting The pipe surface to be coated shall be cleaned to a "White Metal" finish according to SSPC SP 5. The blast pattern shall be a uniform, angular anchor profile with a minimum depth of 2.5 mils to a maximum of 4.0 mils. For consistent surface finish, a stabilized working mix of the cleaning media shall be maintained by frequent small additions of a new grit commensurate with consumption. Infrequent large additions shall be avoided. The cleaning media working mix shall be kept clean of contaminants by continuous effective operation of blasting machine scalping and air wash separators After Blasting After blast cleaning, the pipe surface to be coated shall be examined. All surface imperfections, such as slivers, scabs, burrs, weld splatter or gouges shall be removed by grinding. Grinding is only allowed in so far as it will not reduce the wall thickness of the pipe to less than 92% of its nominal specified wall thickness. Pipe that cannot be repaired or that is dented shall not be coated. All ground areas shall be blasted again to the above requirements. After blasting, the inside and outside of the pipe shall be left clean and free of abrasive materials, dust or other blasting residue. A brush off air blast or vacuum type cleaner shall be used to clean the entire pipe. The cleaned pipe surfaces shall be protected from conditions of high humidity, rainfall or surface moisture. The cleaned pipe surface shall be coated within two hours after it is cleaned, and shall not be allowed to flash rust before coating. Total elapsed time between grit blasting and coating of the blast cleaned surface shall be kept to a minimum to avoid the formation of oxides on the surface. 5.4 COATING APPLICATION Application of Bonding Agents and Elastomer The primer shall be applied as soon after blasting as practicable but never more than two hours after blast cleaning. Care shall be taken to ensure that the condition of the metal surface remains as per SSPC PC 5 until it is primed. Another blasting shall be required if these conditions are not met. From blasting on through the application of bonding agents and elastomers, the pipe shall be kept at least 5 degrees F above the dew point. The application of the bonding agents and elastomer shall be performed according to Specification for Neoprene Coating on the Riser Casing 7 of 17

8 the manufacturers' recommendations. If an extruded coating process is used in the application, batch changes on any one pipe joint shall not be allowed. CONTRACTOR shall submit comprehensive procedures for the proposed operations to COMPANY for approval prior to application Vulcanizing Vulcanizing shall take place within eight hours of elastomer application. Elastomer shall be vulcanized in an autoclave using a combination of temperature and pressure as recommended by the elastomer manufacturer. CONTRACTOR shall submit a complete description of the procedure for the vulcanizing to COMPANY prior to coating Dimensions The pipe shall be coated with a 1.0 inch thick neoprene and shall have a cut back of six (6) inches from each pipe end. Each coating edge shall be beveled at a 90 degree angle Field Joints CONTRACTOR shall supply COMPANY with sufficient quantities plus 10 percent waste allowance of neoprene wrap around sleeves, bonding agents and tape to be used for field joint coatings. The wrap around sleeves shall be of the same material and thickness as the elastomer applied to the pipe. The circumferential edge of the wrap around sleeve shall have an overlap of three inches. The minimum width of the wrap around sleeve shall be 12 inches wide to completely cover the cut back area for the pipe field joint. The two part bonding agent shall be 3M company B/A 2216 epoxy adhesive quick hardening type able to set in one hour at the application temperature, with maximum bond strength achieved in 24 hours. The tape shall be suitable for this application according to the adhesive manufacturer's specifications. CONTRACTOR shall provide application procedures and temperature ranges. The tape shall be able to temporarily hold the wrap around sleeves in position until the bonding agent hardens. The tape shall then be removed Repairs Coating defects from visual inspection, hardness tests, sounding tests, thickness measurements, bond tests, holiday detector and obvious mechanical damage or other defects shall be marked by chalk or crayon and repaired by CONTRACTOR. Procedure for the repair of coating defects shall be approved by COMPANY before starting work. All repairs shall be at the discretion of COMPANY and only two repairs are allowed per pipe joint. No defect larger than one square foot is eligible for repairs. Repairs shall be as good as the rest of the coating and meet the provisions of this specification. Repairs shall satisfy all of the tests of this specification except the adhesion test. Repairs that fail the tests are rejected and the entire joint coating is to be removed and new coating applied. 6. MANUFACTURING AND IN PROCESS TESTING 6.1 INSPECTION AND TESTING COMPANY Access for Inspection COMPANY representatives shall be given ready access to inspect the CONTRACTOR's Specification for Neoprene Coating on the Riser Casing 8 of 17

9 quality control procedures, methods and results for the coating materials, equipment and CONTRACTOR's work. All stages of the work shall be subject to full time inspection by COMPANY or COMPANY's representative. Such inspection shall not relieve CONTRACTOR of the responsibility to provide materials and workmanship to this specification Inspection of COMPANY Supplied Pipe Upon receipt of line pipe or pipe bend material supplied by COMPANY, CONTRACTOR shall perform a thorough inspection. Any damage to the material such as dents, gouges, buckles, ovalization or damage to the weld bevels shall be recorded against the pipe mill number and reported to COMPANY. COMPANY may request CONTRACTOR to make repairs at COMPANY's expense or instruct CONTRACTOR to set aside and not coat pipe pending COMPANY's further instructions. Any damage discovered during subsequent stages of the coating or inspection operations shall be made good by CONTRACTOR at his expense Joint Identification For each joint of pipe, the following measurements, information and pipe identification shall be recorded before coating operations start. Pipe mill number Joint length Weight of bare pipe Any other information stenciled on the outside or inside of the pipe If the pipe mill number is not stenciled on the inside of the pipe it shall be paint stenciled there before coating. Pipe joint identification and pipe bend marks according to the drawings shall be paint stenciled on the neoprene coating Blasting Cleaning Inspection of the blasted surface shall be by comparison to the white metal blast cleaning standards in SSPC VIS TESTING OF ELASTOMER MATERIALS Prior to use, the elastomer shall be tested to the requirements as noted below: Hardness Rating Shore A Durometer (ASTM 2240) Tensile Strength (ASTM 412) 2000 psi minimum Ultimate Elongation (ASTM 412) 500% minimum Tear Resistance, Die C 200 lbs/in minimum (ASTM 624) Each batch of elastomer or fraction thereof shall be tested. A batch shall be defined as one load of the mixer used to compound the material or 700 lbs. whichever is less. Three samples from each batch shall be tested. Previously, run test documents shall be submitted to COMPANY to show that the elastomer compound to be used meets the following requirements: Ozone Resistance 100 hours (ASTM 1149) Specification for Neoprene Coating on the Riser Casing 9 of 17

10 Water Absorption, Volume Change 5% maximum(astm 471) Tests for the batch tests and the certification tests shall be performed on cured samples. All tested samples shall meet or exceed the specified requirements. Test certificates as per ASTM standards shall be provided to COMPANY for approval prior to use of the elastomer material. 7. ACCEPTANCE TESTING/QUALIFICATION TESTING 7.1 VISUAL INSPECTION The coating shall be inspected for imperfections, lack of bond at joints and ends, blister, lamination and any apparent irregularity. Any visually detected flaws shall be clearly marked with a waterproof crayon or marker using a contrasting color to the coating. COMPANY has the right to accept, reject, request repairs or require further tests at CONTRACTOR's expense. 7.2 SOUNDING The coating shall be sounded with a two pound hammer over its entire length along lines spaced every foot around the circumference or every 90 degrees whichever is less. The hammer shall be brought to the elastomer surface through a vertical height of at least three feet with a minimum of additional acceleration. CONTRACTOR shall exercise caution when hitting the hammer on the pipe so as not to damage the neoprene or causing loss of bond at the point of impact. Coating should produce a uniform pitch everywhere. Any marked difference in audible pitch or rebound response of the hammer shall be noted and the area marked as for visual flaws. COMPANY has the right to accept, reject, request repairs or require further tests at CONTRACTOR's expense. 7.3 COATING HOLIDAY INSPECTION The entire coating shall be electrically sparktested to detect faults such as voids, cracks, thin spots or foreign inclusions. The coating shall be tested using a coiled electrode except for the coating seams or joints which shall be tested with a pointed or tipped electrode. The test voltage shall be according to NACE Standard RP with a minimum of 15,000 volts. The detector voltage shall be adjusted at least twice each shift because of the many variables such as temperature and humidity, e.g. one adjustment is to done in the morning and another before starting work in the afternoon. The equipment shall be grounded according to the equipment manufacturer's instructions for proper inspection of the voltage. Any failure of the coating to pass holiday inspection shall result in rejection by COMPANY of that section of the coating. Rejection will require either complete recoating or repair at CONTRACTOR's expense. 7.4 THICKNESS MEASUREMENT Thickness will be calculated with a PI tape measurement and/or caliper measurement. Pipe will be concentric within the neoprene coating because coating is applied in sheet form and calendared to close tolerances. Specification for Neoprene Coating on the Riser Casing 10 of 17

11 7.5 HARDNESS TEST Hardness tests shall be taken at the same locations as the coating thickness measurements. Tests shall be comparable or calibrated to match Shore A durometer test specified for the coating material. Tests results shall be within the range of 63 to 68 to be satisfactory. 7.6 RUBBER ADHESION TEST CONTRACTOR shall perform rubber adhesion tests as described in Appendix A. CONTRACTOR shall perform rubber adhesion tests on at least two joints of pipe for each autoclave batch of neoprene. Tests that fail will require two additional successful tests to be made from the same batch of neoprene. 7.7 FIELD JOINT ADHESION TEST CONTRACTOR shall prepare a Field Joint Adhesion Test with the same cleaning and application steps that will be performed in the field construction. Visual, sound, hardness and tearing tests will be done on the field joint in the same way as is done on the neoprene coated pipe and with the same test requirements to be satisfactory. On successful completion of the test, CONTRACTOR shall prepare a written procedure for field joint application. 8. STORAGE, HANDLING AND SHIPPING Pipe shall be handled and stored in a manner to prevent damage to pipe walls, beveled ends and coating according to COMPANY Specification No.SP 051. All pipe handling shall be with equipment approved by COMPANY. Pipe or coating damaged by CONTRACTOR pipe movements shall be repaired or replaced by CONTRACTOR to the satisfaction of COMPANY. The coated pipe shall be stacked so that the exterior coating is not in contact with a hard surface which could cause coating damage. Stacking height is limited to the restrictions of the coating. The height may be further reduced by COMPANY if there are observed effects to the pipe or coating due to stacking. Pipe will be transported from the coating yard to the job site by truck, rail or barge as specified in the CONTRACT. Pipe shall be transported in a way that will protect the pipe and its coating. Pipe shall be loaded for safe shipping according to existing shipping standards and regulations. The field joint materials consisting of the wrap around sleeves, two part bonding agent and tape shall be packed in boxes and/or pallets with a waterproof outer cover. The packing shall be suitable for transport by truck and barge for storage at the fabrication site prior to use in the piping installation. 9. PERFORMANCE OF WORK CONTRACTOR shall guarantee that work performed on external coating of pipe shall be according to this specification. CONTRACTOR further guarantees the application of the coating system shall be according to the specifications of the material manufacturer. COMPANY shall have full access rights to the CONTRACTOR's plant and property to observe that these specifications are being followed. Specification for Neoprene Coating on the Riser Casing 11 of 17

12 Hardness Rating {Sec , 6.2} APPENDIX A SUMMARY OF TEST REQUIREMENTS Table 1 Elastomer Material Qualification/Acceptance Tests Tensile Strength {Sec , 6.2} Ultimate Elongation {Sec , 6.2} Tear Resistance {Sec , 6.2} Ozone Resistance {Sec , 6.2} Water Absorption {Sec , 6.2} Visual Inspection Sounding Table 2 Frequency of Tests Performed on Neoprene Bends coated Pipe Holiday Inspection All coated joints Thickness Hardness Test Rubber Adhesion Test 2 joints for each autoclave batch Field Joint Adhesion Test 1 successful field joint {Sec. 7.1} {Sec. 7.2} {Sec. 7.3} {Sec.7.4} {Sec. 7.5} {Sec. 7.6} {Sec. 7.7} Specification for Neoprene Coating on the Riser Casing 1 of 17

13 APPENDIX B VENDOR DATA REQUIREMENTS LIST (VDRL) CLIENT: P.O./S.C. NO.: LOCATION: Gulf of Mexico SELLER/SUBCONTRACTOR: EQUIPMENT TAG NO.(S): DESCRIPTION(S): Neoprene Coating The seller's/subcontractor's quotation shall state his intended compliance with this listing, as regards to the type of data required and schedule for data submittal, as well as the quantity and data form (reproducible, prints, etc.) indicated in the inquiry and purchase order/subcontract standard clauses. The seller/subcontractor shall confirm responsibility for similar compliance by his subvendors and/or subcontractors. As a part of the seller's/subcontractor's quotation, any deviation(s) from the data submittal schedule shall be shown in the comments column. All data submitted shall be identified with equipment tag number, equipment description, buyer's job number, and purchase order/subcontract number. AFTER ORDER IS PLACED, UNLESS OTHERWISE NOTED IN THE COMMENTS COLUMN, the following data submittal schedule shall apply: FOR APPROVAL DATA DUE 3 WEEKS AFTER PURCHASE ORDER/SUBCONTRACT IS PLACED, CERTIFIED CORRECT DATA DUE 4 WEEKS AFTER BUYER'S APPROVAL, RECORD DATA DUE 8 WEEKS AFTER PURCHASE ORDER/SUBCONTRACT IS PLACED. ABBREVIATIONS: Q = With Quotation, A = Approval, C = Certified, R = Record, P = Prints, RP = Reproducible, M = Microfilm, S = Shotdown Specification for Neoprene Coating on the Riser Casing 1 of 17

14 VENDOR DATA REQUIREMENTS LIST (VDRL) Data Data Required Code Data Description/Definition Q A C R Comments Coating Schedule 3P 6P 6P QA/QC Plan 3P 6P 6P Surface Preparation Procedure 6P Coating Procedure 6P Repair Procedure 6P Material Certificates 6P Visual Inspection 6P 6P Sounding Inspection 6P 6P Holiday Inspection 6P 6P Thickness measurement 6P 6P Hardness Test 6P 6P Rubber Adhesion 6P 6P Field Joint Adhesion Test 6P 6P Specification for Neoprene Coating on the Riser Casing 2 of 17

15 APPENDIX C INSPECTION MATRIX APPROVAL/DATE: INSPECTION LEVEL: C SPECIFICATIONS/CODES/STANDARDS: INSPECTION LEVEL: See Section 3 of this specification. Other Sections/Paragraphs listed below are references to information with this specification. A = B = C = D = Pre Coating Meeting, Regular In Process Insp. Witness Tests, Final Insp., Doc. Review One or More In Process Insp., Witness Tests, Final Inspection, Doc. Review Witness Tests, Final Insp., Doc. Review No Inspection, Review Vendor Submitted Documentation (if applicable) INSPECTION ACTIONS: 1 = Observe/Verify by Inspection 2 = Review of Documentation 3 = Obtain Certification/Test Documents Specification for Neoprene Coating on the Riser Casing 1 of 17

16 INSPECTION MATRIX ACTIVITIES COMMENTS 1 Precoating Meeting X QA Inspector to attend 2 Specification X Sec. 5 3 QA/QC Inspection Plan X Sec. 4 4 CONTRACTOR's Inspection of Line Pipe & X Ref. Sec. 4.2 Bends 5 Facilities & Equipment X Ref. Sec. 4 6 Coating Procedure X X Sec. 4 7 Material Certificates X X Ref. Sec. 4, Surface Preparation X X Ref. Sec Hardness Test X X X Ref. Sec Visual Inspection X X X Ref. Sec Sounding X X X Ref. Section Coating Holiday Inspection X X X Ref. Section Thickness measurement X X X Sec Rubber Adhesion X X X Sec Field Joint Adhesion Test X X X Sec Preparation for Shipment X X Ref. Section 8 17 Release for Shipment X X X QA Rept. to Release Specification for Neoprene Coating on the Riser Casing 2 of 17

17 APPENDIX D RUBBER ADHESION TEST Ref. ASTM D 429 Method E, 90 Peel Test The following procedure has been modified slightly from ASTM D 429 Method E to allow testing on the actual coated pipe rather than laboratory prepared samples: 1. At one end of the pipe, on the 6" cut back length, prepare an area approximately 6 inches square in the same manner as the rest of the pipe is prepared to receive the neoprene coating. This shall include the blast profile, primer application and cement application. 2. Apply a 4" long strip of 1" wide pressure sensitive tape running with the length of the pipe and near the edge of the prepared test area. 3. Using the same material as specified for the regular coating, apply an unvulcanized neoprene slab 2" wide x 5" long x 1/4" thick to the pipe on the prepared test area. Orient the slab in such a manner that the 5" length runs along the circumference of the pipe and that one end just overlaps the 1" wide pressure sensitive tape. Pressure roll the neoprene slab to ensure intimate contact with the pipe. 4. Wrap the test slab tightly with nylon tape in the same manner as the regular coating and cure in the autoclave. 5. After the pipe has been cured and the nylon tape removed, make two cuts in the test slab, parallel, one inch apart, running with the circumference, the full length of the test slab. The cuts should be through the full thickness of the test slab with the resulting 1" wide test strip centered on the slab. 6. Separate the 1" wide test strip at the masked end (pressure sensitive tape) and carefully peel the strap up a sufficient distance until the jaws of a suitable test clamp can be attached. 7. With a spring scale attached to the test clamp, pull the test strip with a 90 angle to the surface of the pipe. Increase the force until the test strip begins to peel away from the pipe. The minimum force required to maintain a uniform peel of the test strip from the pipe shall be 35 lbs. 8. After the test is completed, the neoprene slab shall be cut away from the pipe and the residue buffed off leaving the cut back on the pipe as originally specified Specification for Neoprene Coating on the Riser Casing 1 of 17