01 SAMSS 035 PDF

01 SAMSS 035 PDF

SAMSS Home · SAMSS Descripción: 35 Author: Cherukunnon Jubu. 29 downloads Views KB Size. Report. Materials System Specification SAMSS API Line Pipe Materials and Corrosion Control Standards Committee Members Anezi. SAMSS Carbon Steel Pipes On-Plot – abr – Materials System in accordance with Saudi Aramco specification SAMSS

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Anezi, Mohammed Ali on Copyright? Materials and Corrosion Control Issue Date: Unless stated to the contrary in the Purchase Order, pipe manufactured to this specification must be suitable for internal and external coating with fusion bonded epoxy and other applicable coating materials. II Conflicts and Deviations A. Direct all requests to deviate from this specification in writing to the Company or Purchaser Representative, who shall follow internal company procedure SAEP and forward such requests to the Manager, Consulting Services Department of Saudi Aramco, Dhahran.

Manufacturing procedure qualification as per Annex B is required for all pipes. Q, R, or N Welded pipe: The pipe shall be marked with the actual grade. Maximum design metal temperature limitation established in ASME piping code for X-grade pipe shall be noted when substituting the B-grade pipe.

Annex B, N and O shall apply for all purchase orders.

Annex K is mandatory for all seamless pipes irrespective of service. Double seam pipe is not acceptable for size smaller than 60 inches nominal diameter. For pipe size 14 inches and larger, not for automatic welding, O. Smass of two or more wires is accepted as equal to two welding passes.

For wall thickness 7. Heat-treatment of pipe may be used in lieu of cold expansion, provided that heat treatment does not cause any adverse effect on the mechanical properties and pipe roundness.

Page 6 of 27 8. Silicon Titanium Vanadium Sulfur: The value shall be marked on each end on both the I. For thicknesses in excess of 1.

Surface Conditions, Imperfections and Defects Other surface imperfections [addition] d For pipe that is intended to be subsequently coated See Section Ithe surfaces to be coated shall be essentially free of scabs, slivers, cold laps, burrs or other surface defects that would impair the coating.

No pipe lengths less than Pipe lengths less than Pipe intended for subsequent internal coating shall have a maximum length of One acceptable method of determining local out-of-roundness is measurement of the maximum gap between a template and the pipe exterior. The template must conform to a circle of the pipe’s nominal diameter and the length of the template must be one-fourth of the nominal diameter, except that it need not be over 8 inches.

Weld reinforcement may be removed for the measurement or the template may have a groove to accommodate the weld seam or another reliable alternative method shall be used. For spiral-seam pipe, an 8 inches straight template parallel to the pipe axis may be used. Out-of-Roundness at the ends shall not exceed 1. On SAW pipe for automatic welding, local out-of-roundness deviation from the normal cylindrical contour in the form of peaking or flattening of the seam shall not exceed 0.

See commentary in 9. The residual stress test shall be done after the hydrostatic test.

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In addition, the first produced pipe shall be tested after changing the production line equipment settings. The specimen may be either flame cut or sawed from the parent pipe. The cut 305 be degrees from the spiral weld. Prior to cutting the ring, fiducial marks shall be placed on either side of the proposed samxs location. The assumed residual stress shall be computed using the following formula: See Annex N Hardness test is required on all line items of every purchase 011 including pipes ordered for non-sour service.

For pipe order with specified minimum average CVN value greater than 70 ft-lb, the Chevron type notch shall be used. Pipe furnished from Vendor inventory may be accepted with the standard API test pressure by negotiation.

The hydrostatic test shall be conducted after all manufacturing processes including repairs and heat treatments are completed. Retesting for DWT shall be same as that required for Charpy retests see paragraph The markings shall be paint stenciled using a medium and protective varnish that will provide a legible marking samss at least one year of outside storage. The varnish coating shall be hard drying and the dry film thickness should not exceed 50 micrometers. The size of the lettering shall be commensurate with the diameter of the pipe, but in no case less than 0.

Marking of Non-sour Service Pipe Welded pipe purchased for non-sour service shall be identified by painting a white longitudinal stripe, 2 inches wide by 18 inches long, on the inside surface of both ends. This requirement does not apply for seamless pipes. This stripe is intended to provide identification until the pipe is installed.

Editorial revision to clarify the scope pertaining to applicability of this specification to pipes procured to ASTM A Additional Information to samzs Supplied by the Purchaser [modification] a B. Characteristics of the Manufacturing Procedure [modification] For welded pipe, the manufacturing Welding Procedure Specification WPS shall document, as a minimum, all essential variables listed in Annex D and those listed below. A complete product test as samds by B. The manufacturer, trade name and type of weld wires and fluxes used for the PQR shall be specified on the WPS as essential variables.

Recycling of crushed slag or contaminated flux is not permitted. Brand name of “G” consumable, if used, is an essential variable. Separate welding procedure shall be written for making the skelp end weld for spiral welded pipe. The runoff for start and stop may extend up to one 1 inch at either end onto the base metal.

Repair welding procedures for the weld seam shall meet the essential requirements and testing of Annex D. Only electrodes identified on the repair welding procedure shall be used.

Saudi Aramco Inspection Representative may select the pipe from initial production run. These test results can be considered as part of production tests. If the electrode is under matching with respect to the strength of the base material, change in batch number of the electrode shall be an essential variable. Supervision of Level 1 personnel and interpretation of results shall be done by Level 2 employees.

Working practice for qualification shall be submitted to Saudi Aramco for approval. If this examination is done before the hydrostatic test, the Purchaser’s Inspector may, at his sole discretion, require re-examinations by manual ultrasonic method of any questionable areas after the hydrostatic test.

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Xamss shall be provided to mark the pipe when the nondestructive inspection equipment indicates an imperfection is present so that anomalous areas can be readily 0. Locations showing indications above the allowable limits may be reexamined by the manual ultrasonic method or by radiographic testing.

If no defects are located during re-examination, the original findings may be ignored. Additional scanning may be required by the Purchaser’s Representative to check questionable areas. Verification shall be done at the pipe mill.

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The acceptance criteria for laminar imperfection shall be in accordance with ISO The acceptance criteria shall be as follows: This testing is required to prevent blocking of the ultrasonic testing beam during weld inspection. It is applicable to pipe with wall thickness of 0. This annex is not applicable to in-plant piping. This class is for gas, two-phase flow, and liquid lines such as NGL, whose vapor pressure exceeds psia. Reference to Class I service has been discontinued because PSL 2 pipe ordered to this specification meets the requirements for Class I service by default.

Additional Information to be Supplied by the Purchaser [modification] Paragraph a shall be applicable for all purchase orders. This standard is not applicable to pipe manufacturers. For SAWL pipes with wall thickness higher than 1.

Specimens that buckle, collapse, deform or rip are considered invalid and the test must be performed again. Specimens must be firmly mounted to promote acceptable test results.

The orientation specified in Table 20 shall apply except that for spiral welded helical seam pipe, the specimen shall be transverse to the rolling direction of the skelp perpendicular to the helical seam. Isolated, definitely identifiable cracks shorter than 0. Blisters and their associated cracking which at no point extend more than 1 mm from the inner and outer pipe surfaces of the test specimen. Isolated longitudinal cracks i.

01 samss 035

If the cracks are located partly within 1. Steel that passes the HIC test, but has not been intentionally manufactured to be HIC resistant steel shall not be used.

Inspection Specific Inspection [modification] The frequency of inspection for HIC test shall be one pipe from each of the first three heats supplied by each mill from each purchase order shall be tested and one pipe out of every five subsequent heats. The pipes for testing can be selected by the purchaser’s representative from the heats containing the higher sulfur content.

One set of three specimens is required for HIC testing. Testing shall be carried out on all heats. Three samples shall be cut from one end, across the width of the plate.

These samples shall be oriented longitudinally, i. If several thicknesses are produced from a coil or plate of a single heat, then the thinnest shall be tested. Location and dimensions of coupons, and whether taken from pipe or plate. Results of cracking evaluation. Photomicrographs of metallographically-polished 1 micron finish.