When PWHT is required, the following cases do not require second pressure testing: 5. The test duration shall not be less than 30 minutes. When liquid is used for pressure testing, the instrument impulse lines shall be flushed of all liquid and debris and shall be blown dried. If water is the testing media, its quality shall not affect the integrity of the instrument lead lines. However, it shall not be less than the minimum required by the applicable Code.
Cross-country or submarine pipelines may be exempted if a scraper will be used ahead of the test water to purge air from the lines before the test pressure is applied. If temporary supports are found to be needed and more economical than permanent supports, this should be highlighted in the hydrotesting procedure. The test pressure shall be calculated based on the pipe nominal wall thickness less the mill tolerance manufacturer's minus tolerance.
External coating and priming of such joints are not allowed unless approved by the Manager of Inspection Department and the proponent Organization representative.
The pipe itself can be externally primed and coated to a final coat. All field welds shall be visible for leak detection during the hydrotest. The maximum allowable external pressure for the internal line shall not be exceeded during the jacket pressure test. The differential pressure can be minimized by pressurizing the internal line. The test pressure shall be 1. Test duration shall be in accordance with 7. The test pressure shall be maintained for a minimum of 2 hours while the joints are inspected for leakage.
If for justifiable safety reasons the line must be back-filled, then the joints shall remain exposed during testing, otherwise the test shall be a 24 hour recorded test. The test pressure is in accordance with 7. Post on Dec 1. Category: Documents download. Tags: api std existing tanks reconstructed tanks tank repair standard addresses saudi aramco engineer engineering standard appendix g.
All rights reserved. The text in each paragraph below is an addition to or a deletion from API STD , unless it is noted as an exception. Sufficient time shall be allowed for evaluation. The procedure and acceptance criteria for conducting these evaluations are not included in this standard. Such evaluations shall be performed by an engineer experienced in design and evaluation of storage tanks covered by this standard. However, any repair of the radial welds joining the annular plate ring sections shall not be considered a major repair unless there is a significant differential settlement around the circumference of the tank that would impair the structural integrity of the shell-to-bottom connection.
Crude oils are not included in this category. Doha Tower - Qatar. ABV Rock Grou. Wastewater Treatment Opportu. If utilizing an alternative methodol. Saudi Aramco Safety Policy Saudi Aramco will conduct its business in a manner that prevents incidents or accidents which cause loss of life, bodily injury or illness, or damage to property, assets or the environment.
When the last day for any notice to be given under the Agreement falls on a day which is no. Today, it produces more oil than any other company in the world; it produces about 1 in every 9 barrels globally. Because of the heavy workload and long waiting times for routine services, all prospective employees and dependent.
Saudi Aramco, Dhahran. Saudi Aramco 2. SABIC 3. Schlumberger Petro Rabigh Unilever Sipchem
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