pipeline standard parameters

The parameters of the standard implementation of the line pipe

 

Application status of oil and gas transmission pipeline steel standard pipe technical standards from the development side and the scope of the division can be divided into international standards, national (regional) standards, industry standards and enterprise standards. An international standard such as ISO 3183, GB / T 971l is the national standard, API SPEC 5L is the industry standard, DNV OS-F101 can be considered as industry standards or enterprise standards, developed by the West-East Branch: XQl5-2003 corporate standards. Divided according to the content covered by the standard, can be conveying the steel standard divided into two categories: one category is limited to the steel pipe products and standards such as API SPEC 5L, GB / T 9711, the ISO 3 183, etc.; other pipeline system standards such as DNV OS-F101, CSA Z662, the standard of these pipeline systems, in addition to steel products as part of the standard content, the standard also involves other parts of the pipeline system, such as pipeline design, installation, and even operation and maintenance and much more. Technical standards in our use of oil and gas transmission pipe API SPEC 5L, GB / T 9711, DNV OS-F101, often involved in the standard ISO 3 183 CSAZ662 roughly as follows:

 (1) API 5L (Line Pipe specification) is the Mainz Petroleum Institute to develop a commonly used specification. Specification for steel products only and does not include the design of the pipeline, selection or installation. Traditionally, the technical requirements of API 5L is more reasonable, taking into account the technical requirements with the manufacturer of pipeline steel production possibilities, but the relative pipeline and pipe technology development, technical requirements in the APIs 5L is relatively loose, very few separate applicable to the requirements of the pipeline project on the steel pipe.

(2) DNV OS-F101 (subsea pipeline system) is a specification of Det Norske Veritas and developed specifically for the subsea pipeline. Covers a very broad, including all aspects of pipeline design, materials, manufacturing, installation, testing, operation, maintenance and so on. Solely on the technical requirements of the steel pipe, usually must be strictly compared to API 5L.

(3) ISO 3183-l (-2, -3) (Petroleum and natural gas industries - Steel pipe for pipelines - Technical delivery conditions: Pipes of requirement class A / Part II; / The third part of the B-grade steel pipe; Pipes of requirement class C) is the international standardization organizations to develop standards for the delivery terms on the oil and gas transmission pipe, steel pipes of different conditions of service, divided into A, B, and C are three levels. The standard does not involve the pipeline design, installation and so on. Technical provisions to develop a comprehensive and detailed.

(4) GB / T 9711.1 (2) is specifically marked Commission of China Standardization Committee pipe is equivalent to using IS03183-l (-2) standard developed by the petroleum industry Steel pipe for pipelines - Technical delivery conditions. API SPEC 5L line pipe specification and ISO 3183 (Steel pipe for pipelines - Technical delivery conditions) having a greater impact on the international line pipe specification, contrast, most of the world oil companies are accustomed to using the API SPEC 5L specification as line pipe procurement specifications. Domestic production pipeline steel API SPEC 5L standards and engineering design requirements only 20 years old. API SPEC 5L is a common standard around the world geography, climate and natural conditions vary widely, the nature of the transmission medium is not the same, so a lot of oil companies require the nature of the API are not the same, so a lot of oil companies will API SPEC 5L as a basic standard, on the basis of the standard, according to the actual local conditions or specific requirements of the pipeline to develop the quality and technology to supplement the technical specifications (technical conditions). "Technical conditions" of the West-East Gas Pipeline Steel is API SPEC 5L line pipe specification, combined with the specific situation of the West-East Pipeline to develop.

(2) the existing standards of the pipeline steel standard line pipe API SPEC 5L, GB / T 9711, DNV OS-F101 or ISO 3183, etc. After a long time repeatedly revised, improved, improved the results of Although each standard there are differences, but each standard itself can form a relatively complete system of independent, as a product delivery and acceptance conditions are reasonable and perfect. The lack of one of the main standard in most of the line pipe just for the steel pipe product itself, rather than related to pipeline design, the use of steel pipes. Pipeline design, the choice of line pipe according to other norms. This also formed the front as described in the "basic standard + steel pipe supplementary technical specifications of universal application. Actual use basic standard + steel tube complement the technical specifications in this way there are some problems, such as uneven development of the standard level; standard provisions inconsistent, not the system, some users in the development of supplementary conditions (standard) did not do a true sense of the study design, but mechanically copy from. Developed standards or terms are not comprehensive and sometimes repeated, and even contradictory. In the development of standards can not be good coordination between the supplementary technical conditions and the basic standards, the system is not uniform, the content is not coherent. There are some people due to their own standards do not fully understand, just from the quality risk of departure, that the technical requirements of the standard more Yanyue An, Vietnam will not quality safety accident occurs so in developing standards, the blind pursuit of high standards and strict requirements, regardless of the actual quality of the cost. After West-East project, line pipe procurement technical specifications copied to the technical requirements of the West-East project line pipe, vacuum degassing, calcium fortified ball processing requirements of raw materials must be used, but for some small diameter, wall thickness, low pressure sour gas pipeline, such a requirement is undoubtedly increase the cost. 3 Conclusions and Recommendations (1) pipeline steel as the indicators require a more stringent class of steels, to strengthen research in all sectors of production, and strive as soon as possible to keep pace with the level of international production. (2) continuous follow-up study of the development of the foreign line pipe specification. Extensive collection of line pipe standards at home and abroad, especially the big oil companies, the line pipe inspection and certification company corporate standards, comparative analysis of the differences between the different standards, familiar to develop the background of the indicators of the different technical requirements. (3) Based on the above results, in view of the Pipe Technical specifications of the pipeline project is commonly used "basic standard + steel pipe supplement the technical specifications of the actual organizational strength of the domestic unit preparation line pipe technical indicators to determine Guide specification . Compensate for common pipeline specification is missing and line pipe, design and other aspects of the lack of development of line pipe for different staff to supplement the technical specifications to provide adequate reference.