With the continuous development of China's industry, the demand for energy is gradually increasing, so in order to strengthen the effective application of energy, we should strengthen the construction of pipeline transportation engineering, which is of great significance to the development of China's oil and gas industry. As an important way to transport energy, long-distance pipelines play an important role in China's petrochemical engineering. Therefore, in order to ensure the normal operation of long-distance pipeline engineering, we should solve the quality problems in long-distance pipeline engineering in time, strengthen supervision and management, and improve the quality level of long-distance pipeline engineering.
1 Main Pipeline Problems and Cause Analysis
In recent years, China's long-distance pipeline construction has made remarkable achievements, but there are still various quality problems in China's long-distance pipeline projects. In order to ensure safety in production and effectively reduce quality accidents, the problems and causes of quality management in long-distance pipeline construction are analyzed as follows:
The main quality management problems are in 1. 1
Long-distance pipeline engineering has the characteristics of many specialties, long distance and tight construction period. When bidding for a project, many construction units will participate, including construction units, testing units, preparation units and so on. Before bidding, although the qualification and project management level of each unit were strictly examined and screened, there are still some problems, which are embodied in the following aspects:
(1) For engineering construction units, there is a big gap in technical quality, which further reduces the technical management level.
(2) The mobility of supervisors in the supervision organization is large, and the management is not strict, so it is impossible to strictly control the quality of long-distance pipelines.
(3) The sense of responsibility of inspectors in some NDT units is poor, which leads to the phenomenon of missing evaluation and wrong evaluation.
Analysis of the main reasons for 1.2
(1) The construction management is not standardized and the responsibilities are not clear. Some construction units have heavy tasks, lack of technical management personnel and lack of construction site management personnel. Project managers, in particular, usually need to manage several projects and can't stay at the construction site for a long time, which leads to confusion in the management of the construction site and further reduces the construction quality. Some construction units subcontract too many services, and some subcontracting is not formal enough. In order to obtain more economic benefits, the general subcontractors are not strict enough to supervise the subcontractors, which leads to the construction quality failing to meet the requirements.
(2) The supervision work is not in place and the quality of the team is not high. Some supervision units lack perfect organization, the number of supervision engineers is not enough, some supervision engineers are of low quality, lack of professional knowledge and level, and their sense of responsibility is not strong, so the supervision of long-distance pipeline engineering is not in place, and the problems existing in the project can not be found in time, which greatly reduces the quality and effect of supervision work. At the same time, the supervision rules compiled by the supervision unit lack pertinence and maneuverability, which is inconsistent with the actual situation of the project.
(3) The professional level and service awareness of nondestructive monitoring personnel are poor. Some nondestructive testing units lack high-tech professionals, and some nondestructive testing personnel lack professional ethics and sense of responsibility, which leads to the quality of negative films not meeting the requirements, thus reducing the accuracy of negative film evaluation and failing to effectively and timely discover the quality problems existing in the project.
2 Supervision and management countermeasures
2. 1 Strengthen project participation in quality behavior supervision.
(1) Differentiated supervision and management of the construction unit. The so-called differentiated management is a model of comprehensive supervision of weak units and strengthening supervision of key processes and key points of units with different construction technical strength and construction management strength. In the process of supervision and management of construction units, the technical level and ability of construction units should be fully considered, and then differentiated supervision and management should be implemented.
(2) Strengthen the supervision and management of the quality behavior of supervision units. For the professional configuration of the supervision organization, the supervision organization should conduct a strict audit to check whether the professional configuration meets the needs of on-site management, and at the same time, the qualification of the supervision engineer should be strictly audited to ensure that the supervision engineer can meet the engineering requirements. If insufficient configuration is found, it should be rectified in time.
(3) Strengthen the supervision and management of NDT units. In order to ensure the quality of long-distance pipelines, we should also strengthen the supervision and management of nondestructive testing units to ensure that the welding quality meets the requirements. Therefore, first of all, the qualification of nondestructive testing units should be audited to ensure that nondestructive testing units not only have a sound quality management system, but also have perfect inspection and audit guidance to ensure that the qualifications of testing personnel meet the requirements.
2.2 Improve the entity quality supervision strategy
(1) Create the "First Sample Project". The construction of long-distance pipeline project is complex, involving many working procedures and quality control points, which makes the project quality control difficult. Therefore, it is necessary to reasonably select the monitoring stop site, strictly control the monitoring stop site, and complete the self-inspection and self-inspection of the same part of the project by establishing the "first sample project" to ensure the quality of work, so that the supervision organization can realize the point-to-area, and improve the engineering efficiency and construction quality.
(2) Strengthen the quality management of construction difficulties. In the process of long-distance pipeline construction, we often encounter places with complex terrain, such as mountainous areas, crossing roads, railways, rivers, etc., which requires the construction unit to formulate special construction technical schemes that meet the standards.
(3) Strengthen the inspection of raw materials and equipment. The quality of raw materials and equipment is directly related to the quality of engineering entities. Therefore, before entering the construction site, the quality of raw materials and equipment should be strictly checked, focusing on welding materials, pipeline steel pipes, accessories and anti-corrosion materials, as well as relevant quality assurance materials, including inspection reports and acceptance records.
3 Conclusion and understanding
In the construction of long-distance pipelines, there are still some quality problems, which have a negative impact on the operation of long-distance pipelines. The construction of long-distance pipeline project involves many units, and the construction quality management of each unit is directly related to the quality of long-distance pipeline project. Therefore, strengthening the supervision and management of all units, strengthening the supervision of engineering quality, optimizing the procedures, methods and means of engineering quality supervision, and formulating effective supervision countermeasures are important measures to promote the quality behavior of all engineering construction units to meet the requirements of specifications, improve the quality level of engineering construction, ensure the safe operation of long-distance pipeline industry, and are a strong cornerstone to promote the sustainable development of long-distance pipeline industry.
;