Different oil and gas pipeline construction standards have their own characteristics for pipeline requirements. The following are the specific requirements of some major standards:

API standard

API SPEC 5L: The transmission steel pipe is divided into two product levels: PLS1 and PLS2. Compared with PLS1, the PLS2 level stipulates strength requirements for carbon equivalent, fracture toughness, maximum yield strength and maximum tensile strength, and has stricter control over harmful elements such as sulfur and phosphorus. Non-destructive testing of seamless pipes has become a mandatory requirement, and the content of the warranty and test traceability have also become mandatory requirements.

API 5CT: Casing and tubing are divided into 4 groups and 19 steel grades. According to the manufacturing method, it is divided into two categories: seamless steel pipes and welded pipes. Except for some steel grades that are limited to the use of seamless steel pipes, other steel grades can use not only seamless steel pipes but also straight seam welded pipes produced by resistance welding or electric induction welding methods.

ISO standard

ISO 3183-1: The A-level standard sets basic quality requirements equivalent to those specified by API SPEC 5L, and these requirements are universal.

ISO 3183-2: In addition to the basic requirements, the B-level standard also adds requirements for toughness and non-destructive testing.

ISO 3183-3: The C-level standard has very strict requirements on the quality and testing of steel pipes for special purposes, such as acidic environments, marine conditions and low temperature conditions.

ASME standard

ASME B31.3: In terms of design, the pipeline is required to withstand the system working pressure and temperature, consider strength and stiffness to avoid excessive deformation and fracture, and stress analysis is required to ensure that the allowable stress is not exceeded. In terms of material selection, it must meet the specified standards, and the materials must be tested for tensile and impact, with special consideration of corrosion resistance. During construction, welding methods, quality standards and connection requirements are specified, including pipeline support, fixing and docking requirements, and strict quality control and inspection are required during construction. Pressure testing and non-destructive testing must be carried out after installation, and long-term pipelines must be regularly inspected and maintained.

ASME B31.4: For liquid transportation pipelines, regulations are made on the design, material selection, construction, inspection and testing of pipeline systems. It is required to select appropriate pipe materials and pipe diameters according to the nature, flow rate, pressure and other factors of the transported liquid, and the pipe materials must meet the strength and corrosion resistance requirements. During construction, there are strict regulations on the welding, installation, support and hanger setting of the pipeline, and pressure tests and leakage tests must be carried out after installation.

ASME B31.8: Mainly used for natural gas pipelines, it has clear requirements for the design pressure, temperature range, pipe performance, etc. of the pipeline, and stipulates that the pipeline must be able to withstand the expected internal pressure, external pressure and temperature changes. Loads such as loads. Emphasize the integrity management of the pipeline system, including risk assessment, inspection plan, repair and maintenance of the pipeline to ensure the safe operation of the natural gas pipeline.

GB standard

GB 50251-2015 "Design Specifications for Gas Pipeline Engineering": stipulates the design pressure, strength calculation, pipe selection, etc. of the gas pipeline, requires the pipeline to select the appropriate pipe diameter and wall thickness according to factors such as design pressure and gas volume, and the pipe must meet the requirements of strength, toughness and corrosion resistance. It also stipulates the requirements for pipeline safety spacing, anti-corrosion and thermal insulation.

GB 50028-2006 (2020 edition) "Urban Gas Design Code": Applicable to the design of urban gas projects, with detailed provisions for the layout, installation, and material selection of indoor and outdoor gas pipelines. For example, there are minimum requirements for the nominal diameter of the gas inlet pipe, and there are clear regulations on the slope of the inlet pipe and the wall thickness of the buried pipe. Indoor gas pipelines must not pass through bedrooms, warehouses for flammable and explosive goods, etc., and generally use galvanized steel pipe threaded connections. In special cases, concealed installations must be easy to install and repair.

GB 50369-2014 "Oil and Gas Long-distance Pipeline Engineering Construction and Acceptance Code": Requirements are put forward for the construction process of oil and gas long-distance pipelines, including the construction process and quality control of pipeline assembly, welding, anti-corrosion, laying, and crossing. It is stipulated that pipeline welding personnel must have corresponding qualifications, welding processes must be evaluated, and welds must be subjected to non-destructive testing. The quality and construction of the pipeline anti-corrosion layer are required to meet relevant standards to ensure the anti-corrosion performance of the pipeline.

GB/T 20801-2006 "Pressure Pipe Specification Industrial Pipe": Classifies industrial pipelines according to medium characteristics, design pressure and design temperature, and puts forward different requirements for different types of pipelines in terms of materials, design, manufacturing, installation, inspection, etc. It stipulates that pipeline materials should have quality certification documents and their performance should meet the corresponding standards. Stress analysis and strength calculation should be carried out during design, and factors such as thermal expansion and vibration of the pipeline should be considered.

SY standard

SY/T 5037-2012 "Spiral submerged arc welded steel pipes for ordinary fluid transportation pipelines": stipulates the size, shape, weight, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of spiral submerged arc welded steel pipes for ordinary fluid transportation, and puts forward specific requirements for the spiral welds and pipe body quality of steel pipes.

SY/T 6194-2018 "Petroleum and Natural Gas Industry - Steel Pipes for Oil and Gas Well Casing or Tubing": specifies the technical conditions for casing and tubing for oil and gas wells, including steel grade, size, performance requirements, test methods, etc., to ensure that casing and tubing can be used safely and reliably in complex environments such as high temperature and high pressure in oil and gas wells.

SY/T 6690-2017 "Petroleum and Natural Gas Industry - Pipeline Transportation System - Pipeline Valves": specifies the design, manufacture, test, installation and maintenance of valves for oil and gas pipelines. The valves are required to have good sealing performance, corrosion resistance and operational reliability, and can work normally under the working pressure, temperature and medium conditions of the pipeline. The requirements for technical parameters such as valve pressure level, connection form, drive mode, and valve strength test, sealing test, etc. are specified.

SY/T 0413-2002 "Technical Standard for Polyethylene Anticorrosion Layer of Buried Steel Pipeline": specifies the technical requirements for materials, structure, construction process, quality inspection, etc. of polyethylene anticorrosion layer of buried steel pipeline. The polyethylene anti-corrosion layer is required to have good corrosion resistance, aging resistance and mechanical properties, and can effectively protect the pipeline from soil corrosion. There are specific regulations on the thickness, adhesion, impact resistance and other indicators of the anti-corrosion layer. The coating quality and construction environment conditions of the anti-corrosion layer must be strictly controlled during the construction process.