Current pipeline project design, construction and acceptance of the main implementation of the current national and industry standards. The specific scope of application is shown in Table 1 and Table 2.Table 1
Industrial piping design specifications and their scope of application regulations
Fan
Name
Name
Applicable
Used
Pan
Surrounding
Industrial metal piping design code GB50316- 2000
Industrial metal pipelines and non-metallic lined pipelines with a nominal pressure less than or equal to 42MPa
Chemical piping design code HG/T20695-1987
Metallic and non-metallic pressure pipelines and vacuum pipelines for chemical industry with a design pressure of 35MPa or less. But the design pressure is less than 0.1MPa, the design temperature of -29-186 ℃ non-flammable and non-toxic pipelines, except for the design of thermal power plants DL5000-2000
Large and medium-sized thermal power plant design
Small-scale design specifications for thermal power plants
GB50049 2003
Compressed air station equipped with piston or screw-type air compressor with working pressure less than or equal to 0.8MPa, single displacement less than or equal to 100m 3/min
Oxygen station design specification GB50030-1994 single production capacity of not more than 300m 3/h, or high-pressure, medium-pressure process, deep-freezing air separation method for the production of oxygen and nitrogen. Oxygen station for the production of oxygen and nitrogen
Acetylene station design specification GB50031-1991 the use of calcium carbide production of acetylene acetylene station and acetylene pipeline hydrogen and oxygen station design specification GB50177-1993
Hydrogen and oxygen station for hydrogen production by water electrolysis and hydrogen station design specification for generator coal gas stations GB50195-1994
Atmospheric Pressure Fixed Bed Furnace Coal Gas Station and Gas Pipeline
Oil Depot Design Specification GB50074-2002 New and Expansion Works for Oil Depots, except for new and expansion works of oil depots with a volume of less than 500m 3, underground water-sealed, natural holes and temporary oil depots with a volume of less than five years. Automobile refueling station design and construction specifications
GB50156-2002
Automobile refueling station cold storage design specification GB50072-2001 various cold storage design
Boiler room design specification GB50041-2008
All kinds of boiler room design
In addition to the design specifications listed in Table 1, there are special design specifications, such as equipment selection specifications, piping layout design specifications, electrostatic grounding design specifications, associated with the heat
Pipe and casing design specifications, adiabatic engineering design specifications and so on. Part II: Materials
1 Scope
Specifies the basic requirements for materials used in the construction of pressure piping, including the selection of materials, restrictions on the use of materials, inspection requirements and marking provisions.
2 Normative references (omitted)
3 Terminology and definitions
3.1 Low temperature and low stress conditions
, pipe laying technology through the pipeline can not only solve the ceiling layer configuration is not standardized high school information papers, but also to ensure that all types of piping exercises in place. In the pipeline laying process, to strengthen the care about the pipeline high school data test papers connecting pipe mouth processing high school data test papers bending flatness fixed box location protective layer corrosion protection across the grounding line bending radius elevation, etc., the requirements of technical delivery. Pipe laying technology contains a number of ways such as wire channel, pipe racks, etc., in order to solve the problems of thin pipe walls and poor interfaces in the high school language electrical coursework, the rational use of pipe laying technology. Cable laying principles: at the junction box, when different voltage circuits cross, should be separated by a metal partition processing; the same wire trough, strong circuit shall be cut off at the same time the exercise power supply, cable laying is completed, to check and test processing. Electrical coursework in the commissioning department, according to the production process of high school information paper requirements, electrical equipment for no-load and with load under high school information paper regulation test; adjust the equipment so that it can work properly under normal working conditions and excessive work; for relay protection for the whole checking the fixed value, review and proofreading of the drawings, the preparation of complex equipment and devices high school information paper debugging program, the preparation of important equipment high school information paper testing program and system start-up. Data test paper test program and system start-up program; the whole set of start-up process of high school data test paper electrical equipment debugging work and over the operation of high school data test paper technical guidance. For the commissioning process of high school data test volume technical problems, as commissioning personnel, need to grasp the drawings beforehand, equipment manufacturers issued high school data test volume test reports and related technical information, and understand the site equipment high school data test volume layout and the high school data test volume electrical system wiring and so on, and then according to the norms and regulations, the development of equipment commissioning high school data test volume program.
Electrical equipment commissioning high school data test volume technology power protection high school data test volume configuration technology refers to the unit in the relay protection high school data test volume overall configuration, the need to maximize to ensure that the unit high school data test volume safety, and as far as possible to narrow the scope of the failure of the high school data test volume damage, or some abnormal high school data test volume conditions for automatic processing, especially to avoid the wrong high school data test volume protective device action. In particular, it is necessary to avoid the operation of the wrong high school data test paper protection device, and reject the operation to avoid unnecessary high school data test paper sudden stop. Therefore, the power high school data test paper protective device commissioning technology, the power protection device is required to achieve accurate and flexible. For the differential protection device high school data test paper commissioning technology refers to the generator a transformer group in the event of an internal failure, the need for external power high school data test paper to cut out and thus use high school data test paper the main protection device.
Means that the following conditions are met at the same time working conditions:
a) the maximum working pressure at low temperature is not greater than 30% of the maximum allowable working pressure at room temperature;
Note: Straight and butt-welded fittings class components of the maximum allowable working pressure according to the calculation of the GB20801.3 to determine; flanges, valves, class components of the maximum allowable working pressure according to the corresponding standards. Normal temperature pressure rating selection.
b) pipeline pressure, weight and displacement of the axial (tensile) stress is not greater than the sum of 10% of the material standard minimum tensile strength value (calculated displacement stress, does not take into account the stress coefficient);
c) is limited to the GC2 pipeline, and the minimum design temperature of not less than -101 ℃.
GB50316 low-temperature low-stress conditions for: design temperature lower than or equal to -20 ℃ of the pressurized pipeline components, the ring stress is less than or equal to 1/6 of the yield point in the steel standard, and is not greater than 50MPa conditions.
3.2 Resistance Welded Pipe
3.3 Electrofusion Welded Pipe
3.4 Plate Welded Pipe
3.5 Certificate of Quality
A form of proof of quality of the material (inspection document). By the manufacturing plant production department other than an independent authorized department or person, in accordance with the standards and contract provisions, according to batch on the delivery of products (or sampling) for inspection and testing, and indicate the results of the inspection documents.
Manufacturing plant quality certificate signed by the manufacturing plant independent of the production department of the inspection department and approved to take effect. Laws and regulations have provisions, the statutory inspection and testing organizations to issue a certificate of supervision and inspection.
4 . General provisions
4.1 Material selection
Owner or designer should be based on the specific conditions of use (including manufacturing, production and installation, media, operating conditions, working environment and testing, etc.) and the requirements and restrictions on the use of materials specified in this part, the selection of appropriate piping components materials. This part does not include welding, non-metallic and pipe support parts, etc., the material requirements
Requirements.
4.2 Material grade and permissible stress
a) This part of Appendix A, Table A-1 and Table A-2 provides the pipeline component materials, grade, permissible stress and the use of the range and other requirements;
b) According to GB/T GB/T20801.3-2006, Table 14, the pipeline component materials shall not be less than the performance of the corresponding materials selected in accordance with the Table A-1 and Table A-2. A-2;
c) The selection of other materials shall be recognized by the technical appraisal and evaluation of the institution with appropriate qualifications.
5. The basic principles of material selection
5.1 compressed components (except bolts) with materials should have sufficient strength, plasticity and toughness, in the lowest temperature should have enough resistance to brittle fracture. When the use of brittle materials with an elongation of less than 14%, the necessary safety measures should be taken.
5.2 selected materials should have sufficient stability.
Stability includes chemical properties, physical properties, corrosion and wear resistance, fatigue resistance and organizational stability.
5.3 selection of materials, materials should be considered in the possible open flame, fire and fire conditions under the applicability of the resulting changes in material performance and secondary hazards.
5.4 selected materials should be suitable for the corresponding manufacturing, production and installation, including welding, hot and cold processing and heat treatment requirements.
5.5 When several different materials are used in combination, the possible adverse effects should be considered.
5.6 Materials should be available and economical.
6 Restrictions on the use of materials
6.1 Ductile, gray and malleable cast iron
In addition to temperature and pressure conditions, ductile, gray and malleable cast iron shall not be used for GC1 piping, and gray and malleable cast iron shall not be used for piping in severe cycling conditions.
6.2 Structural steel
In addition to temperature, pressure and thickness conditions, structural steel shall not be used for GC1 pipeline components, class A sedated steel is limited to non-combustible and non-toxic media pipeline, used in welded parts shall not exceed 0.3% carbon content.
6.3 Pipes and fittings
Carbon steel and austenitic stainless steel welded steel pipe and its butt-welded fittings shall not be used for severe cycling conditions and GC1 level pipelines (in addition to GB/T9711.1 electrodes and its butt-welded fittings);
Pipeline constituent parts of the quality certificate and physical identification
Pipe fittings
Valve
item
item
Certificate
Physical marking
Identification
Packing list
Certificates Physical Marking
Packing List
Manufacturing Plant Name (or Trademark)
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▲▲▲▲Manufacturing Date and/or Ex-factory Date ▲ ▲ ○▲▲Product Name (Code, Inner part or lining material code ○ Product quantity, net weight ▲ ▲ Order unit
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Contract No.
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Inside
Capacity Requirements Attached Document Name Quantity
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Note: Pipes according to the "acceptance, packaging, marking and quality certification of steel pipe GB2102-88; (alloy steel pipe should be printed after the steel grade furnace number, batch
number).
Valves based on "General Valve Supply Requirements" GB/T12252-89 and "General Valve Marking" GB12220-89;
Pipe fittings based on "steel butt-welding seamless pipe fittings" GB12459-90, small-size fittings of the physical Marking is allowed to be appropriately omitted;
Standards other than the test items shall be agreed by the supply and demand sides and specified in the contract.
, pipe laying technology through the pipeline can not only solve the ceiling layer configuration is not standardized high school information papers, but also to ensure that all types of piping exercises in place. In the pipeline laying process, to strengthen the care about the pipeline high school data test paper connection orifice processing high school data test paper bending flatness fixing box location protective layer corrosion protection across the grounding line bending radius elevation, etc., requires technical briefing. Pipe laying technology contains a number of ways such as wire channel, pipe racks, etc., in order to solve the problems of thin pipe walls and poor interfaces in the high school language electrical coursework, the rational use of pipe laying technology. Cable laying principles: at the junction box, when different voltage circuits cross, should be separated by a metal partition processing; the same wire trough, the strong circuit shall be cut off at the same time as the exercise power supply, cable laying is completed, to check and test processing. Electrical coursework in the debugging of all high school information paper electrical equipment, in the installation process and after the end of the installation of
high school information paper adjustment test; energized to check all the equipment high school information paper interactions and interrelationships, according to the requirements of the production process high school information paper on the electrical equipment for the no-load and high school with the load under the information paper regulating the test; the adjustment of the equipment to make it under normal working conditions and overworked. Normal working conditions and excessive work can work properly; for relay protection to verify the fixed value, review and proofreading drawings, preparation of complex equipment and devices high school data test volume debugging program, preparation of important equipment high school data test volume test program and system startup program; for the whole set of startup process high school data test volume debugging of electrical equipment and run through the process of high school data test volume technical guidance. For the commissioning process of high school data test volume technical problems, as commissioning personnel, need to grasp the drawings beforehand, equipment manufacturers issued high school data test volume test reports and related technical information, and understand the site equipment high school data test volume layout and the high school data test volume electrical system wiring and so on, and then according to the norms and regulations, the development of equipment commissioning high school data test volume program.
Electrical equipment commissioning high school data test paper technology power protection device commissioning technology, power protection high school data test paper configuration technology refers to the unit in the relay protection high school data test paper overall configuration, the need to maximize to ensure that the unit high school data test paper safety, and minimize the failure of the high school data test paper damage range, or some abnormal high school data test paper conditions for automatic processing, especially to avoid the wrong high school data test paper working conditions, and to avoid the wrong high school data test paper. Automatic processing, in particular, to avoid the wrong high school data test paper protective device action, and refused to act to avoid unnecessary high school data test paper sudden shutdown. Therefore, the power high school data test paper protection device commissioning technology, the power protection device is required to achieve accurate and flexible. For the differential protection device high school information paper commissioning technology refers to the generator a transformer group in the event of an internal failure, the need for external power high school information paper to cut out and thus use high school information paper the main protection device.