SY/T 4092-1995 Thermal insulation technical specification for offshore petroleum engineering
Some standard content:
Insulation design
Insulation structure
Insulation calculation
Construction of insulation layer
General provisions
Insulation of fixing parts and supporting parts···
Construction by bundling method.
Construction by pasting method
Construction by pouring method of rigid polyurethane foam
Construction of moisture-proof layer
Construction of protective layer
Quality inspection
Appendix A
Explanation of terms in this specification
Additional instructions
Appendix Thermal insulation technology for offshore oil projects Explanation of technical specification clauses 9)
(11)
Document of China National Petroleum Corporation
(95) CNPC Technical Supervision No. 731
Notice on the approval and release of 26 oil and gas industry standards including "Standard for Investigation Methods of Corrosion and Protection of Steel Pipelines and Storage Tanks"
To all relevant units:
"Standard for Investigation Methods of Corrosion and Protection of Steel Pipelines and Storage Tanks" and other 26 oil and gas industry standards (draft) have been reviewed and approved and are now approved as oil and gas industry standards for release. The numbers and names of the standards are as follows 1
SYF 0087-95
SY/T 05451995
SY/T 401395
SYT 4041-95
SY / T 4084-95
SY/T 4085-95
Standard for investigation methods of corrosion and protection of steel pipelines and storage tanks
Determination of thermal characteristic parameters of wax precipitation in crude oil - differential scanning calorimetry
Technical standard for polyethylene anticorrosion layer of buried steel pipeline (instead of SYJ4013-87)
Specification for installation and acceptance of wet steam generators for oil fields (instead of SYJ404189)
Technical specification for beach environmental conditions and loads
Technical specification for oil and gas gathering and transportation in beach oil fields
SY 7T 4086-95
SY/T 408795
SY/T 4088
SY T 4089-95
SY/T 4090 -95
SY/T 409195
SY / T 4092 -95
SY7T 409395 | |tt | 410095
SY/T 4101-95
SY/T 4102-95
SY/T 41031995
SY 4104—95
SY/T 008895
Technical specification for design and construction of pipeline network on beach structures
Technical specification for ventilation and air conditioning of beach oil projects Technical specification for water supply and drainage of beach oil projects Electrical specification of Weihai oil projects
Technical specification for power generation facilities of beach oil projects Technical specification for anti-corrosion of reef oil projects
Technical specification for thermal insulation of Weihai oil projects
Technical specification for selection and installation of cranes on beach oil facilities
Technical specification for design and construction of shallow-water steel fixed platforms
Technical specification for design and construction of shallow-water steel mobile platforms
Wellhead protection of beach oil fields Installation technical specification Technical specification for the design and construction of the beach slope sandstone artificial island structure
Technical specification for the design and construction of the beach wall steel formwork-concrete artificial island structure
Technical specification for the design and construction of the beach media
Technical specification for beach engineering measurement
Technical specification for beach geotechnical engineering investigation
Specification for the inspection and installation of valves
Welding and acceptance of steel pipelines
Quality inspection and assessment standard for petroleum construction projects Pipeline crossing and spanning projects
Technical standard for anode protection of the outer wall of the bottom of steel storage tanks
The above standards shall be implemented from June 1, 1996. China National Petroleum Corporation
December 18, 1995
1.0.1. This specification is specially formulated to standardize the design and construction of the beach oilfield insulation project, to ensure safety, reliability, advanced technology, economical and practical, and environmental protection. 1.0.2 This specification applies to the design, construction and acceptance of thermal insulation projects for pipelines, storage tanks, containment curtains, equipment and valve groups on offshore oil facilities. 1.0.3 In the thermal insulation design and construction of offshore equipment and pipelines, new thermal insulation materials, new processes and new structures should be actively adopted to improve the technical level and economic benefits of offshore thermal insulation projects.
1.0.4 Reference standards:
GB 548685
Test methods for expanded perlite insulation products
GB 1029488
Heat protection method
GB 10297--88
Determination of steady-state thermal resistance and related characteristics of insulation materials
Determination of thermal conductivity of non-metallic materialsSY/T4091-95 Technical specification for corrosion protection of offshore oil and gas projects1.0.5 In addition to the implementation of this specification, the thermal insulation design, construction and inspection of offshore oil and gas projects shall also comply with the provisions of the relevant current national standards (specifications). 2 Insulation design
2.1 Insulation structure
2.1.1 The insulation structure of equipment and pipelines should generally consist of an insulation layer, a moisture-proof layer and a protective layer. When the protective layer has moisture-proof properties, the moisture-proof layer may not be provided. 21.2 The external corrosion protection of equipment and pipelines before insulation shall comply with the provisions of the "Technical Specifications for Anti-Corrosion of Beach and Sea Petroleum Engineering".
2.1.3 Flanges, valves, manholes, etc. should adopt detachable insulation structures. Equipment cylinders, pipe sections, and other parts that do not require inspection should adopt fixed insulation structures. 2.1.4 When the thickness of the soft insulation layer is greater than 100mm and the thickness of the hard insulation layer is greater than 80mm, a double-layer or multi-layer insulation structure should be adopted, and the joints of the inner and outer layers should be staggered.
2.1.5 The insulation layer of vertical equipment and vertical pipes with a diameter greater than 0.6m should be provided with support rings or hooks and nails.
2.2 Insulation calculation
Calculation of economic thickness of insulation layer
2.2.1.1, pipelines and circular equipment with an outer diameter greater than 1020mm can be calculated as a flat insulation layer. The rest should be calculated as circular insulation layer. 2.2.1.2 The economic thickness of the plane insulation layer should be calculated according to the following formula: 6 =1.8975× 10-3L (r-vertical
where—
economic thickness of insulation layer: m
——-heat energy price, yuan/10°kJ
. thermal conductivity, WmC):
.—-annual operation time, h;
(2.2,1- )
Heat release coefficient of insulation layer: W/(m.℃): Equipment and pipeline outer surface temperature, ℃:
Ambient temperature, "C;
Unit cost of insulation structure, yuan, m:
Annual amortization rate of investment repayment,%.
The economic thickness of the circular insulation layer should be calculated according to the following formula: Du
3.795x10-3
fnt (t- )2A
dD,-Di
D. Outer diameter of insulation layer, 1
D”-Inner diameter of insulation layer, Im
Calculation of heat dissipation loss on insulation layer surface
In the formula,
The heat dissipation loss on the surface of the plane insulation layer shall be calculated according to the formula Q.
-The heat dissipation loss on the surface of the plane insulation layer, Wm
RThermal resistance of insulation layer, m2.芒／W
R,---Thermal resistance of the surface of the plane insulation layer, m2, ℃/W.2.2.2.2
The heat dissipation loss on the surface of the cylindrical insulation layer shall be calculated according to the formula O
2元(t—）
ID.+
The heat dissipation loss on the surface of the cylindrical insulation layer, W/勤:R·Thermal resistance of the cylindrical insulation layer, m·KW. 2.2.3
Calculation of the outer surface temperature of the insulation layer
The outer surface temperature of the plane insulation layer shall be calculated according to the following formula: (2.2.1— 2)
(2.2.1 — 3)
(2.2.2— 1)
(2.2.2 2)
In the formula.
tp=O,Rp+t=
Q±+iu
-The outer surface temperature of the plane insulation layer, "℃, the outer surface temperature of the cylinder insulation layer shall be calculated according to the following formula 2.2.3.2
t,-O.-R.+ t.=-
元+D. α
Outer surface temperature of the circular insulation layer, ℃.
(2.2.3— 1)bZxz.net
(2.2.3 — 2)
3 Materials
Selection of insulation materials
3.0.1.1 The thermal conductivity of the insulation material shall not be greater than 0.08W/(m-℃). The test methods and requirements shall comply with the provisions of "Determination of thermal conductivity of non-metallic solid materials - hot wire method".
3.0.1.2 The bulk density of the insulation material shall not be greater than 220kg/m2. The test methods and requirements shall comply with the provisions on density determination in "Test methods for expanded perlite insulation products".
3.0.1.3 The insulation material shall be non-combustible or flame-retardant treated. 3.0.1.4 The insulation material shall have good chemical stability, be insoluble, and not pollute the environment. Materials that do not cause corrosion damage to metal equipment. Heat resistance should meet design requirements. Test methods should comply with the provisions of "Determination of Steady-State Thermal Resistance and Related Properties of Insulating Materials - Protective Hot Plate Method".
3.0.1.5 The performance of commonly used thermal insulation materials should meet the requirements of Table 3.0.1. Performance of commonly used thermal insulation materials
Semi-rigid thermal insulation materials
Product name
Rough polyurethane foam
Polyethylene foam
Rigid inorganic thermal insulation
Hydrated calcium silicate
Soft thermal insulation materials
Waterproof perlite
Ultrafine glass felt
Rock mineral wool felt
Thermal conductivity
(w/m* c)
Volume density
(kg/m)
40 ~ 70
25 35
180～220
180-220
Compressive strength
Temperature resistance
≤400
3.0.2 Moisture-proof layer materials should be purchased from the original
3.0.2.1 Moisture-proof layer materials must have good waterproof and moisture-proof properties3.0.2.2 Moisture-proof layer materials must be resistant to air corrosion and microbial corrosion, and must not deform or mold.
Moisture-proof layer materials should have good chemical stability. Moisture-proof layer materials should not crack or powder easily under temperature changes and vibration conditions3.0.3 Principles for selecting protective layer materials
Protective layer materials should be non-combustible or flame-retardant materials3.0.3.2 The compressive strength of the protective layer material should not be less than 5MPa, and the tensile strength should not be less than 10MPa+The test method should comply with the relevant provisions of the "Test Methods for Expanded Perlite Insulation Products".
3.0.3.3 The protective layer should be easy to treat and can adhere to inorganic anti-corrosion coatings: beautiful appearance, easy to construct and maintain.
3.0.3.4 The protective layer should be non-toxic, odorless, and resistant to salt spray corrosion. 3.0.3.5 The performance of commonly used protective layer materials should meet the requirements of Table 3.0.3. Performance of commonly used protective layer materials
Aluminum foil-glass fiber reinforced plastic
Galvanized iron sheet
Aluminum metal plate
Original thickness (mm)
3.0.4 Principles for selecting adhesives
Compressive strength (MPa)
Tensile strength (MPa)
3.0,4.1 The adhesive has a bonding strength of more than 0.5MPa. 3.0.4.2 The adhesive should not corrode steel and insulation materials. 3.0.4.3 The adhesive should be non-toxic and not pollute the environment. 4 Construction of thermal insulation layer
4.1 General provisions
4.1.1 The joint width of the thermal insulation layer shall not exceed 5 mm. Staggered joints in the same layer: the upper and lower layers shall be pressed joints: and the overlap length shall not be less than 50 mm. 4.1.2 When soft insulation products are used for the longitudinal joints of horizontal pipelines, they shall not be arranged within 45” below the vertical centerline of the pipeline. When soft insulation products are used, they shall be arranged below the horizontal centerline of the pipeline. 4.1.3 The ends of the pipelines or the parts with plates shall be laid with insulation layers and shall be tightly sealed.
4.1.4 Except for the pipelines that need to be insulated as bundles according to the design requirements, the remaining pipelines shall be insulated separately
The insulation layer after construction shall not cover the equipment nameplate, and the opening of the nameplate shall be sealed and regular.
The skirts, supports, lifting ears, instruments, hangers and other accessories on the insulation equipment or pipelines may not be insulated when there is no design requirement. The thickness of the insulation layer allows deviation 4.1.7
Hard insulation products should be ±511mm, semi-hard and soft insulation products should be ±10mm
4.1.8 Allowable deviation of insulation layer volume: Hard and semi-hard insulation products should be less than 5%, soft and cast insulation should be less than 10%. 4.1.9 The hooks, pins and screws of the insulation layer should be welded firmly, the self-locking plate should not slide, and the bolt connection of the vibrating equipment should be prevented from loosening. 4.2 Installation of fixings and supports
Hooks and pins for fixing the insulation layer can be directly welded on the equipment with round steel of more than 6mm.
4.2.2 The material of the support should be ordinary carbon steel or steel.4Except for the pipes that need to be insulated according to the design, the rest of the pipes shall be insulated separately. The insulation layer after construction shall not cover the equipment nameplate, and the nameplate opening shall be sealed and neat.
The skirt, support, lug, instrument, hanger and other accessories on the insulation equipment or pipes may not be insulated when there is no design requirement. The allowable deviation of the insulation layer thickness: the rigid insulation product shall be ±511mm, and the semi-rigid and soft insulation products shall be ±10mm.
4.1.8 The allowable deviation of the insulation layer volume: the rigid and semi-rigid insulation products shall be less than 5%, and the soft and cast insulation shall be less than 10%. 4.1.9 The hooks, pins, screws and other fixings of the insulation layer shall be welded firmly, the self-locking plate shall not slide, and the bolted connection of the vibrating equipment shall be prevented from loosening. 4.2 Installation of fixing parts and supporting parts
The hooks and pins for fixing the insulation layer can be made of round steel with a diameter of more than 6 mm and welded directly on the equipment.
4.2.2 The material of the supporting parts should be ordinary carbon steel or steel.4Except for the pipes that need to be insulated according to the design, the rest of the pipes shall be insulated separately. The insulation layer after construction shall not cover the equipment nameplate, and the nameplate opening shall be sealed and neat.
The skirt, support, lug, instrument, hanger and other accessories on the insulation equipment or pipes may not be insulated when there is no design requirement. The allowable deviation of the insulation layer thickness: the rigid insulation product shall be ±511mm, and the semi-rigid and soft insulation products shall be ±10mm.
4.1.8 The allowable deviation of the insulation layer volume: the rigid and semi-rigid insulation products shall be less than 5%, and the soft and cast insulation shall be less than 10%. 4.1.9 The hooks, pins, screws and other fixings of the insulation layer shall be welded firmly, the self-locking plate shall not slide, and the bolted connection of the vibrating equipment shall be prevented from loosening. 4.2 Installation of fixing parts and supporting parts
The hooks and pins for fixing the insulation layer can be made of round steel with a diameter of more than 6 mm and welded directly on the equipment.
4.2.2 The material of the supporting parts should be ordinary carbon steel or steel.
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