Notification of the Ministry of Housing and Urban-Rural Development of the People's Republic of China
No. 776
Announcement of the Ministry of Housing and Urban-Rural Development of the People's Republic of China on publishing the national standard Technical code for fluid seal gas holder of industrial enterprises
Technical code for fluid seal gas holder of industrial enterprises has been approved as a national standard with a serial number of GB/T 51094-2015, and shall be implemented from November 1, 2015.
Authorized by the Research Institute of Standards and Norms of the Ministry of Housing and Urban-Rural Development of the People's Republic of China, this code is published and distributed by China Planning Press.
Ministry of Housing and Urban-Rural Development of the People's Republic of China
March 8, 2015
Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
According to the requirements of Document JIANBIAO [2011] No.7 issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China - Notice on printing and distributing the development plan on engineering construction national standards in 2011, this code is prepared by China Petroleum & Chemical Engineering Survey and Design Association and East China Engineering Science & Technology Co., Ltd. jointly with organizations concerned.
During the preparation process of this code, the drafting group, through extensive investigation based on code application specialty, summarization of practical experience over the years and consultation of relevant national and foreign standards, reviewed and finalized the code, on the basis of extensive consultation.
This code consists of 13 clauses and 8 appendices. The main technical contents include: general provisions, terms and symbols, basic requirements, material, basic parameter of construction, designed basic parameter, basic constructional component design, accessory design, gas holder series, gas holder selection, technical requirements for fabrication and inspection on gas holder, technical requirements for acceptance of gas holders, safe operation administration of gas holder, etc.
The Ministry of Housing and Urban-Rural Development of the People’s Republic of China is in charge of the administration of this code; the Branch of Chemical Engineering, China Association for Engineering Construction Standardization is responsible for the routine management; East China Engineering Science & Technology Co., Ltd. is responsible for the explanation of specific technical contents. In case of any opinion and suggestion in the process of implementing this code, please send a mail to East China Engineering Science & Technology Co., Ltd. (Address: No. 70 Wangjiang East Road, Hefei, Anhui, 230024, China) for reference in future revision.
Technical code for fluid seal gas holder of industrial enterprises
1 General provisions
1.0.1 This code is developed with a view to effective management of low-pressure steel fluid seal gas holders for gas storage in industrial enterprises [hereinafter referred to as the “gas holder(s)”] and to ensuring scientific design, economic rationality and safe operation of gas holders in engineering.
1.0.2 This code is applicable to low-pressure steel fluid seal gas holders of industrial enterprises, and other gas holders for gas storage that meet all of the following conditions;
1 The steel fluid seal gas holders have a design pressure less than or equal to 4,000 Pa and larger than the pressure from the dead weight of lifting part of gas holder;
2 The steel fluid seal gas holders have a nominal volume of 50 m3 ~ 100,000 m3;
3 The steel fluid seal gas holders are used for storage, buffering, pressure regulation and mixing in the installation of chemical industry, petrochemical industry, municipal gas service and biochemical engineering, etc.
1.0.3 This code is not applicable to low-pressure steel fluid seal gas holders containing an extremely or highly hazardous medium that is soluble in water.
1.0.4 In addition to those specified in this code, the design, fabrication, inspection and safe operation administration of low-pressure steel fluid seal gas holders shall also meet the requirements of the current relevant standards of the nation.
2 Terms and symbols
2.1 Terms
2.1.1
pressure
pressure generated by the compression of gas stored in gas holder, which, unless otherwise indicated, refers to gauge pressure
2.1.2
operating pressure
gas storage pressure generated by the dead weight of movable segment structure of gas holder piston structure (including the counterweight); for multiple movable segments of gas holder, indicate the operating pressure where the bell jar is lifted and the ones where other movable segments are lifted
2.1.3
design pressure
maximum operating pressure generated during the operation of gas holder
2.1.4
calculating pressure
pressure used for determining the calculating thickness of each part or each component of gas holder
2.1.5
design temperature
mental temperature set for wall plates and pressure components of gas holder in normal use
2.1.6
type non-outer-guiding gas holder
vertical-lift gas holder composed of movable segments welded on the wall of movable segments with straight guide rails
2.1.7
type outer-guiding vertical-lift steel gas holder
vertical-lift gas holder composed of straight guide rails with outer guide rail frame and movable segments
2.1.8
type spiral steel gas holder
spirally lifted gas holder composed of movable segments welded on the wall of movable segments with spiral guide rails
2.1.9
single movable segments of gas holder
gas holder composed of a water tank and a movable segment (or segment for short)
2.1.10
multiple movable segments of gas holder
gas holder composed of a water tank and two or more movable segments
2.1.11
nominal volume of gas holder
rounded value of the total volume calculated by the available storage volumes in the movable segments of gas holder (rounded to 1 ~ 2 significant digits)
2.1.12
main components of gas holder
water tank, guide pulley, bell jar, medium segment (I, II and III), counterweight, guide rail and other component of type non-outer-guiding gas holder, type outer-guiding vertical-lift steel gas holder or type spiral steel gas holder
2.1.13
movable segments number of gas holder
number of movable segment constituting a gas holder for gas storage, which is expressed by “n”
2.1.14
segment clearance of gas holder
difference between the inner radii of two adjacent segments, which is expressed by “∆r”, that is, difference between the inner radii of the movable segment and the steel water tank of gas holder or difference between the inner radii of adjacent movable segments
2.2 Symbols
Ps——the design pressure of gas holder;
P——the operating pressure of gas holder;
P1, P2, …, Pn——the gas operating pressure when the bell jar and medium segments I, II, …, n are lifted (with the gravity of counterweight taken into account);
S0——the reference snow pressure in the area;
Sk——the characteristic value of snow load;
Wk——the characteristic value of wind load;
W0——the reference wind pressure in the area;
Ws——the dead weight of jar top;
D0, D1, D2, …, Dn——the inner diameter of water tank, bell jar and medium segments I, II, …, n of gas holder;
hj1——the maximum descending height of water column outside the lower ring after the movable segment is fully lifted;
hj2——the height allowance in case of movable segment inclination;
hj3——the height of lower ring backing plate;
∆h——the hydraulic gland allowance;
Hj——the hydraulic gland height of hydraulic gland ring;
Hj1——the height of upper ring sealing plate;
Hj2——the effective height of lower ring sealing plate;
Hj3——the allowance from the highest water level in the hydraulic gland to the top surface of ring;
Hj4——the distance from the overflow surface of tank to the top surface of water tank platform;
Hj5——the distance from the lower opening of upper ring sealing plate to the overflow port of water tank, where the movable segments descend onto the template beam, that is, the depth of upper ring sealing plate immersed in water;
C——the addition to thickness;
C1——the negative deviation of thickness;
C2——the corrosion allowance;
δi——the thickness of gas holder wall;
λ——the slenderness ratio of a member;
λz——the diameter-height ratio;
Φ——the welded joint coefficient.
Foreword ii
1 General provisions
2 Terms and symbols
2.1 Terms
2.2 Symbols
3 Basic requirements
3.1 Scope of gas holder
3.2 Qualification and obligation
3.3 Load
3.4 Thickness and size
3.5 Welded joint coefficient
3.6 Determination of pressure and temperature
4 Material
4.1 General requirement
4.2 Steel sheet
4.3 Steel pipe
4.4 Profile steel
4.5 Forged piece
4.6 Casting
4.7 Bolt, threaded stud and nut
4.8 Welding material
4.9 Allowable contact stress of guide pulley and guide rail
4.10 Allowable bend stress of guide pulley shaft
5 Basic parameter of construction
5.1 Diameter-height ratio
5.2 Confirmation on movable segments number of gas holder
5.3 Segment clearance
5.4 Relevant size of hydraulic gland ring
5.5 Water tank level
5.6 Safety hood immersion depth
5.7 Movable segment rising limit altitude
5.8 Available volume
6 Designed basic parameter
6.1 Working volume of gas holder
6.2 Operating pressure of gas holder
6.3 Relevant condition
6.4 Confirmation on type of gas holder
6.5 Gas holder design condition table
7 Basic constructional component design
7.1 Water tank base plate design
7.2 Water tank wall design
7.3 Water tank platform design
7.4 Bell jar top design
7.5 Movable segment wall plate design
7.6 Hydraulic gland ring design
7.7 Movable segment bottom ring design
7.8 Design for inside column of movable segment
7.9 Guide rail design
7.10 Guide pulley design
8 Accessory design
8.1 Gas conduit
8.2 Counterweight design
8.3 Nozzle and opening reinforcement
8.4 Water tank overflow device
8.5 Ladder, platform and railing
8.6 Sump and flush cleaning hole
8.7 Volume indication and volume control
8.8 Isolation trench design
8.9 Water make-up design
8.10 Antifreeze design
8.11 Lightning protection design
8.12 Flame trap
8.13 Setting of hydraulic gland for gas conduit
8.14 Requirements of basic design of gas holder
8.15 Corrosion-prevention design
9 Gas holder series
9.1 Volume specification series
9.2 Permissible load of gas holder series
9.3 Operating restriction condition of gas holder series
10 Gas holder selection
10.1 Gas holder volume confirmation
10.3 Gas holder permissible operating pressure : [P] confirmation
10.4 Design load
10.5 Relevant characteristics design of storage medium
10.6 Design of size and type of in-and-out gas pipe
10.7 Consideration on antifreeze scheme
10.8 Design of ground treatment and gas-holder foundation
10.9 Design of overflow device
10.10 Associated parts
11 Technical requirements for fabrication and inspection on gas holder
11.1 Member prefabrication
11.2 Prefabrication
11.3 Assembly and welding
11.4 Requirements for corrosion-prevention work
12 Technical requirements for acceptance of gas holders
12.1 Foundation acceptance
12.2 Quality inspection of welded joints during construction
12.3 Leak test of base plate
12.4 Water injection test
12.5 Inflation test
12.6 Indirect airtight inspection
12.7 Elevation and subsidence test
12.8 Overall acceptance of gas holder
13 Safe operation administration of gas holder
13.1 Air supply operation
13.2 Operation monitoring and control
13.3 Cut-off operation
13.4 Special working condition operation
Appendix A Wind load calculation
Appendix B Snow load calculation
Appendix C Gas holder seismic design
Appendix D Spherical arching design
Appendix E Calculation of guide pulley pressure
Appendix F The stability calculation of axial compression member and beam-columns
Appendix G Observation method of water tank foundation settlement
Appendix H Series of parameters of gas holder volume specifications
Explanation of wording in this code
List of quoted standards
Notification of the Ministry of Housing and Urban-Rural Development of the People's Republic of China
No. 776
Announcement of the Ministry of Housing and Urban-Rural Development of the People's Republic of China on publishing the national standard Technical code for fluid seal gas holder of industrial enterprises
Technical code for fluid seal gas holder of industrial enterprises has been approved as a national standard with a serial number of GB/T 51094-2015, and shall be implemented from November 1, 2015.
Authorized by the Research Institute of Standards and Norms of the Ministry of Housing and Urban-Rural Development of the People's Republic of China, this code is published and distributed by China Planning Press.
Ministry of Housing and Urban-Rural Development of the People's Republic of China
March 8, 2015
Foreword
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
According to the requirements of Document JIANBIAO [2011] No.7 issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China - Notice on printing and distributing the development plan on engineering construction national standards in 2011, this code is prepared by China Petroleum & Chemical Engineering Survey and Design Association and East China Engineering Science & Technology Co., Ltd. jointly with organizations concerned.
During the preparation process of this code, the drafting group, through extensive investigation based on code application specialty, summarization of practical experience over the years and consultation of relevant national and foreign standards, reviewed and finalized the code, on the basis of extensive consultation.
This code consists of 13 clauses and 8 appendices. The main technical contents include: general provisions, terms and symbols, basic requirements, material, basic parameter of construction, designed basic parameter, basic constructional component design, accessory design, gas holder series, gas holder selection, technical requirements for fabrication and inspection on gas holder, technical requirements for acceptance of gas holders, safe operation administration of gas holder, etc.
The Ministry of Housing and Urban-Rural Development of the People’s Republic of China is in charge of the administration of this code; the Branch of Chemical Engineering, China Association for Engineering Construction Standardization is responsible for the routine management; East China Engineering Science & Technology Co., Ltd. is responsible for the explanation of specific technical contents. In case of any opinion and suggestion in the process of implementing this code, please send a mail to East China Engineering Science & Technology Co., Ltd. (Address: No. 70 Wangjiang East Road, Hefei, Anhui, 230024, China) for reference in future revision.
Technical code for fluid seal gas holder of industrial enterprises
1 General provisions
1.0.1 This code is developed with a view to effective management of low-pressure steel fluid seal gas holders for gas storage in industrial enterprises [hereinafter referred to as the “gas holder(s)”] and to ensuring scientific design, economic rationality and safe operation of gas holders in engineering.
1.0.2 This code is applicable to low-pressure steel fluid seal gas holders of industrial enterprises, and other gas holders for gas storage that meet all of the following conditions;
1 The steel fluid seal gas holders have a design pressure less than or equal to 4,000 Pa and larger than the pressure from the dead weight of lifting part of gas holder;
2 The steel fluid seal gas holders have a nominal volume of 50 m3 ~ 100,000 m3;
3 The steel fluid seal gas holders are used for storage, buffering, pressure regulation and mixing in the installation of chemical industry, petrochemical industry, municipal gas service and biochemical engineering, etc.
1.0.3 This code is not applicable to low-pressure steel fluid seal gas holders containing an extremely or highly hazardous medium that is soluble in water.
1.0.4 In addition to those specified in this code, the design, fabrication, inspection and safe operation administration of low-pressure steel fluid seal gas holders shall also meet the requirements of the current relevant standards of the nation.
2 Terms and symbols
2.1 Terms
2.1.1
pressure
pressure generated by the compression of gas stored in gas holder, which, unless otherwise indicated, refers to gauge pressure
2.1.2
operating pressure
gas storage pressure generated by the dead weight of movable segment structure of gas holder piston structure (including the counterweight); for multiple movable segments of gas holder, indicate the operating pressure where the bell jar is lifted and the ones where other movable segments are lifted
2.1.3
design pressure
maximum operating pressure generated during the operation of gas holder
2.1.4
calculating pressure
pressure used for determining the calculating thickness of each part or each component of gas holder
2.1.5
design temperature
mental temperature set for wall plates and pressure components of gas holder in normal use
2.1.6
type non-outer-guiding gas holder
vertical-lift gas holder composed of movable segments welded on the wall of movable segments with straight guide rails
2.1.7
type outer-guiding vertical-lift steel gas holder
vertical-lift gas holder composed of straight guide rails with outer guide rail frame and movable segments
2.1.8
type spiral steel gas holder
spirally lifted gas holder composed of movable segments welded on the wall of movable segments with spiral guide rails
2.1.9
single movable segments of gas holder
gas holder composed of a water tank and a movable segment (or segment for short)
2.1.10
multiple movable segments of gas holder
gas holder composed of a water tank and two or more movable segments
2.1.11
nominal volume of gas holder
rounded value of the total volume calculated by the available storage volumes in the movable segments of gas holder (rounded to 1 ~ 2 significant digits)
2.1.12
main components of gas holder
water tank, guide pulley, bell jar, medium segment (I, II and III), counterweight, guide rail and other component of type non-outer-guiding gas holder, type outer-guiding vertical-lift steel gas holder or type spiral steel gas holder
2.1.13
movable segments number of gas holder
number of movable segment constituting a gas holder for gas storage, which is expressed by “n”
2.1.14
segment clearance of gas holder
difference between the inner radii of two adjacent segments, which is expressed by “∆r”, that is, difference between the inner radii of the movable segment and the steel water tank of gas holder or difference between the inner radii of adjacent movable segments
2.2 Symbols
Ps——the design pressure of gas holder;
P——the operating pressure of gas holder;
P1, P2, …, Pn——the gas operating pressure when the bell jar and medium segments I, II, …, n are lifted (with the gravity of counterweight taken into account);
S0——the reference snow pressure in the area;
Sk——the characteristic value of snow load;
Wk——the characteristic value of wind load;
W0——the reference wind pressure in the area;
Ws——the dead weight of jar top;
D0, D1, D2, …, Dn——the inner diameter of water tank, bell jar and medium segments I, II, …, n of gas holder;
hj1——the maximum descending height of water column outside the lower ring after the movable segment is fully lifted;
hj2——the height allowance in case of movable segment inclination;
hj3——the height of lower ring backing plate;
∆h——the hydraulic gland allowance;
Hj——the hydraulic gland height of hydraulic gland ring;
Hj1——the height of upper ring sealing plate;
Hj2——the effective height of lower ring sealing plate;
Hj3——the allowance from the highest water level in the hydraulic gland to the top surface of ring;
Hj4——the distance from the overflow surface of tank to the top surface of water tank platform;
Hj5——the distance from the lower opening of upper ring sealing plate to the overflow port of water tank, where the movable segments descend onto the template beam, that is, the depth of upper ring sealing plate immersed in water;
C——the addition to thickness;
C1——the negative deviation of thickness;
C2——the corrosion allowance;
δi——the thickness of gas holder wall;
λ——the slenderness ratio of a member;
λz——the diameter-height ratio;
Φ——the welded joint coefficient.
Contents of GB/T 51094-2015
Foreword ii
1 General provisions
2 Terms and symbols
2.1 Terms
2.2 Symbols
3 Basic requirements
3.1 Scope of gas holder
3.2 Qualification and obligation
3.3 Load
3.4 Thickness and size
3.5 Welded joint coefficient
3.6 Determination of pressure and temperature
4 Material
4.1 General requirement
4.2 Steel sheet
4.3 Steel pipe
4.4 Profile steel
4.5 Forged piece
4.6 Casting
4.7 Bolt, threaded stud and nut
4.8 Welding material
4.9 Allowable contact stress of guide pulley and guide rail
4.10 Allowable bend stress of guide pulley shaft
5 Basic parameter of construction
5.1 Diameter-height ratio
5.2 Confirmation on movable segments number of gas holder
5.3 Segment clearance
5.4 Relevant size of hydraulic gland ring
5.5 Water tank level
5.6 Safety hood immersion depth
5.7 Movable segment rising limit altitude
5.8 Available volume
6 Designed basic parameter
6.1 Working volume of gas holder
6.2 Operating pressure of gas holder
6.3 Relevant condition
6.4 Confirmation on type of gas holder
6.5 Gas holder design condition table
7 Basic constructional component design
7.1 Water tank base plate design
7.2 Water tank wall design
7.3 Water tank platform design
7.4 Bell jar top design
7.5 Movable segment wall plate design
7.6 Hydraulic gland ring design
7.7 Movable segment bottom ring design
7.8 Design for inside column of movable segment
7.9 Guide rail design
7.10 Guide pulley design
8 Accessory design
8.1 Gas conduit
8.2 Counterweight design
8.3 Nozzle and opening reinforcement
8.4 Water tank overflow device
8.5 Ladder, platform and railing
8.6 Sump and flush cleaning hole
8.7 Volume indication and volume control
8.8 Isolation trench design
8.9 Water make-up design
8.10 Antifreeze design
8.11 Lightning protection design
8.12 Flame trap
8.13 Setting of hydraulic gland for gas conduit
8.14 Requirements of basic design of gas holder
8.15 Corrosion-prevention design
9 Gas holder series
9.1 Volume specification series
9.2 Permissible load of gas holder series
9.3 Operating restriction condition of gas holder series
10 Gas holder selection
10.1 Gas holder volume confirmation
10.3 Gas holder permissible operating pressure : [P] confirmation
10.4 Design load
10.5 Relevant characteristics design of storage medium
10.6 Design of size and type of in-and-out gas pipe
10.7 Consideration on antifreeze scheme
10.8 Design of ground treatment and gas-holder foundation
10.9 Design of overflow device
10.10 Associated parts
11 Technical requirements for fabrication and inspection on gas holder
11.1 Member prefabrication
11.2 Prefabrication
11.3 Assembly and welding
11.4 Requirements for corrosion-prevention work
12 Technical requirements for acceptance of gas holders
12.1 Foundation acceptance
12.2 Quality inspection of welded joints during construction
12.3 Leak test of base plate
12.4 Water injection test
12.5 Inflation test
12.6 Indirect airtight inspection
12.7 Elevation and subsidence test
12.8 Overall acceptance of gas holder
13 Safe operation administration of gas holder
13.1 Air supply operation
13.2 Operation monitoring and control
13.3 Cut-off operation
13.4 Special working condition operation
Appendix A Wind load calculation
Appendix B Snow load calculation
Appendix C Gas holder seismic design
Appendix D Spherical arching design
Appendix E Calculation of guide pulley pressure
Appendix F The stability calculation of axial compression member and beam-columns
Appendix G Observation method of water tank foundation settlement
Appendix H Series of parameters of gas holder volume specifications
Explanation of wording in this code
List of quoted standards
