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This standard is revised based on the original professional standard HG/T 21574-2008 Chemical equipment lifting lugs and engineering technical specification in accordance with the requirements of Plan for the development and revision of the second batch of professional standards in 2015 (GONGXINTINGKE [2015], No. 429) issued by the General Office of the Ministry of Industry and Information Technology. China Petroleum & Chemical Engineering Survey and Design Association is the chief editor department, the Equipment Design Professional Committee/National Chemical Equipment Design Center Station is entrusted to be responsible for the organization, and China Chengda Engineering Co., Ltd. is the chief drafting organization.
This standard replaces HG/T 21574-2008 Chemical equipment lifting lugs and engineering technical specification from the implementation date hereof.
This revision is based on HG/T 21574-2008 Chemical equipment lifting lugs and engineering technical specification, according to the experience gained since its implementation, extensively solicited opinions, combined with the changes of relevant standards.
This standard consists of 11 clauses and 5 annexes.
The following main changes have been made with respect to HG/T 21574-2008 Chemical equipment lifting lugs and engineering technical specification:
1. The standard name has been changed from Chemical equipment lifting lugs and engineering technical specification to Standard for design and selection of chemical equipment lifting lugs;
2. The clause “application scope” is revised and merged into the clause “general provisions”;
3. The terms and symbols clauses are added;
4. The applicable nominal lifting weight scope of lifting lugs is expanded;
5. The total factor is adjusted;
6. The strength calculation of lifting lug body structure is added.
7. The application scope of materials with minimum thickness is added;
8. The calculation and check of stress bearing during equipment lifting are added.
The Ministry of Industry and Information Technology is in charge of the administration of this standard; China Petroleum & Chemical Engineering Survey and Design Association are responsible for the routine management; and China Chengda Engineering Co., Ltd. is responsible for the explanation of specific technical contents. In case of any comment and suggestion during the process of implementing this standard, please contact China Chengda Engineering Co., Ltd. (address: No. 279 Chengda building, middle section of Tianfu Avenue, Chengdu, Sichuan Province; Postal code: 610041; Tel: 0086-(0)28-65531953; Fax: 028-65530000) for future reference in revision.
Standard for design and selection of chemical equipment lifting lugs
1 General
1.0.1 This standard is specially formulated to ensure the safety of chemical equipment during hoisting and to design and select lifting lugs reasonably.
1.0.2 This standard is applicable to material selection, design, manufacture, inspection and acceptance of lifting lugs for steel chemical equipment and its components during equipment lifting.
1.0.3 This standard specifies the classification, type code, dimension, material, technical requirements of lifting lugs for lifting chemical equipment or its components, and the check and calculation of lifting lugs body and chemical equipment during hoisting.
1.0.4 In addition to this standard, the material selection, design, manufacture, inspection and acceptance of chemical equipment lifting lugs shall also meet the requirements in the current relevant national standards.
2 Terms and symbols
2.1 Terms
2.1.1
lifting lug
parts such as lifting ropes and hooks welded to the equipment for fixing and lifting equipment
2.1.2
top head lug
lifting lug that is welded on top seal head of vertical equipment and made of steel plate
2.1.3
horizontal vessel lug
lifting lug that is welded to the cylindrical section of horizontal equipment and made of steel plate
2.1.4
side plate-type lug
lifting lug that is welded on upper part and top seal head of cylindrical section of vertical equipment and made of steel plate
2.1.5
trunnion
lifting lug that is welded to the cylindrical section of equipment and made of steel pipes or coiled steel plates
2.1.6
tailing lug
lifting lug that is welded to the lower part of vertical equipment and made of steel plates
2.1.7
hoisting
operation procedure in which equipment is lifted and installed at the specified position under the action of hoisting machinery
2.1.8
nominal lifting capability
maximum lifting weight (in t) allowed by a single lifting lug during hoisting lug design or selection
2.1.9
lifting weight of equipment
maximum weight of equipment during hoisting, including the weight of accessories lifted with the equipment, such as ladders, platforms, insulation and auxiliary pipelines, etc.
2.1.10
impact factor
ratio of dynamic load to static load considered during hoisting
2.1.11
unbalance factor
unevenness of load distribution among the lifting lugs considered during hoisting
2.1.12
total factor
amplification coefficient relative to static load determined by comprehensively determining dynamic load, unbalance and other influencing factors during lifting lug strength check, the value of which shall not be less than the product of unbalance factor and dynamic load factor
2.1.13
pad eye
circular plate welded on both sides of the lifting hole for reinforcement
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2.1.14
shackle
combination formed by assembling buckle and pin shaft
2.1.15
pin
circular section pin in conjunction with buckle
2.1.16
sling angle
included angle between the sling and the vertical direction during hoisting, for the plate-type lug, this standard only considers the case that the sling is in the plane of the lifting lug plate
2.1.17
rifting angle
included angle between the equipment axis and the horizontal direction during hoisting, generally taking 0° when the equipment is in a horizontal state and 90° when the equipment is in a vertical state
2.2 Symbols
2.2.1 Geometrical characteristics
D——the diameter of plate-type lug hole, mm;
D0——the outer diameter of trunnion pipe axis, mm.
D1——the outer diameter of pad eye mm;
dr——the diameter of pin, mm;
h——the calculated thickness of fillet weld, when there is a backing plate, take the smaller of 0.56S1 and 0.7δ. When there is no backing plate, take 0.7δ, mm;
n——the number of lifting lugs, pcs;
S——the thickness of plate-type lug or trunnion pipe axis, mm;
S1——the thickness of backing plates, mm;
S2——the thickness of pad eye, mm;
W——the effective weight (equal to WL/n) of single lifting lug design, kg;
Wn——the nominal lifting capability, ×103kg;
WL——the lifting weight of equipment, kg;
α——the sling field angle, the included angle between sling and vertical direction, °;
δ——the negative deviation of results obtained thorough nominal thickness of the seal head or cylindrical section at the lifting lug minus the thickness of material, mm; θ——the rifting angle (°) included between equipment axis and horizontal direction.
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2.2.2 Loads, material and the like
E——the elastic modulus of lifting lugs material, MPa;
Fh——the transverse calculated load, N;
FL——the calculation load of sling N;
Fv——the vertical calculated load, N;
g——the gravitational acceleration, m/s2;
K——the total factor of hoisting;
Kd——the impact factor, taking 1.2;
Ku——the unbalance factor, taking 1.125;
ReL——the typical yield strength at room temperature of metallic material, MPa;
v——the poisson's ratio of lifting lugs material, taking 0.3;
σhz——the maximum compressive stress at the lifting hole, MPa;
[σ]——the allowable tensile stress of lifting lugs material, taking ReL/1.6, MPa;
[σhz]——the allowable compressive stress of lifting lugs material, taking 2ReL, MPa;
[ ]——the allowable shear stress of lifting lug material, taking 0.6[σ], MPa;
[σe]——the allowable tensile stress of equipment material, MPa;
[ ]——the allowable shear stress of equipment material, MPa;
Φa——the fillet weld coefficient, taking 0.7.
3 Classification and layout for lifting lugs
3.1 Classification for lifting lugs
3.1.1 This standard contains the following five types of lifting lugs:
1 Top head lug (Types TPA and TPB);
2 Horizontal vessel lug (Type HP);
3 Side plate-type lug (Type SP);
4 Trunnion (Types AXA, AXB and AXC);
5 Tailing lug (Types APA and APB).
3.1.2 See Table 3.1.2 for the classification, diagrams and codes of various lifting lugs.
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Table 3.1.2 Classification, diagrams and codes of lifting lugs
Type Type code Diagram of lifting lug Type code
Top head lug
TP TPA
TPB
Horizontal vessel lug
HP HP
Side plate-type lug SP SP
Trunnion AX AXA
AXB
AXC
Tailing lug AP APA
APB
3.2 Layout for lifting lugs
3.2.1 Layout of top head lug
1 Two top head lugs should be symmetrically installed on the elliptical head, dish head, spherical head without folded edge or hemispherical head at the top of the vertical equipment, Under special circumstances, the number of lifting lugs shall be more than 2. For elliptical head and dish head, the position of the lifting lug shall be adjusted according to actual needs, but the centerline of the lifting lug should be located within the range of 0.7 times the diameter of the head. When TP-type lifting lugs are arranged on the flat head or conical head at the top of the equipment, the strength of the head shall be checked according to the load of the lifting lugs.
2 The layout of the top head lug is shown in Figure 3.2.1.
Type I Type II
Figure 3.2.1 Layout of top head lug
3.2.2 The layout of horizontal vessel lug is shown in Figure 3.2.2.
Type I
Type II
Type III
Figure 3.2.2 Layout of horizontal vessel lug
3.2.3 Side plate-type lug shall be symmetrically arranged at the top of the cylinder, and the layout is shown in Figure 3.2.3.
Figure 3.2.3 Layout of side plate-type lug
3.2.4 The trunnion shall be arranged above the center of gravity of the equipment. Such factors as equipment and ancillary structure, equipment stress during hoisting and lifting space shall be considered for the specific location. The typical layout is shown in Figure 3.2.4.
Figure 3.2.4 Layout of trunnion
3.2.5 The layout of tailing lug should meet the following requirements:
1 The tailing lug should be installed at the bottom of the skirt, and the end of the lifting lug shall be welded on the shell of the skirt, and when the cover plate of the anchor bolt seat is divided into blocks or those without a plate, the lower edge shall be welded on the base ring plate; when the cover plate of the anchor bolt seat is a complete circle, the tailing lug should be placed between the cover plate and the base ring plate, the upper and lower edges shall be welded to the cover plate and the base ring plate respectively. If due to structural restrictions, the tailing lugs may be placed at other position, and the typical layout is shown in Figure 3.2.5.
Figure 3.2.5 Layout of tailing lug
2 When the distance between the cover plate and the base ring plate is greater than H, H may be increased so that the lifting lug shall be welded to the cover plate and the base ring plate;
Note: see Figure 11.0.1 for H and L.
3 APA- or APB-type should be selected for the tailing lugs according to the nominal lifting weight, and located in the center of the lifting lug of the two upper equipment.
4 Application scope and selection principle for lifting lug
4.1 Application scope for lifting lugs
4.1.1 See Table 4.1.1-1 for the application scope of lifting lugs. See Table 4.1.1-2, Table 4.1.1-3 and Table 4.1.1-4 for the direct selection of the minimum thickness required for the shell.
Foreword i
1 General
2 Terms and symbols
2.1 Terms
2.2 Symbols
3 Classification and layout for lifting lugs
3.1 Classification for lifting lugs
3.2 Layout for lifting lugs
4 Application scope and selection principle for lifting lug
4.1 Application scope for lifting lugs
4.2 General procedures for selecting lifting lugs
5 Technical requirements
5.1 Design
5.2 Material
5.3 Manufacture
5.4 Inspection and acceptance
6 Mark
7 Top head lug
8 Horizontal vessel lug
9 Side plate-type lug
10 Trunnion
11 Tailing lug
Annex A Design of lifting lugs
A.1 Top head lug
A.2 Side plate-type lug
A.3 Horizontal vessel lug
A.4 Trunnion
A.5 Tailing lug
Annex B Requirements of minimum thickness
B.1 Use principles
B.2 Selection of top head lug and minimum thickness requirement of seal head
B.3 Selection of horizontal vessel lug and minimum thickness requirement of cylindrical section
B.4 Selection of trunnion and minimum thickness requirement of cylindrical section
Annex C Calculation and check of stress bearing during equipment hoisting
C.1 Equipment hoisting load
C.2 Bending moment of equipment section
Annex D Inner ring bracing type and check of equipment skirt
D.1 Inner ring bracing type of equipment skirt
D.2 Inner ring bracing check of equipment skirt
Annex E Lifting lug for parts and components
E.1 Type code
E.2 Technical requirements
E.3 Structural style
E.4 Dimension series
E.5 Weight
E.6 Marking
Explanation of wording in this standard
List of quoted standards
