Standard No.:	HG/T 21574-2018
English Name:	Standard for design and selection of chemical equipment lifting lugs
Chinese Name:	化工设备吊耳设计选用规范
Professional Classification:	HG    Professional Standard - Chemistry
Issued on:	2018-04-30
Implemented on:	2018-9-1
Status:	valid
Superseding:	HG/T 21574-2008 Chemical equipment lifting lugs and engineering technical specification
Language:	English
File Format:	PDF
Word Count:	62500 words
Price(USD):	1875.0
Delivery:	via email in 1 business day

HG/T 21574-2018 Standard for design and selection of chemical equipment lifting lugs English 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   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.   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;

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