NB/T 47065-2018 consists of the following five parts under the general title Vessel support:
——Part 1: Saddle support (NB/T 47065.1-2018);
——Part 2: Leg support (NB/T 47065.2-2018);
——Part 3: Lug support (NB/T 47065.3-2018);
——Part 4: Bracket support (NB/T 47065.4-2018);
——Part 5: Support lugs with rigid rings (NB/T 47065.5-2018).
This is Part 3 "Lug support" of NB/T 47065-2018.
Vessel support - Part 3: Lug support
1 Scope
1.1 This part specifies the structural types, series parameters and dimensions, materials, designations, manufacturing technical requirements, and selection instructions for lug supports.
1.2 This part is applicable to:
a) Vertical cylindrical vessels with a nominal diameter of not greater than 4,000mm;
b) Vessels with an allowable service temperature range of -100℃ to 300℃.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 985.1 Recommended joint preparation for gas welding, manual metal arc welding, gas-shield arc welding and beam welding
GB/T 1804 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications
NB/T 47013.1 Nondestructive testing of pressure equipments - Part 1: General requirements
NB/T 47013.4 Nondestructive testing of pressure equipments - Part 4: Magnetic particle testing
NB/T 47013.5 Nondestructive testing of pressure equipments - Part 5: Penetrant testing
NB/T 47015 Welding specification for pressure vessels
3 Type characteristics
The type characteristics of lug supports are shown in Table 1.
Table 1 Type characteristics
Type Support No. Backing plate Cover plate Applicable nominal diameter, DN/mm Support dimensions (see figure and table)
Short arm A 1~5 Yes No 300~2,600 Figure 1 and Table 2
6~8 Yes 1,500~4,000 Figure 2 and Table 2
Long arm B 1~5 Yes No 300~2,600 Figure 3 and Table 3
6~8 Yes 1,500~4,000 Figure 4 and Table 3
Extension arm C 1~3 Yes Yes 300~1,400 Figure 5 and Table 4
4~8 1,000~4,000 Figure 6 and Table 4
4 Series parameters and dimensions
4.1 Type A lug supports shall comply with the requirements of Figure 1, Figure 2, and Table 2; Type B lug supports shall comply with the requirements of Figure 3, Figure 4, and Table 3; Type C lug supports shall comply with the requirements of Figure 5, Figure 6, and Table 4.
4.2 The thickness of the backing plate for the supports shall meet the requirements specified in this part. Generally, it shall be equal to the thickness of the cylinder, but the thickness may also be increased according to actual needs.
6 Designations
6.1 Designation methods
Note 1: If the backing plate thickness δ3 is different from some dimensions, it shall be noted in the part name or remarks column of the equipment drawing.
Note 2: The materials of support and backing plate shall be noted in the material column of the equipment drawing, with the notation method as follows: support material/backing plate material.
6.2 Designation examples
Example 1: Type A, No.3 lug support, with support material Q235B and backing plate material Q245R:
NB/T 47065.3-2018, lug support A3-I
Foreword II
1 Scope
2 Normative references
3 Type characteristics
4 Series parameters and dimensions
5 Materials
6 Designations
7 Manufacturing technical requirements
8 Selection instructions
Annex A (Informative) Approximate calculation of the actual load borne by lug supports
Annex B (Informative) Allowable bending moment for supports limited by the vessel shells
Annex C (Informative) Installation dimensions of lug supports
