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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 1 of NB/T 47065-2018: Saddle support.
This part is developed in accordance with the rules given in GB/T 1.1-2009 Directives for standardization - Part 1: Structure and drafting of standards.
This part replaces JB/T 4712.1-2007 Vessel support - Part 1: Saddle support. The following main technical changes have been made with respect to JB/T 4712.1-2007:
——The design basis of this part is the relevant requirements in NB/T 47042-2014 Horizontal Vessel;
——The upper diameter limit of saddle support is expanded to DN6 000mm according to GB/T 9019-2015 Nominal diameter of pressure vessels, and a saddle support series in diameter of DN4 100mm to DN6 000mm is added, including light saddle supports, heavy saddle supports and saddle supports with 150° angle of contact.
——The dimensions of backing plate, base plate and corresponding rib plate are calculated and adjusted;
——The materials of saddle supports are adjusted to Q235B, Q345B and Q345R;
——The service temperature of saddle support is adjusted to “may be used at conditions of -40℃~200℃”, and when the service temperature is lower than -40℃, the way of material selection is also given;
——The limit of seismic fortification intensity of degree 8 in JB/T 4712.1-2007 is cancelled.
This part was proposed by and is under the jurisdiction of the National Technical Committee on Boilers and Pressure Vessels of Standardization Administration of China (SAC/TC 262).
This part is drafted by the Design Branch of National Technical Committee on Boilers and Pressure Vessels of Standardization Administration of China.
This part is interpreted by the National Technical Committee on Boilers and Pressure Vessels of Standardization Administration of China (SAC/TC 262).
The previous editions of this part are as follows:
——JB/T 4712-1992;
——JB/T 4712.1-2007.
Vessel support - Part 1: Saddle support
1 Scope
1.1 This part specifies the type characteristics, series parameters and dimensions, materials, marking, manufacturing technical requirements and selection methods of saddle supports.
1.2 It is applicable to saddle supports of steel horizontal vessels supported by double fulcrums. For saddle supports of horizontal vessels supported by multiple fulcrums, their structural types and dimensions may also be used with reference to this standard.
1.3 Design conditions of saddle support in this part:
Design temperature of saddle supports:-40℃~200℃.
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
3 Type characteristics
Saddle supports are divided into two types: light (code A) and heavy (code B).
Heavy saddle supports are divided into five models according to their manufacturing methods, angle of contact and attached backing plates. See Table 1 for the structural characteristics of various models of saddle supports.
Saddle supports are divided into stationary (code F) and sliding (code S) ones according to their installation forms.
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Table 1 Type characteristics
Type Angle of contact Backing plate Number of rib plates Applicable nominal diameter DN/mm Support dimension (see the tables and figures)
Light Welding A 120° With 4 1 000~2 000 Figure 1 and Table 2
6 2 100~4 000 Figure 2 and Table 3
4 100~6 000 Figure 3 and Table 4
Heavy Welding BI 120° With 1 168~406 Figure 4 and Table 5
300~450 Figure 4 and Table 6
2 500~950 Figure 5 and Table 7
4 1 000~2 000 Figure 6 and Table 8
6 2 100~4 000 Figure 7 and Table 9
4 100~6 000 Figure 8 and Table 10
BII 150° With 4 1 000~2 000 Figure 9 and Table 11
6 2 100~4 000 Figure 10 and Table 12
4 100~6 000 Figure 11 and Table 13
BIII 120° Without 1 168~406 Figure 4 and Table 5
300~450 Figure 4 and Table 6
2 500~950 Figure 5 and Table 7
Bending BIV 120° With 1 168~406 Figure 4 and Table 5
300~450 Figure 4 and Table 6
2 500~950 Figure 5 and Table 7
BV 120° Without 1 168~406 Figure 4 and Table 5
300~450 Figure 4 and Table 6
2 500~950 Figure 5 and Table 7
4 Series parameters and dimensions
4.1 Light (Type A) saddle support
4.1.1 The structure and dimension of DN1 000mm to DN2 000mm light saddle support with angle of contact of 120°and backing plate shall be in accordance with those specified in Figure 1 and Table 2.
Foreword i
1 Scope
2 Normative references
3 Type characteristics
4 Series parameters and dimensions
5 Materials
6 Marking
7 Manufacturing technical requirements
8 Selection method
Annex A (Informative) Allowable load of saddle support exceeding standard height
Annex B (Informative) Screw hole length of sliding saddle support
Annex C (Informative) Backing plate dimension of saddle support
