Standard No.:	GB/T 29465-2023
English Name:	Flange of floating heat exchangers
Chinese Name:	浮头式热交换器用法兰
Chinese Classification:	G91    Chemical machinery and equipment parts
Professional Classification:	GB    National Standard
ICS Classification:	23.040.60 23.040.60    Flanges, couplings and joints 23.040.60
Issued by:	SAMR; SAC
Issued on:	2023-9-7
Implemented on:	2023-9-7
Status:	valid
Superseding:	GB/T 29465-2012 Shell flange-rear head end of floating heat exchangers
Language:	English
File Format:	PDF
Word Count:	9500 words
Price(USD):	285.0
Delivery:	via email in 1 business day

Flange of floating heat exchangers 1 Scope This document specifies the type, code and basic parameters of shell flange-rear head ends and shell cover flanges of floating heat exchangers. This document is applicable to carbon steel and low-alloy steel flanges with nominal pressure of 0.6 MPa to 6.4 MPa, operating temperature of -40°C to 450°C, and corrosion margin of no more than 3 mm. 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 151 Heat exchangers GB/T 29463 (all parts) Gaskets used in tube-shell heat exchangers NB/T 47020-2012 Type and specification for pressure vessel flanges NB/T 47023-2012 Welding neck flange NB/T 47024 Nonmetallic gaskets NB/T 47025 Spiral wound gaskets NB/T 47026 Double jacketed gaskets NB/T 47027 Stud blots & nuts for body flange 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 151 apply. 4 Symbols For the purposes of this standard, the symbols given in Table 1 apply.   Table 1 Description of symbols Symbol Name Symbol Name a Width of groove sealing face D4 Outer diameter of male sealing face, tenon sealing face a1 Width of tenon sealing face H Flange height D Outside diameter of flange h Flange neck height d Diameter of bolt hole R Flange neck rounded corner DN Nominal diameter of flange δ Flange thickness D1 Diameter of bolt center circle δ0 Minimum thickness of butt cylinder D2 Outer diameter of female sealing face, groove sealing face male part δ1 Thickness of small end of flange neck D3 Outer diameter of flat sealing face, female sealing face and groove sealing face δ2 Thickness of large end of flange neck 5 Type of construction 5.1 Structure type of shell flange-rear head end The structural type of shell flange-rear head end of flat sealing face is shown in Figure 1; the structural type of shell flange-rear head end of male sealing face is shown in Figure 2; the structural type of shell flange-rear head end of tenon sealing face is shown in Figure 3; the structural type of shell flange-rear head end of bush-ring flat sealing face is shown in Figure 4; the structural type of shell flange-rear head end of the bush-ring male sealing face is shown in Figure 5; the structural type of shell flange-rear head end of the bush-ring tenon sealing face is shown in Figure 6. 5.2 Structure type of shell cover flange The structural type of shell cover flange of flat sealing face is shown in Figure 1; the structural type of shell cover flange of female sealing face is shown in Figure 7; the structural type of shell cover flange of groove sealing face is shown in Figure 8; the structural type of shell cover flange of bush-ring flat sealing face is shown in Figure 4; the structural type of shell cover flange of the bush-ring female sealing face is shown in Figure 9; the structural type of shell cover flange of the bush-ring groove sealing face is shown in Figure 10.   Dimensions in millimeters Dimensions in millimeters

Foreword II Introduction III 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols 5 Type of construction 6 Code and designation 7 Selection rules 8 Basic parameters