This standard specifies the structural type, size, technical requirements and selection regulations of the light-transmitting glass tube liquid level gauge with a nominal pressure of 1.6MPa. HG 21592-1995 Glass tube liquid level gauge standard series and technical requirements (PN1.6) HG21592-1995 standard download decompression password: www.bzxz.net

Glass tube liquid level gauge standard series and
Technical requirements
HG21592--95
1 Subject content and scope of application
This standard specifies the structural type, size, technical requirements, marking method and selection regulations of glass tube liquid level gauges with a nominal pressure of 1.6MPa. 1.0.2 This standard applies to glass tube liquid level gauges used for equipment liquid level indication in the chemical industry with a nominal pressure of 1.6MPa and an operating temperature of 0~200℃. The corrosion margin in this standard is as specified in Table 1.0.2. Table 1.0.2 Corrosion allowance
Material code
Carbon steel I
Stainless steel straight
Corrosion allowance
GB1220
GB3077
GB3323
GB3880
GB4237
GB6654
GB1527
GB5231
GB1804
GB3985
GB 6170
GB7306
JB/T4709
JB2536
Cited Standards
《Steel Pressure Vessels》
《Technical Conditions for High-Quality Carbon Structural Steel》
《Carbon Structural Steel》
《Stainless Steel Bars》
《Technical Conditions for Alloy Structural Steel》
《Radiography and Quality Classification of Steel Fusion Welded Butt Joints》
《Stainless Steel Hot-Rolled Plates》
《Carbon Steel and Low-Alloy Steel Thick Plates for Pressure Vessels》
《Drawn Copper Tubes》
《 Processing copper - chemical composition and product shape "Slotted cylindrical head screw"
"Standard spring washer"
"Basic dimensions of ordinary threads"
"Selection and marking of ordinary thread tolerance zone" "Steel ball"
"Limit deviation of unmarked tolerance size"
"Asbestos rubber sheet"
"Mechanical drawing font"
"Type 1 hexagonal nut grade A and grade B"
"Pipe thread sealed with thread"
"Welding code for steel pressure vessels"
"Painting, packaging and transportation of pressure vessels" JB1692
HGJ 223
ANSI B16. 5
《Umbrella-shaped hand wheel》
《Product label》
《Rubber asbestos packing》
《Glass plate and glass tube for liquid level gauge》
《Technical specification for welding and brazing of copper and copper alloys》
《Slip-on steel pipe flange with raised face and neck》
《Slip-on steel flange with concave and convex face and neck》
《Pipe flange and flange fittings》
3 Structural types, basic parameters and dimensions
3.0.1 This standard The structural types are "ordinary type" and "insulation type". The basic parameters and dimensions are shown in Table 3.0.1 and Figure 3.0.1.
Nominal length
Basic parameters and dimensions of glass tube liquid level gauge (PN1.6)"
Li (mm)
Heating steam pipe
Interface spacing
L2 (mm)
Ordinary type
*The light transmission length in this standard is the actual length of the indicator ruler. 3. 0.2
Insulation type
Glass tube is recommended according to QB776-80 "Glass plate and glass tube for liquid level gauge". Model, code
Glass tube type.
2 Code
1 Flange type code:
- Raised face flange (RF), according to HGJ46 standard:- Raised face flange (M), according to HGJ47 standard: C type-
- Raised face flange (RF), according to ANSIB16.5 standard SO2) Material code
I- Carbon steel (forged steel 16Mn);
Straight- Stainless steel (0Cr18Ni9).
3) Structural type code:
Ordinary type is not marked;
Insulation type-W.
3.0.4 Marking regulations
Marking description:
Liquid level gauge port
□xx
2 Marking example:
Nominal length
Structural type bar
Ordinary type not marked
Insulation type marked with W
Material code I, sub
Nominal pressure
Model G
Flange type code ABC
Example 1: A glass tube liquid level gauge with a nominal pressure of 1.6MPa, carbon steel material, insulation type, flange standard HGJ46, and a nominal length of L-500mm is marked as: Liquid level gauge AG1.6-1W--5 00
Example 2: The glass tube liquid level gauge with nominal pressure of 1.6MPa, stainless steel material, ordinary type, flange standard HGI47, and nominal length L=1400mm is marked as: Liquid level gauge BG1:6-1—1400
uiihihnn
13.0.1 (Continued)
Structural diagram of glass tube liquid level gauge
Steam pipe connection
4 Technical requirements
4.0.1 All materials used to manufacture liquid level gauges must have a quality certificate. In addition to complying with the material standards prescribed by the state, the materials used must also comply with the requirements of this standard and drawings.
4.0.2 The glass tube material in this standard is tempered borosilicate glass, and the heat-resistant temperature difference of the glass tube is 180℃. The glass tube is in accordance with QB776-80 "Glass Plate and Glass Tube for Liquid Level Gauge" standard.
4.0.3 The main body of the liquid level gauge is made of I (carbon steel) and ear (stainless steel) materials. The gasket material is asbestos rubber sheet. 4.0.4 The allowable deviation requirements of the size between the upper and lower flanges of the liquid level gauge are as follows: 1 The sealing surfaces of the two flanges should be in the same vertical plane, and the verticality allowable deviation should be less than 1mm.
2 The allowable deviation of the vertical line passing through the center of the two flange sealing surfaces should be less than 1.5mm.
3 The allowable deviation of the center distance of the two flanges should be ±1.5mm. 4. 0. 5
The automatic closing pressure of the needle valve steel ball of the liquid level gauge is 0.2MPa. The insulation type adopts steam heating, and the steam pressure is less than or equal to 0.6MPa. Water pressure test
After the liquid level gauge is manufactured, it should be subjected to a water pressure test at 1.5 times the nominal pressure of the liquid level gauge, and the pressure test requirements should comply with the provisions of GB150. 4.0.8 Air tightness test
If the design requires otherwise, an air tightness test shall be carried out after the water pressure test is passed. The test pressure shall be 1.05 times the nominal pressure of the liquid level gauge. The test requirements shall comply with the provisions of GB150.
The paint, packaging and transportation of the liquid level gauge shall comply with the provisions of JB2536 standard. 4.0.10 The product shall be accompanied by a quality certificate of various inspections including the above requirements when it leaves the factory.
5 Selection regulations
5.0.1 Flange size and type for external connection The nominal diameter of the flange is DN20 or 3/4\. 1
2 Flange types are A, B and C. The connection dimensions are A: Raised face flange (RF), according to HGI46-91, PN2.5; B: Raised face flange (M), according to HGJ47-91, PN2.5C: Raised face flange (RF), according to ANSIB16.5S.O.300#. 5.0.2 Gasket
This standard uses asbestos rubber sheet. Users can choose materials with preload pressure less than or equal to 25.5MPa and gasket coefficient m less than or equal to 2 for replacement according to operating conditions and medium characteristics, but it needs to be indicated in the assembly drawing of the equipment. Marking regulations and examples are in accordance with 3.0.4. 5.0:32
5.0.4 Various specifications of liquid level gauges in this standard are selected according to Table 5.0.4 and indicated in the details column of the equipment assembly drawing.
Liquid level gauge
Liquid level gauge
Wave surface gauge
Liquid level gauge
Liquid level gauge
Liquid level gauge
Liquid level gauge
Liquid level gauge
Liquid level gauge
Liquid level gauge
Liquid level gauge
Table 5.0.4 Specifications and markings for glass tube liquid level gauge (PN1.6)
A(B,C) G1.6- 1 (I)--500
A(B,C) G1. 6— 1 (straight)--600
A(B,C) G1.6- 1 (1)--800
A(BC) G1.6-- 1 ( )-1000
A(B,C) G1.6- 1 (1)-1200
A(B,C) G1.6-- I (I )-1400
A(B,C)G1.6- I (I)W-500
A(BC) G1.6- I (I )W- -600
A(BC) G1.6-- I (I )W-800
A(BC)G1.6- I (I)W-1000
A( BC) G1.6- I (I )W--1200
A(BC)G1.6-- I (I)W-1400
Standard drawing (i.e. construction drawing) drawing number| |tt||HG 21592--95--1
HG 21592-95--2
HG21592—95--3
HG21592--95--4
HG 21592—95--5
HG21592—95- -6
HG21592—95--7
HG21592--95--8
HG 21592—95-9
HG21592-95—10||tt| |HG 21592—95-11www.bzxz.net
HG 21592-95-12
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.