This standard specifies the technical requirements, inspection, painting and marking for the manufacture of shell boiler bodies. JB/T 1619-2002 Technical requirements for the manufacture of shell boiler bodies JB/T1619-2002 Standard download decompression password: www.bzxz.net

ICS 27.060
Machinery Industry Standard of the People's Republic of China JB/T1619-2002
Replaces JB/T1618—1992
JB/T 1619—1993
Specification for manufacturing of shell boiler properties2002-12-27 Issued
Implementation on 2003-04-01 Issued by the State Economic and Trade Commission of the People's Republic of China Foreword
Normative references
3 Technical requirements
Material and welding
3.3 Surface quality,
3.4 ​​Pipe holes and welded parts
3.5 Manufacturing
4 Inspection
5 Paint, marking,
Table 1 Distance from the center line of the weld to the starting point of the arc of the flange of the pressure elementTable 2 Flatness of the tube sheet
JB/T1619—2002
JB/T 1619--2002
This standard replaces JB/T1618—1992 "Technical Conditions for Manufacturing Pressure Elements of Shell Boilers" and JB/T1619—1993 "Technical Conditions for Assembly of Shell Boiler Body?" ：
Compared with JB/T1618-1992 and JB/T1619-1993, the main changes of this standard are as follows: The scope of application has been adjusted (Chapter 1 of 3B/T1618, 1992 edition and JB/T1619, 1993 edition: Chapter 1 of this edition): 1) The upper limit of the rated working pressure of steam boilers is changed from no more than 1.6MPa to no more than 2.5MPa, and the provisions of rated working pressure greater than 0.04MPa and rated evaporation capacity not less than 0.1th are added: 2) The provisions of rated water outlet pressure of hot water boilers greater than 0.1MPa are added: - For JB/T1618 (19 3.5.4 of the 1992 edition has been modified (3.2.6 of this edition): 1) The adjacent cylinder is clearly defined as the adjacent cylinder section on the boiler shell and the furnace; 2) The joint welds of the head and tube sheet are changed to the joint welds of the head, tube sheet, furnace top and bottom ring; the requirement that the bracing parts are not allowed to be spliced ​​is added (3.2.8 of this edition); the distance from the edge of the connecting weld between the tube and the tube sheet to the starting point of the arc of the tube sheet flange and the distance between the edges of the welds of two adjacent tubes should not be less than 6mm is added (3.4.2 of this edition); the T-joint connection between the tube sheet and the boiler shell and the furnace of the horizontal internal combustion boiler shall meet the requirements of the "Regulations on Safety Technical Supervision of Steam Boilers" or the "Safety Technical Supervision of Hot Water Boilers" The conditions stipulated in the "Full Technical Supervision Regulations" (3.4.5 of this edition): the requirements for the manufacturing tolerance of some pressure components, such as the manufacturing tolerance of the diameter of the component, the manufacturing tolerance of the height of the component, the shape and position tolerance of the component, etc. (3.17 to 3.22 of JB/T1618-1992 edition): the difference between the maximum diameter and the minimum diameter of the same cross-section of the component is uniformly stipulated to be no more than 0.5% of the nominal diameter (3.17 and 3.22 of JB/T1618-1992 edition: 3.5.3.1 of this edition); ~ The edge angle at the longitudinal weld of the shell cylinder is uniformly changed to no less than 4mm (JB/T1618-1992 edition 3.22 of this edition: 3.5.3.2 of this edition):
Added that the manufacturing of the header shall comply with the provisions of JB/T1610 (3.5.6.1 of this edition): Change the flue gas temperature in 3.5 of JB/T1619 (1993 edition) from "900℃" to "600℃" (3.5.7.6 of this edition: This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Boiler Standardization (CSBTS/TC73). This standard was drafted by the Shanghai Industrial Boiler Research Institute. The main drafters of this standard: Qian Fenghua, Tian Yaoxin The previous versions of the standards replaced by this standard are: -JB 1618-1975, JB 1618-1983, JB/T 1618-1992: JB 1619-1975, JB 1619-1983, JB/T 1619-1993. 1 Scope
Technical conditions for the manufacture of shell boilers
This standard specifies the technical requirements, inspection, painting and marking for the manufacture of shell boilers. JB/T 1619-2002
This standard applies to fixed steel steam boilers with water as the medium and rated working pressure greater than 0.04MPa but not greater than 2.5MPa, and rated evaporation capacity not less than 0.1Vh, and fixed steel hot water boilers with rated water outlet pressure greater than 0.1MPa. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version is applicable to this standard. JB/T1609 Technical conditions for boiler drum manufacturing) Technical conditions for boiler header manufacturing
JB/T 1610
JB/T 1611
Technical conditions for boiler tube manufacturing
Technical conditions for boiler water pressure test
JB/T 1612
JB/T 1613
JB/T 1615
Technical conditions for welding of boiler pressure components
Technical conditions for boiler painting and packaging
Dimensional deviation of center distance of boiler tube holes
JB/T1623
Welded tube holes of industrial boilers
JB/T 1625
JB/T 3375
JB/T 4308
Rules for factory acceptance of materials for boilers
Regulations for the transfer of steel stamps and marks for boiler products
JB/T9619 Technical conditions for expansion of industrial boilers Safety technical supervision regulations for steam boilers
Safety technical supervision regulations for hot water boilers
3 Technical requirements
3.1 Materials and welding
3.1.1 The selection of materials for pressure components shall comply with the provisions of relevant technical documents. The materials used to manufacture pressure components shall comply with the requirements of the design drawings. Material substitution shall be approved according to the prescribed procedures. Necessary process tests shall be carried out on the steel grades used by the manufacturer for the first time: 3.1.2 The materials and welding materials of pressure components shall be accepted by the acceptance department in accordance with the provisions of JB/T3375. Those that have not been accepted or have failed the acceptance shall not be allowed to be put into production. If the main materials used for boilers with a rated steam pressure of no more than 0.4MPa have complete original quality certificates and clear and complete material markings, their factory inspection can be exempted from chemical composition analysis and mechanical properties tests. 3.1.3 The steel plates used to manufacture pressure components should be marked and transplanted according to the provisions of JB/T4308 before cutting and blanking. 3.1.4 The welding of pressure components should comply with the provisions of JB/T1613. 3.2 Splicing
3.2.1 The splicing of pressure component steel plates should be double-sided butt welding. 3.2.2 The splicing welds of tube sheets and heads with a nominal inner diameter greater than 2200mm should not be more than two: The splicing welds of tube sheets and heads with a nominal inner diameter of no more than 2200mm should not be more than one. The entire splicing weld of the tube sheet should not be arranged on the flange arc and should not pass through the flange hole. The splicing welds on the head should comply with the provisions of JB/T1609. 3.2.3 For boiler shells with a nominal inner diameter greater than 1800mm, there should be no more than three longitudinal welds on each section of the shell: For boiler shells and furnaces with a nominal inner diameter not greater than 1800mmJB/T 1619-2002
, there should be no more than two longitudinal welds on each section of the shell. The length of the outer arc between the center lines of the longitudinal welds of each section of the shell should not be less than 300mm
3.2.4 The length of the shortest section of the shell of the boiler shell and furnace should not be less than 300mm. 3.2.5 The welds of the U-shaped bottom ring should be arranged radially. The shortest arc length between the center lines of the two welds should not be less than 300mm. 3.2.6 The longitudinal welds of adjacent sections of the shell and furnace, as well as the welds of the head, tube sheet, furnace top, bottom ring and the longitudinal welds of the adjacent sections should not be connected to each other. The length of the outer arc between the two welding center lines should not be less than 100mm. 3.2.7 The distance from the center line of the weld to the starting point of the arc of the pressure element should comply with the requirements of Table 1. Table 1 Distance from the center line of the weld to the starting point of the arc of the pressure element Unit: mm
Wall thickness of the flange element!
3.2.8 Bracing parts are not allowed to be spliced.
3.3 Surface quality
Distance!
L≥25
L≥t/2+25
3.3.1. There should be no cracks or fissures on the surface of the pressure-bearing components. Cracks and fissures caused by steel plate quality not meeting the requirements and overburning should not be repaired by welding. Cracks and fissures that are not caused by the above reasons can be repaired by welding, but non-destructive testing should be carried out after repairing welding. 3.3.2 If the depth of the depression on the surface of the cylinder is within the range of (0.5~1) mm, it should be repaired and ground into a round transition: if it exceeds 1 mm, it should be repaired and ground flat, and non-destructive testing should be carried out.
3.3.3 If the depth of the depression on the surface of the head, tube sheet, and furnace top is within the range of 0.5 mm to 10% of the plate thickness, it should be repaired and ground flat, and non-destructive testing should be carried out. 3.3.4 If the height of the protrusion on the surface of the pressure-bearing component exceeds 1 mm, it should be repaired and ground flat. 3.4.4.1. Welded pipe holes should be avoided from being opened on welds and in their heat-affected zones. If it cannot be avoided, it is only allowed to make holes on the weld and in its heat-affected zone when the hole opening conditions specified in the "Safety Technical Supervision Regulations for Steam Boilers" or "Safety Technical Supervision Regulations for Hot Water Boilers" are met. 3.4.2 The distance from the edge of the connecting weld between the pipe and the tube sheet to the starting point of the arc of the tube sheet flange and the distance between the weld edges of two adjacent pipes should not be less than 6mm
3.4.3 The distance from the center of the expansion tube hole to the edge of the weld and the starting point of the arc of the tube sheet flange should not be less than 0.8d (d is the diameter of the tube hole), and should not be less than 0.5d+12mm.
3.4.4 Avoid welding parts in the main weld of the pressure component and in its heat-affected zone. If it cannot be avoided, the weld of the welded parts can pass through the main weld, but not end on the weld and in its heat-affected zone, so as to avoid stress concentration in these parts. 3.4.5 For horizontal internal combustion steam boilers and horizontal internal combustion hot water boilers with a rated working pressure not exceeding 1.6MPa, if the tube sheet is to be connected to the boiler shell and the furnace with a T-joint, the provisions of the "Safety Technical Supervision Regulations for Steam Boilers" or "Safety Technical Supervision Regulations for Hot Water Boilers" shall be met.
3.5 Manufacturing
3.5.1 Butt edge deviation
The butt edge deviation of pressure-bearing components shall comply with the provisions of JB/T1613. 3.5.2 Process thinning of pressure-bearing components
3.5.2.1 The thickness of the thinnest part of the arc of the tube sheet flange and the corrugation of the corrugated furnace should not be less than 85% of its designed calculated thickness. 3.5.2.2 The thinning amount of the straight section of the flange hole of the pressure-bearing component, when there is no reinforcement ring or it is impossible to strengthen, the thickness of the straight section edge should not be less than 70% of the designed calculated thickness of the component.
3.5.3 Roundness and angularity
3.5.3.1 The difference between the maximum diameter and the minimum diameter on the same section of the cylindrical part of the pressure element shall not be greater than 0.5% of its nominal inner diameter, 2
JB/T 1619—2002
3.5.3.2 The angularity at the longitudinal weld of the boiler shell shall not be greater than 4mm: The angularity at the longitudinal weld of the furnace cylinder shall not be greater than 3mm. 3.5.4 The flatness of the boiler shell
After assembly. The flatness of the tube sheet shall comply with the provisions of Table 2. Table 2 Flatness of the tube sheet
Unit: mm
Nominal inner diameter D.
Flatness
D.≤1000
1000D,≤1500
15002200
For tube sheets in contact with flue gas above 600℃, measures shall be taken to eliminate gaps in welded smoke pipes and tensioning pipes, and the length of the pipe beyond the weld connecting it to the tube sheet shall comply with the following provisions: a)www.bzxz.net
When the smoke temperature is greater than 600℃, it shall not be greater than 1.5mm: When the smoke temperature is not greater than 600℃, it shall not be greater than 5mm. b
3.5.8 Sealing surfaces of holes and hole covers
The parameter value R. of the surface roughness of the sealing surface of manholes, head holes, hand holes and their hole covers shall not be greater than 12.5um, and radial notches and circumferential notches that may cause leakage are not allowed.
3.5.9 Flange
The inclination of the flange plane on the boiler shell ^h (Figure 1) shall not be greater than 2mm. 3.5.9.1
The center distance deviation △b of the flange screw holes on the boiler shell (Figure 1) shall comply with the following provisions: 3.5.9.2
When the outer diameter of the flange is not greater than 100mm, △b should not be greater than 1mm: b
When the outer diameter of the flange is greater than 100mm but not greater than 200mm, △b should not be greater than 2mm; when the outer diameter of the flange is greater than 200mm, △b should not be greater than 3mm. c
JB/T1619--2002
3.5.9.3 The position deviation of the water level gauge flange (Figure 2) shall meet the following requirements a) Aa is ±3mm:
Ab is ±2mm;
Ac should not be greater than 2mm:
d) Ad should not be greater than 1.5mmg
4 Inspection
The inspection department shall conduct inspection according to the drawings and the provisions of this standard, and indicate the qualified mark after passing. 4.1
4.2 The welds of pressure components shall be inspected in accordance with the provisions of JB/T1613. 4.3 After the boiler body is manufactured, it shall be subjected to water pressure test in accordance with the provisions of JB/T1612. 5 Paint and marking
5.1 The paint of the boiler body shall meet the requirements of JB/T1615 or the order requirements. 5.2 The manufacturer's factory number mark shall be stamped near the manhole or head hole. For small vertical boilers without manholes or headholes, the manufacturer's factory serial number can be marked on the connecting flange of the main steam valve or water outlet valve.
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