JB/T 6014-2000 Technical specifications for diesel engine high-pressure oil pipe components
Some standard content:
ICS27.020
J94
JB
Machinery Industry Standard of the People's Republic of China
JB/T6014-2000
Diesel Engine
High-pressure oil pipe assembly
Technical conditions
Diesel engines—Technical requirements for highpressure fuel injection pipe assmblies2000-08-31 Released
National Machinery Industry Bureau
Released
2001-01 -01 Implementation
JB/T6014-2000
Foreword
This standard is for JB/T6011-92 "Diesel Engine High-Pressure Oil Pipe Joints" and JB/T6014-92 "Diesel Engine High-Pressure Oil Pipe Components" Revision of Technical Conditions. During the revision, extensive editorial changes were made to the original standard, and Appendix A was added. The main technical content has not changed. This standard will replace JB/T6011-92 and JB/T6014-92 from the date of implementation. Appendix A of this standard is a reminder appendix.
This standard is proposed and coordinated by the National Internal Combustion Engine Standardization Technical Committee. This standard was drafted by: Shanghai Internal Combustion Engine Research Institute, Shanghai Oil Pipe Factory, Hangzhou Jiangnan Oil Pipe Co., Ltd., and Zhejiang Linhai Motor Vehicle Hose Factory.
The main drafters of this standard: Zhai Junming, Xu Jiangang, Wang Xuquan, Xu Changshun, Chen Youjin, Chen Linshan. This standard was first published in March 1983 and revised for the first time in May 1992. 1 Scope
Machinery Industry Standard of the People's Republic of China
Diesel engine
High-pressure oil pipe assembly
Technical conditions
Diesel enginesTechnical requiranents for high-pressurefuelinjectionpipeassmbliesJB/T6014-— 2000
Replaces JB/6011-92
JB/T6014-92
This standard specifies the structural type, technical requirements, and testing of diesel engine high-pressure oil pipe components (hereinafter referred to as high-pressure oil pipe components) Methods, inspection rules and markings, packaging, transportation and storage. This standard is applicable to diesel engine high-pressure oil pipe components with a cylinder diameter within 200mm. Reference standards
2
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB/T 197—1981
GB/T 699—1999
GB/T 905—1994
GB/T 2828—1987
GB/T3821—1983| |tt||JB/T8120.1—2000
3 Structure and type
Ordinary thread tolerance and fit
High-quality carbon structural steel
Cold drawn round steel, Size, shape, weight and allowable deviation of square steel and hexagonal steel Batch-by-batch inspection and counting Sampling procedures and sampling tables (applicable to continuous batch inspection) Cleanliness determination method for small and medium-power internal combustion engines Steel pipes for high-pressure oil pipes of compression ignition engines
Part 1: Single-wall cold-drawn seamless steel pipe technical conditions 3.1 High-pressure oil pipe assemblies are divided into type I and type II according to the connection end structure type (see Figure 1 and Figure 2). 3.2 The end structure of the high-pressure oil pipe is shown in Figures 3 and 4. The structural types of sheaths, compression washers, and pipe nuts are shown in Figures 5 to 7. For unspecified dimensions, see Table 1. State Machinery Industry Bureau 2000-08-31 approved 2001-01-01 implementation
1
2
1 high-pressure oil pipe; 2-sheath; 3-pipe nut Figure 1 type High-pressure oil pipe assembly
AO
o
20A
Figure 3
A
a
Type 1 high-pressure oil pipe| | tt | Components | |tt | |tt||product
Figure 6 compression washer
country
return
oil pipe outer diameter d
d
oil pipe|| tt||Sheath
Compression washer
Nut
D4
d
d
H
d| |tt||ds
Di
d
D
D3
302
L
6||tt ||6.2
9
5.5
5
7.9
10
6.2
10
6.4
JB/T6014—2000
Input 0
2
Figure 7 Pipe nut
Table 1
6||tt ||6.2
9
5.5
5
7.9
12
6.2
12
6.4
M12X1.5-6H
M12X1.25-6H
Type
Type II
Ds
L||tt| |s
d,
dg
8.1
7
12.5
13
17
18 -821
16.5
19.85
M14×1.5-6H
8.1
7
14.5
14| |tt||18
18-821
19.2
22.78
7
7.3
10
6.0| |tt||6
8.9
12
7.3
12
7.4
MI4×1.5-H
9.1
8
145
14
18
18-821
19.2
2278
8
8.3
11
7.0
7
9.9
14
8.3
14| |tt||8.4
M18×15-6H
10.1
9
18.5
20
25
24 -821
24.8
29.56
mm
10
10.3
13
9.0
9
11.9www.bzxz.net
16
10.3
16
10.4
M20×1.5-6H
12.1||tt ||10
20.5
22
28
27.03
27.7
32.95
3
4 Requirements
JB/T6014—2000
4.1
High-pressure oil pipe components should be manufactured according to product drawings and technical documents approved through prescribed procedures, and comply with the provisions of this standard, 4.2|| tt||The inner and outer diameters of high-pressure oil pipes should comply with the provisions of Chapter 3 of JB/T8120.1-2000 4.3
The dimensions and tolerances of high-pressure oil pipes, sheaths, compression washers and pipe nuts are as shown in Figure 3~ Figure 7 and Table 1. 4.4
Seamless steel pipes for high-pressure oil pipes shall comply with the regulations of JBT8120.1. 4.5
The parts materials and hardness of high-pressure oil pipe components are as specified in Table 2. Table 2
Part name
Sheath
Compression washer
Pipe nut
Name
High quality carbon structural steel|| tt||High-quality carbon structural steel
High-quality carbon structural steel
Material
Material
Recommended steel number
20
3545
3545
Standard number
GB/T 699
GB/T 699
GB/T 699
Recommended hardness||tt ||26~31HRC
26-31HRC
4.6 The inner diameter reduction caused by high-pressure oil pipe heading should be trimmed. The size deviation of the inner hole D within the length range of 20mm from the end face of the heading is D=1.5 When ~3mm, the deviation is =210mm; when D>3mm, the deviation is 01mm. 4.7 The sealing cone surface behind the heading of the high-pressure oil pipe must not have scratches, bruises, cracks and other defects, and there must be no cracks in the transition area between the heading and the pipe. 4.8 The surface of the clamping part of the high-pressure oil pipe heading head is allowed to have slight clamp marks that do not affect the strength. 4.9 The surfaces of high-pressure oil pipes, sheaths, compression washers, and pipe nuts should be oxidized or galvanized to passivate. The galvanized layer should be uniform, firm, bright in color, and free of defects such as bubbles, peeling, and exposed bottoms. Only slight defects are allowed. contact points of the spreader. There should be no rust on the internal and external surfaces. 4.10 High-pressure oil pipe components should undergo a pressure test. The test pressure should be no less than 1.5 times the working pressure or under a pressure of 100MPa, and the holding time should be no less than 30S. There should be no oil leakage, rupture or permanent deformation. 4.11 The inner hole of the high-pressure oil pipe should be flushed with cleaning fluid with a pressure of not less than 1MPa, and the inner surface cleanliness limit is 5mg/m. 4.12 The installation dimensions of high-pressure oil pipe components should comply with the agreement between the supplier and the buyer. 4.13 The service life of the high-pressure oil pipe assembly under normal use conditions should be consistent with that of the supporting diesel engine. 5 Inspection methods
5.1 Dimensional accuracy inspection of main parts of high-pressure oil pipes The equipment, instruments and measuring tools used in the dimensional accuracy inspection of main parts must be approved by the prescribed procedures or recognized in the industry, and be within the validity period.
The surface roughness of the parts of the high-pressure oil pipe assembly is checked with a profilometer or a surface roughness comparison sample. The inner diameter of the high-pressure oil pipe is measured with a smooth plug gauge with a general gauge length of not less than 20mm approved by the prescribed procedures. 5.2 Hardness Inspection
For parts whose hardness cannot be tested with finished products, the materials being processed on the production line are allowed to be sampled for testing. 5.3 Pressure resistance test
The pressure resistance test of the high-pressure oil pipe assembly should be carried out on the hydraulic test bench. After the pressure reaches the specified value, the duration should be no less than 30s. Observe whether there is leakage or rupture in all parts of the oil pipe assembly. and permanent deformation. 5.4 Cleanliness inspection
4
5.4.1 Measurement location: the inner surface of the high-pressure oil pipe. JB/T6014-2000
5.4.2 Measuring instruments and cleaning fluids should be no less than those specified in 2.2 and 2.3 of GBT3821-1983. 5.4.3 Filter element: 5μm filter membrane, 50mm diameter. 5.4.4 Preparation work:
a) Cleanliness measurement should be carried out at a specified site, which must be safe and reliable. The dust fall at the measurement site should not exceed 20 mg/m2 every 24 hours
b) Operation Personnel should wear clean clothing and keep their hands clean; c) The outer surface of the high-pressure oil pipe assembly should be cleaned; d) All measuring tools, containers, etc. should be cleaned: e) Use tweezers to put the filter membrane into the weighing bottle and put it in the weighing bottle. Open the weighing bottle cap halfway and place it in an oven that has been heated to 90°C ± 5°C. Take it out after 60 minutes, place it in a desiccator to cool for 30 minutes, and then weigh it for later use (if necessary, multiple filter membranes can be used to dry and weigh together. , but there should be no more than 3 pieces in each weighing bottle, and the filter membranes should be staggered with each other), and it is required that the difference between the two drying and weighing times of each filter membrane should not be greater than 0.4mg. 5.4.5 Operation steps:
a) Scrub the outside of the high-pressure oil pipe assembly clean, and repeatedly inject cleaning fluid into the pipe with a syringe. The volume of the injected cleaning fluid should be greater than 10 times the volume of the oil pipe;
b ) When using a syringe to rinse, the cleaning solution should be prevented from splashing out of the container; c) Use tweezers to wet the filter membrane to be used in the cleaning solution, then place it tightly on the filter screen, and then use metal clips to clamp the butt joint of the filter screen. , pour the cleaning fluid with impurities collected from the inner surface of the high-pressure oil pipe into the funnel for vacuum filtration. The vacuum degree of the vacuum filtration system should be less than or equal to 80kPa;
d) Use the cleaning fluid to clean the filter Rinse the filter membrane inside at least twice, put the filter membrane with impurities into the original weighing bottle, dry and weigh according to the provisions of 5.4.4e).
5.4.6 Calculation of impurities
≥W,=GG
Where: W, the mass of impurities in the i-th oil pipe, mg; G.—the mass of the filter membrane before filtration , mg;
G,——The mass of the filter membrane after filtration, mg. 5.4.7 Calculation of cleanliness
9-W/(nl)
会
Where: α - measured value of inner surface cleanliness of high-pressure oil pipe assembly, mg/m; n Number of high-pressure oil pipe samples;
1—length of high-pressure oil pipe, m.
5.5 Service life of high-pressure oil pipe components
(1)
(2)
The service life inspection of high-pressure oil pipe components should be carried out with the supporting diesel engine for life tests or as manufactured Agreement between the factory and the user. 6 Inspection rules
6.1
Inspection classification
5
6.2
6.3
a) Type inspection;
b )Factory inspection.
The inspection content shall be in accordance with the provisions of Table 3
JB/T
6014-2000
The sampling inspection plan shall be in accordance with the provisions of GB/T2828, or shall be agreed upon by both parties, table 3
serial number
1
2
3
4
5
6
7| |tt||8
9
10
11
12
13
14
15||tt ||16
Pressure test
Inspection items
Inner surface cleanliness of high-pressure oil pipe assembly
Service life
High-pressure oil pipe material
Pipe nut material and hardness
High-pressure oil pipe inner diameter size deviation
High-pressure oil pipe seal cone surface roughness
Inner hole size deviation within a length of 30mm from the high-pressure oil pipe joint end face High-pressure oil pipe seal Cone angle deviation
High-pressure oil pipe taper surface jumps from the centerline High-pressure oil pipe assembly installation dimensions
Maximum size deviation of the outer circle after the high-pressure oil pipe heading head Limit deviation of high-pressure oil pipe outer diameter size ||tt| |High-pressure oil pipe assembly packaging
Compression gasket hardness
High-pressure oil pipe assembly surface quality
7 marking, packaging, transportation and storage
Type inspection
V
High-pressure oil pipe components that meet the requirements of this standard must be listed in the given order, with the following code numbers: 7.1
a) Product name, logo;
6) Reference standards: || tt||c) Structure type, according to Figure 1 and Figure 2;
d) High pressure oil pipe outer diameter, mm;
e) High pressure oil pipe inner diameter, mm;
f) High pressure Oil pipe length, mm;
g) thread selection, according to Table 1.
Example:
I-type high-pressure oil pipe outer diameter 6mm, inner diameter 2mm, length 200mm,! The thread is M12×1.5:
JB/T6014-I6-2-200M12X1.5
7.2
6
The surface of the high-pressure oil pipe assembly should have the manufacturer's logo. Factory inspection
7.3
JB/T6014—2000
The wrapped high-pressure oil pipe assembly should be accompanied by a product certificate signed by the manufacturer's quality inspection department. The certificate should be marked:
a) Manufacturer’s name or factory logo;
b) Product name, specifications and standard number:
c) Equipped diesel engine model; || tt||d) Factory date.
7.4. The outer surface of the packaging box should be marked:
a) Manufacturer’s name, factory logo and address;
b) Product name, specifications and standard number;
c) Equipped diesel engine Model;
d) Quantity;
e) Gross weight;
f) Receiving unit and address;
g) "Handle with care", "Protect against moisture" , "anti-pressure" and other signs; h) date of manufacture.
7.5 The holes at both ends of each high-pressure oil pipe assembly must have dust-proof measures to keep the holes clean. 7.6 The high-pressure oil pipe components packed in the packaging box should be waterproof and moisture-proof, and should be guaranteed not to be damaged during normal transportation. The total weight of each box shall not exceed 50kg
7.7 Under normal storage and transportation conditions, the manufacturer shall ensure that the product will not rust within 12 months from the date of shipment. 7
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