JB/T 8120.2-2000 This standard is equivalent to ISO 8535-2:1996 "Steel pipes for high-pressure fuel pipes for compression ignition engines Part 2: Technical conditions for composite steel pipes". Under the general title of JB/T 8120 "Steel pipes for high-pressure fuel pipes for compression ignition engines", it includes the following two parts: JB/T 8120.1-2000 Technical conditions for single-wall cold-drawn seamless steel pipes for high-pressure fuel pipes for compression ignition engines JB/T 8120.2-2000 Technical conditions for composite steel pipes for high-pressure fuel pipes for compression ignition engines This standard specifies the dimensions and technical requirements for single-wall cold-drawn seamless steel pipes for high-pressure fuel pipes (Type 2 pipes) for diesel engines (compression ignition internal combustion engines) and for high-pressure fuel pump testing (Type 1 pipes). This standard is applicable to diesel engines (reciprocating compression ignition internal combustion engines). This standard was first issued in August 2000. JB/T 8120.2-2000 Steel pipes for high pressure oil pipes of compression ignition engines Part 1: Technical conditions for composite steel pipes JB/T8120.2-2000 Standard download decompression password: www.bzxz.net

ICS27.020
Machinery Industry Standard of the People's Republic of China
JB/T8120.2—2000
Idt IS0 8535-2 : 1993
Compression-ignition engines-Steel tubes forhigh-pressure fuel injection pipes-Part 2: Technical requirements for composite steel tubes
Compression-ignition engines-Steel tubes forhigh-pressure fuel injection pipes-Part 2: Reguirements for composit tubes2000-08-31Published
State Bureau of Machinery Industry
2001-01-01 Implementation
JB/T8120.2—2000
This standard adopts S08535-2:1993 Steel pipe for oil pipe of direct combustion engine Part 2: Composite pipe drawing parts
JB/T8120 is under the general standard of "steel pipe for oil pipe of compression ignition engine", and the following parts are composed: JB/T8120.1—2000 Single wall cold-wrapped steel pipe without wall general technical conditions: JB/T8120.2—2000 Composite saw and other technical conditions, and the appendix A of this standard is a reminder.
This standard is proposed and submitted by the Technical Committee for Standardization of Domestic Combustion Engines. : The unit of this standard is: Shanghai Internal Combustion Research Institute. The main drafters of this standard are: Ren Ming, Chen Linli, 9T8120.22000
ISO Foreword
The International Organization for Standardization (ISO) is a global federation of national standardization bodies (ISO member bodies). The work of developing international standards is generally carried out by technical committees. Each member body has an interest in a subject and has the right to send a representative to participate in the technical committee that prepares the document for that subject. Governments and non-governmental international organizations can also participate in the work through cooperation with [. In all aspects of the promotion of electrical standards, I5O and the International Electrical Commission (IEC) have close cooperation: the international standard draft adopted by the technical committee is distributed to the member groups for voting, and at least 75% of the members must vote to become an international standard. The national standard ISO 3535-2 is formulated by the International Organization for Standardization Technical Committee (15O/TC22) Road Vehicle Fuel Injection and Filter Subcommittee (SC-1). ISO8535 is composed of the following parts under the general title of "Steel pipes for high-pressure fuel injection of compression ignition engines": Part 1: Technical conditions for single-wall cold-drawn steel pipes: Part 2: Technical conditions for composite steel pipes. Annex A of this part of ISO 8535 is for reference only. 1 Scope 1 Standard of the People's Republic of China on Machinery Industry 1 Steel tubes for high-pressure fuel pipes for compression ignition engines Part 2: Composite steel screens Technical case 1 ISO 14001-2000 Steel tubes for high-pressure fuel pipes for compression ignition engines Part 2: Composite steel screens Technical case 1 ISO 14001-2000 8535-2:1993
This standard specifies the dimensions and requirements of composite impact pipes for high-pressure oil pipes (type 2 pipes) and high-pressure lubrication pump test pipes (type 1 pipes) for diesel engines (compression ignition internal combustion engines).
This standard applies to diesel engines (compression ignition internal combustion engines). Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. All parties using this standard are invited to explore the possibility of using the latest versions of the following standards. ISO 404: 1992
JSO 6507-1: 1982
JSO 6507-3: 1982
ISO 6B92:1984
3 Dimensions and tolerances
Steel and steel products--Technical delivery items
Hardness test for metal mesh materials Vickers hardness test Part 1: HV5.-HV100 Hardness test for metal mesh materials Vickers hardness test Part 2: HV\2-HVS Tension test for other materials
Table 1 lists the recommended inner and outer diameters. Other sizes may be used upon agreement between the supplier and the buyer. Inner diameter outer The tolerances of the diameters are as follows: a) Inner diameter d:
Class 2 pipe: ±0.15mm
Class 1 pipe: ±0.025mm l)
Note: See Chapter 1 for explanation of the relevant specifications. b) Outer diameter D:
Class 1 and 2 pipes: ±0.06mm
The degree of consistency between the outer diameter and the inner diameter of the pipe should be proportional to the thickness of the pipe, as shown in Figure 1, 1] is consistent with [504093.
National Machinery Industry Bureau 2000-08-31 approved 2001-01-01 implementation
Chemical selection
JE/T81102-1000
Table of inner and outer diameters: Including diameter size is determined according to the ratio of outer diameter to inner diameter within 24:1 according to 1SO3.
3.2 Length
The length and length shall be agreed upon by both parties. State light mouth
Select rough steel size
1 Material process
4. Slant material manufacturing 1. Process
JB/T 8120.2-200
The pipe shall be made of high-quality non-alloy steel or equivalent quality steel produced by smelting process to ensure uniform structure. Composite structures can be made by various methods: uncut inner (village) pipe, CA:
chain inner pipe, CB.
4.2 Surface quality
The inner and outer surfaces of the finished steel should be free of peeling, ridges, grooves, folds, delamination and pitting. 4.2. Basic inner surface quality bzxz.net
The inner surface of the 5-level steel pipe should be continuously finished to ensure its correct size and smooth surface: when inspected with 5 times magnification (see Table 2), there shall be no more than 5 defects with a depth of more than 0.3mm (maximum) on each cross section of the pipe, such as cracks, cracks, etc. This does not apply to CB-type pipes.
4.2.2 Advanced inner surface quality
If the depth of defects needs to be strictly controlled, the P, Q or R grade of the evaluation can be noted in the steel pipe marking (see Chapter 6) according to the times shown. This is applicable to the Kada class of pipes.
Table 2 Surface quality level of inner cavity of steel pipe
Allowable defects
A maximum of 5 defects with a depth exceeding 0.05--D.08mm are allowed, and 5 defects with a depth exceeding 0.2-1.05nm are allowed. The depth of all defects is less than 0.02mm
4.3 Surface treatment
The surface of the steel pipe can be galvanized, bonded or chemically surface treated (see Table 3). The inner surface of the tube should not have a coating
Table 3 Surface treatment of steel tubes for delivery
External surface condition
Small form (optional by the manufacturer
The outer surface is in the original state without any treatment. It can be annealed or normalized under controlled nitrogen atmosphere, but it must not have any loose oxide. The thickness of the zinc coating should be less than m and colorless salt should be added for purification. The thickness of the coating should not be less than um and can be purified as yellow [otherwise specified]
According to the design specifications of the two double forces 1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1.1 8120.22000
Steel is in accordance with the mechanical properties determined by the material type listed in Table 4 (code: ~2) Table 1 Primary performance
Heap small tensile strength
About structure type
Note: Mechanical properties refer to the values ​​tested according to 1506892. 1) The amount of reduction on the outer diameter of the pipe,
: 2) On the inner (village) surface of the orange firewood. 4.5 Cleanliness
Small stress
Small delay
Maximum degree
The inside of the steel pipe should be clean, free of impurities or coatings that affect processing and performance. If there are special requirements, the supplier and the buyer should agree when ordering.
4.6 Straightness
Unless otherwise agreed by the supplier and the buyer, the steel pipe should be straight, with a maximum error of 1450 and no local deformation. 4.7 Anti-corrosion
The inside and outside surfaces of the steel pipe should be free of corrosion during transportation and storage in closed places. If the supplier and buyer are in the same state, the dust-proof surface adopts permanent coating, and the temporary coating must not damage the fuel injection and combustion system of the engine, and can be cleaned by diesel.
5 Inspection
If the supplier and buyer have no other inspection agreement, the inspection is carried out in accordance with 5.1-5.7. 5.1 Inspection scope
The steel pipes should be identically copied for heat treatment, adhesion, size and surface structure, and sent for batch inspection. The inspector should select one pipe from each batch to inspect item 5.3 on the day of inspection, and select 3 pipes from the batch to inspect item 5.5 and item 5.2, 5.6.1 and 5.7 on the month of inspection. The inspector should inspect all the selected pipes: inspect item 56.2. The relevant batch, sample number and acceptance criteria should be agreed upon by the buyer and seller when placing an order. 5.2 Dimensional inspection
The dimensions of the steel pipe shall comply with the dimensions and tolerances shown in Section 3. 5.3 Mechanical properties test
The steel pipe shall comply with the specifications in Table 4. The test shall be carried out in accordance with 1506892, JS06507-1 and/or 1506507-2 to measure the tensile strength, yield stress, elongation and hardness. 5.4 Bend test
The steel pipe shall be able to be bent by a circle with the same diameter as its outer diameter through 180° without any cracks other than superficial. 5.5 Cold forging test of pin
A steel pipe with a length of twice the outer diameter of the pipe (21) shall be able to be compressed to a length D without any cracks deeper than U.13 mm. JB/T8120.2—2000
This test shall be carried out on two parallel plates of appropriate size. 5.6 Surface quality inspection
Check the pipe surface by daily measurement to ensure that it meets the requirements of 4.3. 5.6.1 If the supplier and the buyer agree, the non-inspection square can be used instead of visual inspection. 5.6.2 If it is required to inspect the specified defect depth of the inner surface of the steel pipe, the counting inspection plan and the agreed quality level AQL shall be determined at the time of ordering: the cross section of the pipe shall be inspected at the magnification specified in Table 2. 6.3 The surface of the steel pipe shall be subjected to the relevant inspection of this layer when necessary, and the inspection shall be confirmed by the supplier and the buyer.
5.7 Internal test
The pipe shall be able to withstand the internal pressure calculated by the formula (!) without causing permanent deformation inside. This ability shall be confirmed by hydraulic test. If the supplier and the buyer agree, non-destructive testing methods such as electronic inspection may also be used. The maximum theoretical test pressure P is the product of the stress coefficient and the stress R. The unit is N/mm2x*-t.
Re×t0
Formula: X=Dd;
D outer diameter, mm;
—inner diameter, mm
5.8 Re-inspection
If the selected steel pipe does not meet the requirements after the inspection in accordance with 5.3, two more steel pipes must be selected from the same batch of steel pipes for re-inspection. The test in 5.5 is carried out according to the same procedure. Each steel pipe meets the test requirements. If any one of them is qualified, the whole batch of steel pipes should be accepted. If the rejected batch is improved, such as re-heat treatment, it can be submitted for acceptance again. In this case, if the inspection results of 5.3 and 5.5 still do not meet the requirements, the whole batch of products should be rejected. 5.9 Inspection Certificate
If necessary [see Section 6.1]1, an inspection certificate shall be issued for each batch of delivery to confirm that the delivered steel pipes meet the specifications of this standard. The records recorded during the subsequent production inspection can be used as proof. The supplier and the buyer can agree on other inspection certificates. Marking method
Steel batches that meet the requirements of this standard shall be marked in the following order: a! b) Not applicable to this standard JB/T8120.2 c) Structural type: connect 4.I with code "CA" or "CB" (the first letter "C" indicates a composite structure); 4) Dimensions: The second and third characters indicate the inner and outer diameters of the tube, respectively, in mm:) Degree of fit: The fourth character determines the inner diameter tolerance [3. a) 1) The fifth character indicates the mechanical properties of the steel as specified in Table 4:] The sixth character indicates the surface quality level of the inner cavity of the steel as specified in Table 2 [This does not apply to Class C tubes 2! 1 N/mm'= MPz.
J8T8120.2-2000
h, the 7th character: indicates the treatment of the outer surface of the steel pipe [see Table 3) 1) The letter "Z" can be added at the end of the mark to indicate that the pipe manufacturer is required to provide a certificate to confirm compliance with this standard and supplementary product requirements (if any) (see Is404
Example:
The radio tube derived from this standard should be marked as follows: General JB/r8120.2CA-2-6-12
Structure type
Accuracy grade
Mechanical properties
Inner surface quality level
External surface treatment
Required tensile test certificate
" mark
The product shall be marked according to the marking method of this standard. If the supply and demand parties agree, the mark can be used. B Packaging
Unless otherwise agreed by the supply and demand parties, the product shall be sealed with two seals and tied tightly with tape when delivered. [] ISO3: 1973
[2] 1SO 2080 : 1981
[3]184093：1986
[4]ISO 4$20:198]
[5]1508535:1990
JB/T8120.2-2000
Appendix A
【Thanks to the suggestion)
References
Preferred number Preferred number System engraving
Electrical and related process vocabulary
Commercial fuel pipe for fuel injection test of road vehicles
Chromium salt conversion coating of zinc and chain storage coating for high-pressure fuel pipe of compression engine, copper for temporary policy! Division: Single wall cold drawn pipe without pipe technical conditions7 Internal test
The pipe should be able to withstand the internal pressure calculated by the formula (!) without causing permanent deformation inside. This ability must be confirmed by hydraulic test. If the supply and demand are agreed, non-destructive testing methods such as electronic testing can also be used. The maximum theoretical test pressure P is the product of the stress coefficient and the stress R. The unit is N/mm2x*-t.
Re×t0
Formula: X=Dd;
D outer diameter, mm;
—inner diameter, mm
5.8 Re-test
If the selected steel pipe does not meet the requirements after the inspection in accordance with 5.3, two more steel pipes from the same batch must be selected for re-testing. The test in 5.5 is carried out according to the same procedure. Each steel pipe meets the test requirements. If any one of them is qualified, the entire batch of steel pipes should be collected. The supplier may submit the rejected batch for acceptance again after improvements have been made to it, for example, by reheat treatment. In this case, if the test results of 5.3 and 5.5 still do not meet the requirements, the entire batch shall be rejected. 5.9 Inspection certificate
If necessary [see clause 6.1]1, an inspection certificate shall be issued for each delivery to confirm that the delivered steel pipes meet the specifications of this standard. The records recorded during the subsequent production inspection may be used as proof. The supplier and the buyer may agree on other inspection certificates. Marking method
Steel products that meet the requirements of this standard shall be marked in the following order: a! b) Not applicable to this standard JB/T8120.2 c) Structural type: connect 4.I with code "CA" or "CB" (the first letter "C" indicates a composite structure); 4) Dimensions: The second and third characters indicate the inner and outer diameters of the tube, respectively, in mm:) Degree of fit: The fourth character determines the inner diameter tolerance [3. a) 1) The fifth character indicates the mechanical properties of the steel as specified in Table 4:] The sixth character indicates the surface quality level of the inner cavity of the steel as specified in Table 2 [This does not apply to Class C tubes 2! 1 N/mm'= MPz.
J8T8120.2-2000
h, the 7th character: indicates the treatment of the outer surface of the steel pipe [see Table 3) 1) The letter "Z" can be added at the end of the mark to indicate that the pipe manufacturer is required to provide a certificate to confirm compliance with this standard and supplementary product requirements (if any) (see Is404
Example:
The radio tube derived from this standard should be marked as follows: General JB/r8120.2CA-2-6-12
Structure type
Accuracy grade
Mechanical properties
Inner surface quality level
External surface treatment
Required tensile test certificate
" mark
The product shall be marked according to the marking method of this standard. If the supply and demand parties agree, the mark can be used. B Packaging
Unless otherwise agreed by the supply and demand parties, the product shall be sealed with two seals and tied tightly with tape when delivered. [] ISO3: 1973
[2] 1SO 2080 : 1981
[3]184093：1986
[4]ISO 4$20:198]
[5]1508535:1990
JB/T8120.2-2000
Appendix A
【Thanks to the suggestion)
References
Preferred number Preferred number System engraving
Electrical and related process vocabulary
Commercial fuel pipe for fuel injection test of road vehicles
Chromium salt conversion coating of zinc and chain storage coating for high-pressure fuel pipe of compression engine, copper for temporary policy! Division: Single wall cold drawn pipe without pipe technical conditions7 Internal test
The pipe should be able to withstand the internal pressure calculated by the formula (!) without causing permanent deformation inside. This ability must be confirmed by hydraulic test. If the supply and demand are agreed, non-destructive testing methods such as electronic testing can also be used. The maximum theoretical test pressure P is the product of the stress coefficient and the stress R. The unit is N/mm2x*-t.
Re×t0
Formula: X=Dd;
D outer diameter, mm;
—inner diameter, mm
5.8 Re-test
If the selected steel pipe does not meet the requirements after the inspection in accordance with 5.3, two more steel pipes from the same batch must be selected for re-testing. The test in 5.5 is carried out according to the same procedure. Each steel pipe meets the test requirements. If any one of them is qualified, the entire batch of steel pipes should be collected. The supplier may submit the rejected batch for acceptance again after improvements have been made to it, for example, by reheat treatment. In this case, if the test results of 5.3 and 5.5 still do not meet the requirements, the entire batch shall be rejected. 5.9 Inspection certificate
If necessary [see clause 6.1]1, an inspection certificate shall be issued for each delivery to confirm that the delivered steel pipes meet the specifications of this standard. The records recorded during the subsequent production inspection may be used as proof. The supplier and the buyer may agree on other inspection certificates. Marking method
Steel products that meet the requirements of this standard shall be marked in the following order: a! b) Not applicable to this standard JB/T8120.2 c) Structural type: connect 4.I with code "CA" or "CB" (the first letter "C" indicates a composite structure); 4) Dimensions: The second and third characters indicate the inner and outer diameters of the tube, respectively, in mm:) Degree of fit: The fourth character determines the inner diameter tolerance [3. a) 1) The fifth character indicates the mechanical properties of the steel as specified in Table 4:] The sixth character indicates the surface quality level of the inner cavity of the steel as specified in Table 2 [This does not apply to Class C tubes 2! 1 N/mm'= MPz.
J8T8120.2-2000
h, the 7th character: indicates the treatment of the outer surface of the steel pipe [see Table 3) 1) The letter "Z" can be added at the end of the mark to indicate that the pipe manufacturer is required to provide a certificate to confirm compliance with this standard and supplementary product requirements (if any) (see Is404
Example:
The radio tube derived from this standard should be marked as follows: General JB/r8120.2CA-2-6-12
Structure type
Accuracy grade
Mechanical properties
Inner surface quality level
External surface treatment
Required tensile test certificate
" mark
The product shall be marked according to the marking method of this standard. If the supply and demand parties agree, the mark can be used. B Packaging
Unless otherwise agreed by the supply and demand parties, the product shall be sealed with two seals and tied tightly with tape when delivered. [] ISO3: 1973
[2] 1SO 2080 : 1981
[3]184093：1986
[4]ISO 4$20:198]
[5]1508535:1990
JB/T8120.2-2000
Appendix A
【Thanks to the suggestion）
References
Preferred number Preferred number System engraving
Electrical and related process vocabulary
Commercial fuel pipe for fuel injection test of road vehicles
Chromium salt conversion coating of zinc and chain storage coating for high-pressure fuel pipe of compression engine, copper for temporary policy! Division: Single wall cold drawn pipe without pipe technical conditions
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