This standard specifies the requirements, design and structure, test methods, inspection rules, packaging, marking, transportation and storage of embedded flange closures for steel drums. This standard applies to the design, manufacture and inspection of closures. This standard replaces GB/T13251-2002 "Packaging container steel drum closures". Compared with GB/T13251-2002, this standard has the following major changes: --- Modified the name of the standard; --- Deleted other packaging drum closures in the original standard, and only retained the embedded flange closure part. GB/T 13251-2008 Embedded flange closures for packaging steel drums GB/T13251-2008 Standard download decompression password: www.bzxz.net
This standard specifies the requirements, design and structure, test methods, inspection rules, packaging, marking, transportation and storage of embedded flange closures for steel drums. This standard applies to the design, manufacture and inspection of closures.
This standard is not equivalent to ISO15750-3:2002 "Steel drums Part 3: Embedded flange closure system".
Compared with ISO15750-3:2002, the main differences of this standard are as follows:
--- Deleted type A and type B closures;
--- Modified the size of type C closure, see type A closure in 6.4;
--- Added a closure, see type B closure in 6.5.
This standard replaces GB/T13251-2002 "Packaging container steel drum closures".
Compared with GB/T13251-2002, the main changes of this standard are as follows:
--- Modified the standard name;
--- Deleted other packaging drum closures in the original standard, and only retained the embedded flange closure part.
Appendix B of this standard is a normative appendix, and Appendix A is an informative appendix.
This standard is proposed and managed by the National Technical Committee for Packaging Standardization (SAC/TC49).
The drafting units of this standard are: Sinochem Standardization Research Institute, Nanjing Ningrong Steel Drum Closure Factory, National Packaging Product Quality Supervision and Inspection Center (Guangzhou), Jiangsu Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, Wuxi Sifang Drum Co., Ltd., Tianjin Tengda Packaging Co., Ltd., and China Packaging Federation.
The main drafters of this standard are: Zhang Youlong, Wang Xiaobing, Jiang Yanglong, Mao Linfeng, Mei Jian, Zhu Liping, Tang Lijun, Sun Jiacai, Zhang Chengzhi, and Du Qingxin.
The previous versions of the standards replaced by this standard are:
---GB/T13251-1991, GB/T13251-2002.
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.
GB/T191 Pictorial marking for packaging, storage and transportation (GB/T191-2008, ISO780:1997, MOD)
GB/T912 Hot-rolled thin sheets and strips of carbon structural steel and low alloy structural steel
GB/T2828.1 Sampling inspection procedures by attributes Part 1: Sampling plan for batch inspection based on acceptance quality limit (AQL) (GB/T2828.1-2003, ISO2859?1:1995, IDT)
GB/T4956 Measurement of coating thickness of non-magnetic coatings on magnetic substrates - Magnetic method (GB/T 4956-2003, ISO2178:1982, IDT)
GB/T7307 55° non-sealed pipe thread (GB/T7307-2001, eqvISO228-1:1994)
GB/T11253 Carbon structural steel and low alloy structural steel cold rolled thin steel plate and steel strip
GB/T13040 Packaging terminology metal container

ICS55.140
National Standard of the People's Republic of China
GB/T13251—2008
Replaces CB/T13251-2002
With embedded flange closure
PackingSteel drums-linserted flange-type Closure (ISO15750-3:2002, NEQ)
2008-07-18 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Standardization Administration of the People's Republic of China
2009-01-01 Implementation
GB/T13251-2008
This standard is not equivalent to ISO15750-3:2002 "Steel drums Part 3: Embedded flange closure system". Compared with ISO157503:2002, the main differences between this standard and ISO157503:2002 are as follows: - Deleted type A and type B closures;
- Modified the size of type C closure, see type A closure in 6.4; - Added a closure, see type 13 closure in 6.5. This standard replaces GB/T13251-2002 "Packaging container steel drum closure". Compared with CB/T13251-2002, the main changes of this standard are as follows: the name of the standard has been modified;
- Other closures for packaging barrels in the original standard have been deleted, and the embedded flange closure part is retained. Appendix B of this standard is a normative appendix, and Appendix A is an informative appendix. This standard is proposed by the National Technical Committee for Packaging Standardization (SAC/TC:19) and is under the jurisdiction of the drafting units of this standard: China Chemical Standardization Research Institute, Nanjing Ningrong Steel Drum Closure Factory National Packaging Product Quality Supervision and Inspection Center (Guangzhou), Jiangsu Exit-Entry Inspection and Quarantine Bureau of the People's Republic of China, Youxi Sifang Drum Co., Ltd., Tianjin Tengda Packaging Co., Ltd., China Packaging Federation.
The main drafters of this standard: Zhang Youlong, Wang Xiaobing, Jiang Yanglong, Su Linfeng, Mei Jian, Zhu Liping, Tang Lijun, Sun Jiacai, Zhang Chengzhi, Du Qingxin.
The previous versions of the standards replaced by this standard are: GB/T13251-1991, G13/T13251-2002. 1
1 Scope
Embedded flange closure for steel drums
GB/T 13251-2008
This standard specifies the requirements, design and structure, test methods, inspection rules, packaging, marking, transportation and storage of embedded flange closures for steel drums (hereinafter referred to as closures). This standard applies to the design, manufacture and inspection of closures. 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, its subsequent amendments (excluding errata) or revised versions are not applicable to this standard. However, the parties to the agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, its latest version applies to this standard. GB/T191 Pictorial marking for packaging, storage and transportation (GB3/T191-2008 ISO780:1997, MOD) GB/T912 Hot-rolled thin steel plates and strips of carbon structural steel and low alloy structural steel GB/T2828.1 Sampling inspection procedures for attributes Part 1: Sampling plan for batch inspection based on acceptance quality limit (AQL) (GB/T 2828,1-2003, ISO 2859-1:1995, IDT) GB/T4956 Measurement of the thickness of non-magnetic blue layer on magnetic substrates by magnetic method (GB/T49562003,
IS0 2178:1982,IDT)
GB/T730755\Non-sealed pipe thread (GB/T7307.--2001,qV1SO228-1:1994)GB/T11253Cold-rolled thin steel plates and strips of carbon structural steel and low alloy structural steelGB/T13040Packaging termsMetal containers
3Terms
The terms and definitions established in GB/T13010 and the following terms and definitions apply to this standard. 3.1
Inserted langr-type closureInserted langr-type closure is a device that uses thread locking and barrel plug closure, and other metal or synthetic materials such as synthetic rubber parts to ensure the sealing of steel drums. 3.2
Synthetic rubber elastomer
Polymer material that can quickly restore its original size and shape after being deformed by a certain pressure when the pressure is eliminated. 3.3
Thermoplastics
A plastic that has the ability to change repeatedly within a certain temperature range, that is, a plastic that becomes soft when heated and hardens when cooled, and can be repeatedly deformed in a soft state during molding, extrusion or forming. 4 Classification
4.1 The closures are divided into three types according to the thread: G2, C3/4 and G4. 4.2 The closures are divided into two types according to the flange type: A-type closures and B-type closures. 5 Requirements
5.1 Basic requirements
5.1.1 The structural dimensions of the closures shall comply with the provisions of Tables 2 to 9. 1
GB/T 13251--2008
5.1.2 The surface of the closure shall be smooth and flat, with uniform wall thickness and no cracks, burrs, missing edges, no wrinkles, no deformation, no rust and other defects. 5.1.3 The seals should be complete and can be replaced five times; they should fit tightly after assembly without any looseness. 5.2 Thread requirements
The nominal diameter and thread size definition of G2, (G3/4 and (4) closures shall comply with the provisions of GB/T7307. The thread of the closure shall be smooth, complete and free of damage: ensure that there are five changes and at least 3 full teeth to ensure good meshing. 5.3 Requirements for the surface of flanges and barrel plugs
The surface of flanges and barrel plugs shall be galvanized or coated with paint. The coating layer shall be smoothed first without blistering. The thickness of the zinc layer shall not exceed 1 μm, and the coating thickness shall not exceed 20 μm. There shall be no other defects that affect the use. If there are other requirements, the supply and demand parties shall agree. 5.4 Material requirements
5.4.1 The materials used for the flanges and barrel plugs of the closure shall comply with the provisions of GB/T912 or CB/11253, and the materials with quality not lower than that specified in the above standards may also be used.
5.4.2 The materials used for gaskets and linings shall be determined by the supply and demand parties. to be agreed upon by both parties. 5.5 Hygiene requirements
The closures used on barrels for food, medicine and food additives shall comply with the Food Hygiene Law and relevant standards. 5.6 Performance requirements
The performance requirements of closures are shown in Table 1.
Table 1 Performance requirements of closures
Airtightness test/kPaWww.bzxZ.net
Hydraulic test/kPa
Barrel torque test/Nm
Design and structure
6.1 Flange
The flange should be embedded and ensure sealing after embedding. 6.2 Drum plug
The design of the plug should be easy to install with simple tools, and there should be a position on the inner plug that allows the lever to be inserted. See Appendix A for details. 6.3 Cover
After the cover is put on, it can fit tightly to prevent loosening and strengthen the protection of the cover. The cover design should be easy to open with simple tools, 6. 4 Type A closure
6.4.1 The structure of Type A closure is shown in Figure 1, and the assembly dimensions of Type A flange are shown in Table 2. Table 2 Assembly dimensions of Type A flange
68.5+0.50
Unit: millimeter
13.510.50
11. 5+0.50
Flange;
-Barrel plug:
Cap:
Orange top.
Structure and size of flange
222227727727247
Figure 1A type closure
GB/T13251—2008
The structure of flange is shown in Figure 2, and the specifications and dimensions are shown in Table 3. If the flange structure and specifications are different, they shall be specified in the contract. Figure 2 Flange structure
Table 3 Flange specifications and dimensions
62.3±0. 2
29.0±0. 2
60. 4±0. 2
27.2±0.2
123.6±0.2121.4±0.2
10.2±0. 4
8. 6±0. 4
77.8±0.2
43,5±0.2
82.1±0.2
46.2±0.2
Unit is side
diSize conforms to
GB/T7307
GB/T13251-—2008
6.4.3 The structure and size of barrel race
G2 four-weld point barrel plug, six-weld point barrel plug and G3/1 two-weld point barrel plug are shown in Figure 3 and Table 4. ep
a) G2 four-weld point plug
c) G2 six-weld point barrel plug
Figure 3 Barrel plug structure
Table 4 Barrel plug specification and size
28. 4 t0. 3
127. 0±0. 3
6.5B type closure
56.0上03
1141.7+0.3
15.4±0,3
13.6±0.3
6.5.13 type closure assembly structure is shown in Figure 4, and the B type law piece assembly size is the same as Table 2. b) G3/4 two-weld point barrel
reverse position is mm
di scale conforms to
GB/T 7307
-flange;
barrel plug;
gasket;
4 Figure;
cover;
barrel item.
Figure 4B type closure
6.5.2 The structure of the flange is shown in Figure 5, and the specifications and dimensions are shown in Table 5. Figure 5 Flange structure
Table 5 Flange specifications and dimensions
62. 3±0. 260, 4±0,21
10.2±0. 4 118.7±0,3
77.8±0.282.1±0.2
29. 0+0. 227. 2+0. 2 8. 6+0. 1 115. 7+0. 3 13. 5+0. 246. 2±0. 2123. 6±0.2121.4±0. 2
150 on 0.2
For the structure and size of the barrel plug, see Type A 6.4. 3 Structure and size of barrel plug, 6.5.3
6.6 Closure thread
The closure thread is G, and the specifications and dimensions are shown in Table 6. 6.7 Structural diagram of the closure
6.7.1 The structure and specifications of the closure are shown in Figure 6 and Table 7R
GB/T 13251—2008
The unit is side
0. 6+n 10
dThe size conforms to
GB/T 7307
GB/T 13251--2008
6.8 Flange bushing and barrel plug gasket
Table 6 Specifications and dimensions of closure thread
Upper deviation" Lower deviation
--1.65119.78
Upper deviation
Lower deviation
Indentation line
Figure 6 Closure structure
Table 7 Specifications and dimensions of closure
Unit: mm
Upper deviation
Lower deviation
Unit: mm
Flange bushing and barrel plug gasket are made of rectangular synthetic rubber material and rectangular thermoplastic plastic material. Their structure and specifications and dimensions are shown in Figure 7, Table 8 and Table 9.
n) Rectangular ring
b)(Shaped ring
Figure 7 Flange bushing and barrel plug gasket structure
Specification name
G2 gasket
G3/4 gasket
C2 village ring
G3/4 bushing
Specification name
G2 bushing
G3/4 village ring
G2 gasket figure
G3/1 ring
Test method
Table 8 Flange bushing and barrel plug gasket (synthetic rubber) specifications Inner diameter
50.0+0. 5
20.0±0.5
60.5±0.5
27. 5 ±1. 5
121.3+0.5
Rectangular ring
Table 9 Flange lining and barrel plug gasket (thermoplastic) Specifications Dimensions Inner diameter d
60. 5±0. 5
28.810. 5
55. 410. 5
116上0.3
Structural dimensions, appearance and assembly quality
Inspected by hand, visual inspection and general measuring tools, 7.2 Closure combined airtightness test
2. 7±0. 2
Rectangular ring
2.4上0.2
GB/T 13251—2008
Unit: mm
Heart-shaped ring
3. 0±0.2
Unit: mm
Press the test piece as shown in Figure 8, and pass compressed air to the specified value. Fill the groove with sterilizing water and observe whether there is leakage. 7.3 Hydraulic test of closure combination
Press the test piece as shown in Figure 8, and pass water. Press to the specified value and keep for 5 minutes to observe whether there is leakage. Pressure plate
Bottom force gauge
Jig body
Plug-type closure plastic rubber pad
Connection adjustment
Figure 8 Illustration of airtight and hydraulic test of closure combination 7.4 Torque test of closure barrel plug
Torque test of welding point of closure barrel plug According to the torque test value in Table 1, the torque value of barrel plug assembly steel barrel is shown in Table A.2 in Appendix A.7.5 Surface coating of closure Coating thickness inspection
Inspection shall be carried out in accordance with the method specified in GB/T4956. 7
GB/113251—2008
7.6 Thread
The barrel thread major diameter and flange thread minor diameter of the closure shall be inspected with a universal gauge, and other parameters shall be comprehensively inspected with a thread working gauge. The manufacturing dimensions and allowable deviations of the thread working gauge are shown in Appendix B. 8 Inspection rules
8.1 The quality supervision department of the manufacturer shall inspect the products in accordance with the provisions of this standard. 8.2 The closures shall be inspected batch by batch. The manufacturer shall regard the daily production volume as a batch, and the user shall regard the delivery volume as a batch. The inspection batch shall consist of unit products of the same model, grade, type and basically alternate production conditions. 8.3 According to the sampling plan of CB/T 2828.1, the normal inspection-second sampling plan shall be selected. 8.4 For the inspection items specified in 5.1 and 5.6, the inspection level is specified as special inspection level S-2 and the qualified quality level is 2.5. The number of samples to be drawn shall comply with the provisions of Table 10.
Table 10 Number of samples to be drawn for inspection level S-2 and AQL2.5 Positive belt - single random inspection
Batch range
[~35 000
Number of samples
I.-S 2 AQL-2.5
Number of qualified judgments
Number of unqualified judgments
Number of samples
Tightened single random inspection
IL=S-2AQL=2.5
Number of qualified demarcations
Number of unqualified judgments
8.5 For the remaining inspection items specified in Chapter 5, the inspection level is specified as special inspection level S-2, the qualified quality level is 6.5, and the number of samples to be drawn shall comply with the provisions of Table 11. Table 11 Inspection level S-2 and AQL6.5 Number of samples taken Normal-single sampling
Batch range
1~-150
151~-35 000
35 co1
8.6 Decision rule
Number of samples
IL--S-2 AQL=6.5
Number of qualified judgment
Number of unqualified judgment
Number of samples
Strict single bundle inspection
II--S-2AQL,-6.5
Number of qualified judgment
Number of unqualified judgment
8.6.1 Inspect the inspection items specified in 5.1 and 5.6 in turn. If one of the items is unqualified, the sample is judged as unqualified. When the number of unqualified products is greater than or equal to the number of unqualified judgments specified in Table 10, the batch of products is judged to be unqualified. 8.6.2 The remaining inspection items specified in Chapter 5 shall be inspected in turn. If one of the items is unqualified, the sample shall be judged to be unqualified. When the number of unqualified products is greater than or equal to the number of unqualified judgments specified in Table 11, the batch of products shall be judged to be unqualified. For unqualified batches, unqualified products can be removed or repaired, and then resubmitted for inspection in accordance with the provisions of 7.1 to 7.6. The sampling plan is carried out according to the strict inspection and one-time sampling plan. If it is still unqualified, the batch is unqualified.
9 Marking, packaging, transportation and storage
9.1 The marking of the closure shall be in accordance with the provisions of GB/T191. 9.2 The closure shall be packed in an outer box or bag during transportation to prevent bumping and deformation. 9.3 When storing the closure, attention should be paid to preventing rain, moisture and rust. 8
A.1 Barrel spanner for closure
Appendix A
(Informative Appendix)
Schematic diagram of barrel spanner
GB/T13251-2008
For examples of barrel spanner for closure, see Figure A.1 and Figure A.2. For specifications and dimensions, see Table A.1; G4V barrel wrench is in accordance with the requirements of both supply and demand.
Drum plug wrench (for G2) schematic diagram
Fig. 2 Drum plug wrench (for G3/4) schematic diagram GB/T13251—2008
Table A.1 Barrel chamber wrench specifications and dimensions
Unit: mm
During the process of screwing the barrel plug into the flange, the barrel plug wrench is matched with a calibrated torque wrench. The torque value of the barrel plug assembly steel barrel is shown in Table A.2. Table A.2 Drum plug assembly steel barrel torque value|| tt||Steel drum manufacturing
Factory standard
Steel handle filling
Factory standard
Barrel plug gasket
Synthetic rubber
Thermoplastic plastic
Synthetic rubber
Thermoplastic plastic
20～30
G3/4/(Nmn)
15-~25
G4X/(Nm)
15 ～25
30~-40
30--40
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