Some standard content:
QB/T 2201--1996
This standard is a revision of QB366-1981 "Steel Paper Tube" based on GB/T1.1--1993 "Guidelines for Standardization Work Unit 1: Drafting and Expression Rules of Standards Part 1: Basic Regulations for Standard Writing". In order to make the steel paper tube meet the use of high and low voltage fuses and lightning arresters and other line bushings of power supply devices, the following revisions have been made on the basis of the original standard: This standard adopts the former Soviet Union's rOCT11945-1978 "Technical Conditions for Steel Paper Tubes" in a non-equivalent manner. - According to GB/T1.1-1993 "Guidelines for Standardization Work Unit 1: Drafting and Expression Rules of Standards Part 1: Basic Regulations for Standard Writing", a reference standard is added to this standard. The technical indicators adopt legal measurement units.
- According to the needs of users, the inner and outer diameters and tolerances of steel paper tubes have been redefined. The inspection sampling rules are carried out in accordance with GB/T2828-1987 "Batch-by-Batch Inspection Counting Sampling Procedure and Sampling Table (Applicable to Continuous Batch Inspection)".
This standard is proposed by the Food Papermaking Department of the China Light Industry Association. This standard is under the jurisdiction of the National Papermaking Standardization Center. The drafting unit of this standard: Mudanjiang Steel Paper Enterprise Group Co., Ltd. The main drafters of this standard: Shi Fuqing and Sun Xiaojun. From the date of implementation of this standard, the former Light Industry Department Standard QB366--1981 "Steel Paper Tube" will be invalid. 403
Light Industry Industry Standard of the People's Republic of China
Steel Paper Tube
This standard specifies the technical specifications of steel paper tubes. This standard is applicable to steel paper tubes for high and low voltage fuses, lightning arresters and other line casings of power supplies. 2 Reference standards
QB/T 2201-1996
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, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 450--1989
Taking samples of paper and paperboard
GB/T 462—1989
GB/T 463---1989
GB/T 1408—1989
GB/T 2828--1987
Determination of moisture content in paper and paperboard
Determination of ash content in paper and paperboard
Test method for power frequency electrical strength of solid insulating materials-Batch inspection-Count sampling procedure and sampling table (applicable to inspection of consecutive batches)GB/T 10342—1989
GB/T 10739—1989
3 Product classification
Paper packaging and marking
Pulp, paper and paperboard
Standard atmosphere for sample handling and testing
3.1 Steel-paper tubes can be divided into two types according to their use: A-type steel-paper tubes and B-type steel-paper tubes. 3.1.1A-type steel-paper tubes are used as materials for high-voltage fuses, lightning arresters and different types of glass fiber reinforced plastic composite tubes. 3.1.2B-type steel-paper tubes are used as materials for low-voltage fuses and other line casings. 4 Technical requirements
4.1 The technical indicators of steel-paper tubes must comply with the provisions of Table 1. Table 1
Indicator name
Axial cross-sectional tensile strength
Not less than
Not less than
Axial withstand voltage (normal test 1min)
Not less than
Vertical wall withstand voltage (normal test
Wall thickness 2.5mm～3.0mm
3. 1mm~5. 0mm
Not less thanwww.bzxz.net
Approved by China Light Industry General Association on March 22, 1996
Implemented on December 1, 1996
Indicator name
5.imm~10mm
10.1mm~15mm
Water absorption rate (immersed in water at 10~25C
2.5mm~3.5mm
3. 6mm~5. 0mm
5.1mm~10mm
Zinc fluoride content
Not more than
Not more than
Not more than
QB/T2201-1996
Table 1 (end)
6～10
6～10
4.2 The length of the steel paper tube is: 620mm, 300mm, or as specified in the order contract, the deviation is not allowed to exceed ±10mm. 4.3 The bending degree of the steel paper tube is based on the length of 250mm and the inner diameter of 25mm The inner diameter of the steel paper tube should be 1.5mm if it is larger than 25mm, and 1.0mm if it is less than 25mm.
4.4 The steel paper tube should have mechanical processing performance. Drilling, cutting, threading, and sawing will not cause cracks, delamination, peeling, etc. The sample should be moisture balanced before processing. The steel paper tube should be placed in standard air with a relative humidity of (50±2)% and a temperature of (23±1)℃ to adjust the moisture content of the steel paper tube to a range of 6%~8%. The processing time is as follows: wall thickness of 3mm or less is not less than 48h; wall thickness of 3.5mm~~6 .0mm for not less than 72h; for wall thickness 7.0mm~10mm for not less than 96h. 4.5 The surface of the steel paper tube should be clean and smooth, without defects such as delamination, blistering, indentation and longitudinal wrinkles. 4.6 Slight wrinkles are allowed on the inner wall surface of the steel paper tube. 4.7 The two ends of the steel paper tube should be cut evenly, without piles and burrs. 4.8 The inner and outer diameters of the steel paper tube should comply with the provisions of Table 2 or according to the provisions of the order contract. Table 2 Inner and outer diameters and tolerances of steel paper tubes
10×16
13×19
13×22
15×21
16×25
17×24
23×31
25×33
5Test method
Allowing tolerance
19×30
22×34
29×44
33×48
44×64
55×78
59×79
Allowing tolerance
The taking of samples shall be in accordance with GB/T450. The processing of samples shall be in accordance with GB/T10739. +1.0
5.1 Tightness test
QB/T 2201-1996
Take at least 3 samples at a distance of not less than 50mm from the edge. The sample size is determined according to the mass, generally about 20g. Accurately weigh the mass and use a vernier caliper with an accuracy of 0.2mm to accurately measure the inner diameter, outer diameter and height of the sample, and calculate its volume. The calculation results are as follows: Tightness -
Mass (g)
Volume (cm2)
5.2 Determination of axial cross-section tensile strength
5.2.1 Sample
(1)
Take the steel paper tube for testing, remove 50mm from the end, and cut a length of (250±2)mm. Process it according to the provisions of Article 4.4 of this standard. Before the test, accurately measure the inner diameter and outer diameter of the sample to an accuracy of 0.05mm for the purpose of measuring the tensile strength. 5.2.2 Test steps
Insert a 50mm long metal bar at both ends of the sample, and the outer diameter of the metal bar is equal to the inner diameter of the sample. Place the sample between the clamps of the tensile machine. After clamping, press the wrench to make the lower clamp move smoothly and evenly, and apply tension at a speed of (50±2)mm/min until the sample breaks. Record the tensile force on the tensile machine, and express the test result as the arithmetic mean of three tests. 5.2.3 Calculation method
Element (D2 d2)
~Axial tensile strength of steel paper tube, kN/m2; where · Q~—
Force required to axially break the steel paper tube, kN; outer diameter of the sample, m;
Inner diameter of the sample, m.
5.3 Determination of axial withstand voltage
Test according to GB/T1408.
5.4 Withstand voltage of vertical wall layer
Tested in accordance with GB/T1408.
5.5 Determination of water absorption
(2)
Tested in accordance with GB/T461.3, and supplemented as follows. Take the steel paper tube for testing, remove 50mm of the end, cut off three samples with a length of (20±2)mm, immerse them in water with a temperature of (20±2)℃ for 24h, wipe off the water on the surface quickly after taking them out, weigh them and calculate the water absorption. G2-G1,
W-water absorption,%;
G---mass of sample before immersion, 8;
G2--mass of sample after immersion, g.
（3）
5.6 Determination of zinc chloride content
Cut the steel paper tube sample into small pieces of 2mmX2mm and weigh 2.5g two portions. One portion is placed in an oven at 100~105℃ and dried to constant weight. The other portion is placed in a 250mL conical flask, and about 150mL of distilled water is added, and then 2~4mL of 3% hydrogen peroxide solution is added, and it is boiled on an electric stove for 15 minutes. The extract is poured into a 250mL volumetric flask, and 150mL of distilled water is added to continue boiling for 15 minutes. The extract is combined in a 250mL volumetric flask, cooled to 20℃, and then diluted to the mark with distilled water. Then 50mL is taken with a pipette, transferred to a 150mL conical flask, 0.4mL of 5% potassium chromate indicator is added, and 0.01mol/L silver nitrate is dripped until it turns orange red. K=exVx0. 068 2X5×100
Wherein: K-
Zinc chloride content, %;
-Volume of silver nitrate consumed, mL;
-Molar concentration of silver nitrate, mol/L;
AMass of dried sample, g;
QB/T2201-—1996
0.0682——Mass of zinc chloride expressed in grams equivalent to 1.00mL standard titration solution c(AgNO,)=1.0mol/L. 5.7Ash content is tested according to GB/T463.
5.8Moisture content is tested according to GB/T462.
6Inspection rules
6.1The supplier shall ensure that the product complies with the provisions of this standard. One delivery is considered as one batch. Each piece shall be affixed with a certificate of conformity and the product quality manual shall be placed in the box.
6.2 Product delivery inspection sampling inspection shall be carried out in accordance with GB/T2828. 6.3 Sample collection and sample processing before inspection shall be carried out in accordance with GB/T450. 6.4 Delivery sampling items, sequence and inspection level, sampling plan and acceptable quality level (AQL) shall be carried out in accordance with Table 3. Table 3
Sampling plan
Batch, root
151~35000
Inspection level S-2
Positive belt secondary sampling plan
Class B non-conforming products
Sample size
Class C non-conforming products
Non-conforming classification
Class B non-conforming
Class C non-conforming
Strength, axial electrical resistance 1 appearance, tightness, water pressure, vertical wall resistance, ash content, zinc chloride voltage
Content, water absorption
6.5 The purchaser has the right to accept according to this standard. If there is any objection to the product, it should notify the supplier within three months after arrival and jointly re-inspect. If it does not meet the requirements of this standard, it will be judged as a batch non-conforming and the supplier will be responsible for handling it. If it meets the requirements of this standard, it will be judged as a batch qualified and the purchaser will be responsible for handling it. 7 Marking, packaging, transportation, storage
7.1 The packaging and marking of the product shall be carried out in accordance with the provisions of GB/T10342. 7.2 The product shall be packed in wooden boxes (other packaging may be used with the consent of the purchaser under the condition of ensuring quality). The weight of each piece shall not exceed 100kg, or according to the provisions of the order contract. The wooden box must meet the following requirements. a) The moisture content of the wooden board used for the wooden box shall not exceed 20%; b) The thickness of the wooden board of the wooden box shall not be less than 10mm, and the wooden belt shall not be less than 20mm. It shall be made solid, with tight joints, and the specifications and volume of the wooden box shall meet the requirements:
c) The wooden box shall be nailed firmly and firmly, and shall not be damaged by the slightest external force. 7.3 The steel paper tube should be stored in a dry place, and the relative humidity should be kept at 60%~70% and the temperature should be kept at 10℃~25℃. It should be placed on a dry floor or wooden rack to prevent the influence of atmospheric condensation and ground moisture. 7.4 The steel paper tube should be transported by clean, canopied transportation vehicles. Wooden boxes are not allowed to be thrown down from a height.
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