This standard specifies the visual or tactile evaluation method (comparison sample method) and evaluation grade of the surface roughness of steel surfaces after abrasive blasting or blasting before painting. This standard is applicable to the evaluation of the surface roughness of steel and other materials after metal or non-metal abrasive blasting or blasting, and is also applicable to the evaluation of the surface roughness requirements of steel before other protective treatments. This standard is applicable to steels whose surface rust removal grade after abrasive blasting or blasting is higher than Sa21/2 grade in GB8923 "Rust grade and rust removal grade of steel surfaces before painting". It can be used as a reference for steels with lower grades. Note: Abrasives include shot abrasives and angular abrasives. GB/T 13288-1991 Evaluation of surface roughness grade of steel before painting (comparison sample method) GB/T13288-1991 Standard download decompression password: www.bzxz.net

UDC 669. 14 - 621. 7. 015
National Standard of the People's Republic of China
GB/T 13288-~91
The assessment of profile grades of steel surfacebefore application of paint andrelaled products Comparator
Published on December 13, 1991
Implemented on October 1, 1992
Published by the State Administration of Technical Supervisionwww.bzxz.net
National Standard of the People's Republic of China
The assessment of profile grades of steel surfacebefore application of paint andrelaled products Comparator This standard refers to GB/T13288-9: Surface treatment of steel before painting. 1.1 This standard specifies the surface roughness evaluation method (north face method) and evaluation grade of the surface roughness of the coated copper material after instantaneous and blasting cleaning. 1.2 This standard is applicable to the evaluation of the surface roughness of steel and other materials after spraying and blasting with metal and non-metal materials, and is also applicable to the surface roughness of steel products after other anti-donkey treatment. 1.3 This standard is not applicable to steels with a surface rust removal grade after spraying and blasting treatment that is higher than the rust impact grade and dangerous rust grade of the surface of the material before painting in GE89234. It can be used for reference for steels below this grade. Note: The sample and foam material of the board are low-grade and bubble-shaped. 2 Reference standards: G36923 Surface treatment of painted materials and rust removal, etc. GB3505 Surface roughness technique and its parameters GB6062 Stylus surface roughness measurement and recorder and medium-precision wheel gauge G6.5 Surface roughness comparison sample shot blasting, sandblasting surface 3.1 This standard divides the surface of steel before installation and the surface formed after blasting and blasting into two roughness textures. These textures are defined by text standards: 32 The roughness parameters used in this standard are the total maximum height value R in GB3505. 3.3 Roughness levels, other classifications can be seen in Table 1, Table 1
Steel material with slight roughness! The presented material is changed in the environment and the surface is as good as the market. The product is still in the sample 1. The product is between the sample 1 and the sample 2. The solid type is between the adjacent books of the National Hao Technical Supervision Bureau: 997-12-13 approved by the rough and slow female sensitive water,
nine-shaped dense structure
control and shoot common source machine
1592-1001 real bottle
GA/T13288·.91||t t||The material shown in the table is between the roughness of the block 2 and the sample 1, and the roughness of the pull piece shown in this table should be the same as the roughness of the block 3, or the same as the sample 4. The sealing table also shows the roughness of the block or the sample 3. Please note that 1 is the age of the sample, etc., and it is a generation of industrial products. 4 Assessment method
and the reference value R.
shapeless material
7n-10n
light fish care
4:1 standard is to use the standard appearance of the material to determine the degree of roughness. When determining these degrees, the test is carried out under natural light, especially the self-reflective light, and when necessary, a magnifying glass with a magnification of not more than 7 can be used. 4.2 Clear the floating and wet surfaces on the surface of the steel material to be tested. 4.3 Determine the number of assessment points on the surface of the steel material to be tested. Generally, there should be at least one assessment point per 2m surface area, and the area of ​​each assessment point should not be less than 5cm mm
4.4 Select the corresponding sample block according to the material (see Chapter 5), and compare it with a certain point on the surface of the steel material to be tested, and take the degree of roughness marked on the sample block with the closest appearance to the steel surface as the assessment result. When evaluating the results by casting, it is necessary to observe the surface of the sample and the steel to be tested at the same time: 4.5 If there is still medical concern, the index finger and the sea finger can be disassembled or released on the surface of the sample to be tested: the closest stability grade indicated by the comfort level shall be taken as the evaluation result. 6 When evaluating the results, the original roughness of the steel material shall be indicated and a sample shall be taken to replace the material to be tested. The material of the sample must be the same as that of the material to be tested, and then compared with the property block to determine the grade.
Note: The quality inspection of materials includes the following items: the material surface condition before blasting, the sharp edge produced by cutting and hole forming by machine, etc., the uniform cavity distance,
Once the instrument is used, the value is taken at several sampling locations specified by B02. According to the measured results, the degree of roughness is determined.
5 Roughness standard comparison sample
5.1 This standard includes \S\ sample and \G\ sample 5.1.1 nS\ sample
Used to determine the surface accuracy comparison sample obtained by using shot abrasive or mixed abrasive spraying and blasting. 5.1.2 \G\ is used to evaluate the surface roughness standard comparison sample obtained by using abrasive or mixed abrasive spraying and blasting. 5.2 The S\ sample block and the selected block are composed of small sample blocks respectively. Each small sample block is marked with a number. The nominal value and specification of the corresponding roughness parameter R shall be derived from the current provisions in Table 2. Each small sample block refers to the corresponding roughness parameter R of the scientific research unit C/132B851. The nominal value of the small sample block is allowed to be specified. The nominal value is as follows: The number of samples R listed in Table 2 is 5 consecutive sampling times. The height of the wheel cell is half the mean. Fe
Allowable tolerance
5.3 The manufacturing method of the comparison block, the evaluation of the surface roughness, the size of the structure, the table and the packaging shall comply with the provisions of GB6530.5.
6 Test report
The content and selection of the test report A (supplementary). 4 Test steel number
Evaluation time/comparison point
Evaluation points/question
Material type/pot number
Clearing force method
Chen potassium, etc.
Coarseness and fineness (results
is the test method used in case of dispute
phase grain pressure penetration grade (Jingchao)
cause recognition/dispute reading values
Test period:
Additional instructions:
Time,
Gl/T1328E-91
Coarse and fine or equivalent assessment test report
(supplement)
XXXx-××
? Location:
/ Telephone:
Testers:
This standard is under the jurisdiction of the China State Shipbuilding Corporation Limited
This standard is drafted by the Tenth Research Institute of China State Shipbuilding Corporation, and participated in the preparation by Shanghai Shipyard, Chengshuyan Locomotive and Rolling Stock Technology Research Institute, and the Ministry of Special Energy Design Institute. The drafters of this standard are Huan Jiannuan, Luo Paiguan, Wei Zhonggen, Wo Ximei, and Song Huijun.
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