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复合型密封垫片材料
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GBT 41487-2022
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标准编号: GB/T 41487-2022 (GB/T41487-2022)
中文名称: 复合型密封垫片材料
英文名称: Composite sealing gasket material
行业: 国家标准 (推荐)
中标分类: Q69
国际标准分类: 23.040.80
字数估计: 11,126
发布日期: 2022-04-15
实施日期: 2022-11-01
起草单位: 成都俊马密封科技股份有限公司、滨州双峰石墨密封材料有限公司、咸阳非金属矿研究设计院有限公司、顺德职业技术学院、浙江瑞洲科技有限公司、舟山市质量技术监督检测研究院、浙江国泰萧星密封材料股份有限公司、咸阳海龙密封复合材料有限公司、河北亨达密封材料有限公司、中国建材检验认证集团咸阳有限公司
归口单位: 全国非金属矿产品及制品标准化技术委员会(SAC/TC 406)
提出机构: 中国建筑材料联合会
发布机构: 国家市场监督管理总局、国家标准化管理委员会
GB/T 41487-2022: 复合型密封垫片材料
GB/T 41487-2022 英文名称: Composite sealing gasket material
ICS 23.040.80
CCSQ69
中华人民共和国国家标准
1 范围
本文件规定了复合型密封垫片材料的分类与标记、要求、试验方法、检验规则和标志、包装、运输、贮存。
本文件适用于制作密封垫片的金属芯材两面复合的非金属材料(不包括含有石棉成分的材料)。本
文件不适用于金属橡胶板和金属芯材多层复合非金属材料。
2 规范性引用文件
下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中,注日期的引用文
件,仅该日期对应的版本适用于本文件;不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T 191 包装储运图示标志
GB/T 540-2008 耐油石棉橡胶板试验方法
GB/T 6682 分析实验室用水规格和试验方法
GB/T 8170 数值修约规则与极限数值的表示和判定
GB/T 20671.1-2020 非金属垫片材料分类体系及试验方法 第1部分:非金属垫片材料分类体系
GB/T 20671.3 非金属垫片材料分类体系及试验方法 第3部分:垫片材料耐液性试验方法
GB/T 30709 层压复合垫片材料压缩率和回弹率试验方法
GB/T 30710 层压复合垫片材料蠕变松弛率试验方法
5 要求
5.1 外观质量
复合型密封垫片材料的表面应平整,不应有裂纹、分层、杂质、气泡、划痕等影响使用的缺陷。
5.2 尺寸及偏差
5.2.1 复合型密封垫片材料的长度、宽度根据用户要求,其允许偏差为±5mm。
5.2.2 复合型密封垫片材料的厚度允许偏差应符合表1规定。如果用户对厚度偏差有特殊要求时,按
用户要求执行。
5.3 性能
5.3.1 抄取法无石棉金属复合板的性能要求应符合表2规定。
5.3.3 柔性石墨金属复合板的性能要求应符合表4规定。
6 试验方法
6.1 试样制备和调节
根据试验要求在复合型密封垫片材料上裁取一定尺寸的试样,试样应边缘整齐,无皱折、分层、明显划痕和杂质等缺陷。
复合型密封垫片材料性能要求测试用样品若无特殊说明都应放在100℃±2℃的烘箱内调节1h,
然后移至干燥器中冷却至21℃~30℃,再进行测试。
6.2 外观质量
外观质量采用目测方法检查。
6.3 尺寸
6.3.1 长度和宽度
长度和宽度用分度值为1mm的直尺或卷尺测量。分别在板材的边缘及中部测量,以3处测量数
据的算术平均值作为长度及宽度的测量结果。
6.3.2 厚度
厚度的测量按GB/T 20671.1-2020第5章中7型材料的规定执行。分别在板材的长度和宽度方
向距边缘10mm~20mm的范围内各测量3点,共测量6个点。同一张板材6个测量点最大值和最小
值的差值作为厚度差的报告值,6个测量点的平均值作为厚度的报告值。
6.4 压缩率、回弹率
按GB/T 30709的规定进行。
6.5 蠕变松弛率
按GB/T 30710的规定进行。
6.6 浸渍IRM903油后性能
按GB/T 20671.3的规定进行。
6.7 浸渍ASTM燃料油B后性能
按GB/T 20671.3的规定进行。
6.8 浸渍蒸馏水+乙二醇(50∶50)后性能
6.8.1 试剂和设备
6.8.1.1 乙二醇:分析纯。
6.8.1.2 蒸馏水:符合GB/T 6682规定。
6.8.1.3 量筒:100mL。
6.8.1.4 天平:感量不大于0.001g。
6.8.1.5 测厚仪;压头直径6.4mm±0.13mm,试样上的压强80.3kPa±6.9kPa。
6.8.1.6 电热干燥箱:室温~200℃,控温精度±2℃。
6.8.1.7 干燥器。
6.8.1.8 烧杯:300mL。
6.8.2 试验步骤
6.8.2.1 裁取40mm×40mm的试样3片,按6.1进行调节。
6.8.2.2 准确称量试样质量(精确至0.001g),作为浸渍前的质量;再在试样的四角和中心测量5点厚
度并标记,作为浸渍前的厚度。
6.8.2.3 用量筒量取乙二醇和蒸馏水各100mL,倒入烧杯中混匀。
6.8.2.4 将试样放入盛有乙二醇和水(50∶50)的烧杯中,盖上表面皿,将烧杯置于130℃±2℃电热干燥箱内,保持5h。
6.8.2.5 取出试样并立即浸入新配制的温度为21℃~30℃的乙二醇和水(50∶50)溶液中,放置30min。
6.8.2.6 取出试样并立即用定性滤纸吸去试样表面多余的液体。吸去多余液体时要小心操作,不能挤压试样。
6.8.2.7 按6.8.2.2称量试样浸渍液体后的质量,在原测量点测量试样浸渍液体后的厚度。
6.8.3 结果计算
6.9 热老化性能
6.9.1 仪器设备
6.9.1.1 天平:感量不大于0.001g。
6.9.1.2 测厚仪:压头直径6.4mm±0.13mm,试样上的压强80.3kPa±6.9kPa。
6.9.1.3 电热干燥箱:0℃~200℃,精确度±2℃。
6.9.1.4 干燥器。
6.9.2 试验步骤
6.9.2.2 准确称量试样(精确至0.001g),作为老化前的质量;再在试样边缘的四角和中心测量5点厚
度并标记,作为老化前的厚度。
6.9.2.3 将试样放入140℃±2℃电热干燥箱内,保持5h。
6.9.2.4 取出试样,在干燥器内放置30min。
6.9.2.5 按6.9.2.2称量试样老化后的质量,在原测量点测量试样的厚度。
7.4 判定规则
7.4.1 复合型密封垫片材料的外观和厚度按表5检查判定。检验项目中任何一项不符合第5章的要求
时,应加倍取样对该项进行复验,以复验结果为准。
7.4.2 当所有项目的检验结果,均符合第5章要求时,则判定该批产品合格,反之判为不合格。
8.1 标志
8.1.1 复合型密封垫片材料上可根据客户要求印刷制造厂名称和/或注册商标。
8.1.2 每个包装单元内应附有产品合格证明。内容包括:产品标记、检验结果、检验日期、检验员或检
验部门名章、制造厂名称。
8.1.3 每个包装单元的外包装上应印刷制造厂名称、地址、产品标记、长宽尺寸、净质量等内容。外包
装图示标志应符合GB/T 191规定。
8.2 包装复合型密封垫片材料应以衬有防潮纸或塑料纸的箱装或捆装。
8.3 运输运输中应防雨、防潮、防晒、防破损。
8.4 贮存
许日光直接照射,远离热源。
8.4.2 抄取法无石棉金属复合板和辊压法无石棉金属复合板的贮存有效期为18个月。
GB/T 41487-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.040.80
CCS Q 69
Composite sealing gasket material
复合型密封垫片材料
ISSUED ON: APRIL 15, 2022
IMPLEMENTED ON: NOVEMBER 1, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and Definitions ... 5
4 Classification and marking ... 5
5 Requirements ... 5
6 Test methods ... 8
7 Inspection rules ... 13
8 Marking, packaging, transportation, and storage ... 15
Composite sealing gasket material
1 Scope
This document specifies the classification and marking, requirements, test methods,
inspection rules and marks, packaging, transportation, and storage of composite sealing
gasket materials.
This document applies to the non-metallic materials (excluding materials containing
asbestos) that are compounded on both sides of the metal core material for making the
sealing gasket. This document does not apply to multi-layer composite non-metallic
materials of metal rubber sheets and metal core materials.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 191 Packaging -- Pictorial marking for handling of goods
GB/T 540-2008 Test methods for oil-resisting compressed asbestos fibre jointing
GB/T 6682 Water for analytical laboratory use -- Specification and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgement
of limiting values
GB/T 20671.1-2020 Classification system and test methods for nonmetallic gasket
materials -- Part 1: Standard classification system for nonmetallic gasket materials
GB/T 20671.3 Classification system and test methods for nonmetallic gasket
materials -- Part 3: Standard test method for fluid resistance of gasket materials
GB/T 30709 Standard test method for compressibility and recovery of laminated
composite gasket materials
GB/T 30710 Standard test method for creep relaxation of laminated composite
gasket materials
3 Terms and Definitions
There are no terms and definitions that need to be defined in this document.
4 Classification and marking
4.1 Classification
Composite sealing gasket materials are divided into 3 categories according to the non-
metallic materials to be composited, namely beater addition asbestos-free metal clad
plate (CJ), rolled asbestos-free metal clad plate (GJ), and flexible graphite metal clad
plate (MJ).
Beater addition asbestos-free metal clad plate, rolled asbestos-free metal clad plate, and
flexible graphite metal clad plate are divided into two types according to the composite
form, namely metal clad truss plates (C) and metal clad plane plate (P).
4.2 Marking
The mark of composite sealing gasket materials consists of product name, document
number, category, and nominal thickness.
For example:
The beater addition asbestos-free metal clad truss plate (CJC) with a thickness of 1.0 mm
Marked as: Composite sealing gasket material GB/T XXXXX-CJC-1.0.
5 Requirements
5.1 Appearance quality
The surface of the composite sealing gasket material shall be flat, and there shall be no
defects such as cracks, delamination, impurities, bubbles, and scratches, which affect
the use.
5.2.1 The length and width of the composite sealing gasket material shall be based on
user requirements, and the allowable deviation is ±5 mm.
5.2.2 The allowable deviation of the thickness of the composite sealing gasket material
shall meet the requirements in Table 1. If the user has special requirements for thickness
deviation, it can be processed according to the user’s requests.
6 Test methods
6.1 Specimen preparation and conditioning
According to the test requirements, cut a sample with certain dimensions from the
composite sealing gasket material. The edge of the sample shall be neat and free of
Unless otherwise specified, the sample for the performance requirement test for
composite sealing gasket material shall be conditioned in an oven at 100 °C±2 °C for 1
hour, moved to a dryer, and cooled to 21 °C~30 °C; then, carry out the test.
6.2 Appearance quality
Check the appearance quality by a visual inspection.
6.3 Dimensions
6.3.1 Length and width
The length and width shall be measured with a ruler or measuring tape with a graduation
value of 1 mm. Measure at the edge and the middle of the plate respectively, and take
length and width.
6.3.2 Thickness
The measurement of thickness shall be carried out according to the provisions of Type
7 material in Chapter 5 of GB/T 20671.1-2020. Measure 3 points within the range of
10 mm~20 mm from the edge in the length and width directions of the plate respectively;
that is, measure 6 points in total. Use the difference between the maximum value and
the minimum value of the 6 measurement points of the same plate as the reported value
of thickness difference, and take the average value of 6 measurement points as the
reported value of thickness.
The test shall be carried out according to the provisions of GB/T 30709.
6.5 Creep relaxation rate
The test shall be carried out according to the provisions of GB/T 30710.
6.6 Performance after impregnation in IRM903 oil
The test shall be carried out according to the provisions of GB/T 20671.3.
6.7 Performance after impregnation in ASTM fuel oil B
The test shall be carried out according to the provisions of GB/T 20671.3.
6.8 Performance after impregnation in distilled water + ethylene glycol (50:50)
6.8.1 Reagents and equipment
6.8.1.2 Distilled water: It shall comply with GB/T 6682.
6.8.1.3 Graduated cylinder: 100 mL.
6.8.1.4 Balance: The sense quantity shall not be more than 0.001 g.
6.8.1.5 Thickness gauge: The diameter of the indenter shall be 6.4 mm±0.13 mm, and
the pressure on the sample shall be 80.3 kPa±6.9 kPa.
6.8.1.6 Electric drying oven: The temperature shall be ~200 °C, and the temperature
control accuracy shall be ±2 °C.
6.8.1.7 Dryer.
6.8.1.8 Beaker: 300 mL.
6.8.2.1 Cut 3 samples with the size of 40 mm×40 mm; carry out the conditioning
according to 6.1.
6.8.2.2 Accurately weigh the mass of the sample, and the weight shall be accurate to
0.001 g; take it as the mass before impregnation; then, measure the thicknesses of 5
points at the four corners and the center of the sample, and mark them as the thicknesses
before impregnation.
6.8.2.3 Measure 100 mL each of ethylene glycol and distilled water with a graduated
cylinder, pour them into a beaker, and mix well.
6.8.2.4 Put the sample into the beaker containing ethylene glycol and water (50:50),
and keep it in the drying oven for 5 h.
6.8.2.5 Take out the sample and immediately immerse it in a newly prepared solution
of ethylene glycol and water (50:50) at a temperature of 21 °C~30 °C, and keep the
sample in it for 30 min.
6.8.2.6 Take out the sample and immediately absorb the excess liquid on the surface of
△d1 --- Thickness change rate;
d4 --- The thickness of the sample after aging, in millimeters (mm);
d3 --- The thickness of the sample before aging, in millimeters (mm).
Take the arithmetic mean of the thickness change rate measurement values of 5 points
of 3 samples as the test result, and the result shall be rounded to 3 significant figures
according to GB/T 8170.
6.10 Corrosion to metallic materials
The test shall be carried out according to the provisions of Chapter 4 in GB/T 540-2008.
6.11 Stripping performance
6.11.1 Instruments and equipment
6.11.1.1 Electric drying oven: 0 °C~200 °C; the accuracy shall be ±2 °C;
6.11.1.2 Dryer.
6.11.1.3 Tools.
6.11.2.1 Cut 3 samples with the size of 50 mm×100 mm, and the edges shall be cut
neatly.
6.11.2.2 After placing the sample in an electric drying oven with a temperature of
100 °C±2 °C for 1 h, move it into a dryer and cool it to room temperature.
6.11.2.3 Tear off the non-metallic materials on both sides and observe the surface of the
core board.
6.11.3 Result judgment
Observe the sample by eyes; if the maximum exposed area of the metal core board does
not exceed 25 mm2, it can be judged as qualified; if the maximum exposed area of the
6.12 Weight loss on heating
6.12.1 Specimen
Cut 3 samples with the size of 50 mm × 50 mm; the surfaces of the samples shall be
free of dust and oil pollution. The samples shall be conditioned according to 6.1.
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