HG 3097-1989 Specification for rubber seals for hot water delivery pipes below 110℃ HG3097-1989 Standard download and decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Hot water delivery pipes below 110℃
Rubber seal ring material specification
Rubtxer scals joint rings for water supply pipelines up to Hlot -Specification for materials Subject content and scope of application
H/T3097-1989(1997)
Generation GB10709-89
This standard specifies the requirements for rubber seal ring materials for hot water delivery pipes below 110℃. This standard applies to rubber seal rings for pipes including cast iron and steel used for conveying hot water below 110℃. This standard does not include seal rings made of foam rubber materials or other closed-cell structural materials. If there are special performance requirements for the seal ring, it shall be agreed upon by the supply and demand parties. 2 Reference standards
GB527-83 General requirements for physical test methods for vulcanized rubberGB528-82
GB530-81
GB.531-83
GB1682-82
Determination of tensile properties of vulcanized rubber
Determination of tear strength of vulcanized rubber (right angle type) Rubber Shore A hardness test methodbzxz.net
GB1685-82
GB1690-82
CGB2828-87
GB2941-82
GB3512-83
GB3672-83
GB5721-85
GB 5722 - 85
CB5723-85
CB6031-85
GB6032-85
GB7529-87
GB7759-87
3 Classification
Test method for brittle temperature of vulcanized rubber
Determination of compression stress relaxation of vulcanized rubber at room temperature and high temperatureTest method for liquid resistance of vulcanized rubber
Batch inspectionCount sampling procedure and sampling table (suitable for inspection of continuous batches)Standard temperature, humidity and time for parking and testing of rubber specimensTest method for hot air aging of rubber
Rubber solid mold Dimensional tolerances of pressed and extruded products General provisions for marking, packaging and transportation of rubber sealing products General provisions for storage of rubber sealing products
General provisions for dimensional measurement of test pieces and products for vulcanized rubber testing Conventional test method for determination of the international hardness of vulcanized rubber (30-85 IRHD) Micro test method for determination of the international hardness of vulcanized rubber (30-85 IRHD) General provisions for appearance quality of molded and extruded rubber products Determination of permanent compression set of vulcanized rubber under constant deformation at room and elevated temperatures 3.1 The materials specified in this standard are graded according to hardness, and the corresponding preferred nominal hardnesses are 50, 60, 70, 80 and 88 IRHD.
3.2 The product shall be marked with Chinese phonetic initials and Arabic numerals, i.e. "name, hardness grade, manufacturing unit and standard number". Approved by the Ministry of Chemical Industry of the People's Republic of China on February 21, 1989 and implemented on December 1, 1989
Example:
4 Technical requirements
HG/T3097-1989 (1997)
GB ××××-××
Standard number
Manufacturing unit code
Hardness level
Rubber sealing ring materials for hot water delivery pipes
4.1 The raw materials and process conditions used to manufacture the materials shall comply with the relevant technical specifications. 4.2 The materials shall be uniform and consistent, and no impurities larger than 0.2mm are allowed. 4.3 The materials shall not contain substances that are sufficiently harmful to the hot water being transported, the life of the sealing ring, or the pipes and pipe fittings. 4.4 For hot drinking water, the sealing ring shall not damage the water quality under the conditions of use and shall comply with the relevant national health standards. 4.5 The appearance of the sealing ring shall comply with the relevant provisions of Table 1 in GB7529. 4.6 The structure and size of the sealing ring shall comply with the requirements of the drawings, and its dimensional tolerance shall comply with the requirements of M3C grade in GB3672. 4.7 The physical properties of the material shall comply with the requirements specified in the table. Physical properties table of materials
Preferred nominal hardness (IRHD) Grade
Permitted deviation of hardness (IRHD)
Tensile strength
Elongation at break
Compression set in air:
At standard laboratory temperature, 70h
At 125℃, 22h
Performance changes after aging for 7d at 125℃ in air:
Hardness (IRHD)
Tensile strength
Elongation at break| |tt||Water immersion, volume change after immersion in 100C distilled water or deionized water for 7 days
Tear strength
Compression stress relaxation":
At standard laboratory temperature, 7d
At 125℃, 7d
-25℃ low temperature brittleness
HG/T3097-1989 (1997)
Note: 1) This requirement is only applicable when the material directly plays a sealing role. 2) It must be measured and the accumulated number will be supplemented.
5 Test method
Requirements for each level
No cracking
5.1. Samples, the samples should be taken from the product or from the same batch of rubber materials used to manufacture the product and cut from the film with the same degree of vulcanization under similar vulcanization conditions. Dumbbell-shaped test pieces are cut with a type II cutter. 5.2 Appearance The appearance shall be measured by visual inspection and with a measuring tool with an accuracy of 0.02mm. 5.3 Dimensions The dimensions of the products shall be measured in accordance with GB5723. 5.4 Physical properties
Hardness shall be measured in accordance with GB6031, GB6032 or GB531. Tensile strength and elongation at break shall be measured in accordance with GB528. Hot air aging shall be measured in accordance with GB3512
Compression stress relaxation shall be measured in accordance with GB1685. Water immersion shall be measured in accordance with GB1690.
Low-temperature brittleness shall be measured in accordance with GB1682.
Tear strength shall be measured in accordance with GB530.
Compression permanent deformation shall be measured in accordance with GB7759. 6 Inspection rules
6.1 Products of the same specification produced with the same rubber compound and the same production process conditions shall be batched in batches of no more than 500 pieces. 6.2 Appearance shall be inspected one by one.
6.3 Product dimensions and tolerances shall be sampled and inspected from each batch according to the general inspection level II and AQL value 4 in GB2828. 6.4 The four basic physical properties of hardness, tensile strength, elongation at break and compression set shall be inspected at least once a month; other physical properties shall be inspected at least once a quarter. 6.5 If the physical properties or dimensions are unqualified, double the samples shall be taken for re-inspection. If the re-inspection results are still unqualified, the product shall be considered unqualified.
7 Marking, packaging, transportation and storage
7.1 The marking, packaging and transportation of materials shall refer to GB5721. 7.2 The storage of materials shall be carried out in accordance with GB5722.
7.3 Under the conditions of 7.1 and 7.2, the storage period is two years from the date of manufacture. 85
Additional Notes:
HG/T3097-1989 (1997)
This standard is under the jurisdiction of the Northwest Rubber Industry Products Research Institute, the technical unit responsible for rubber sealing products standardization under the Ministry of Chemical Industry. This standard was drafted by the Northwest Rubber Industry Products Research Institute under the Ministry of Chemical Industry. The main drafters of this standard are Jing Liangdong, Fu Baoqiang and Li Wenhu. 86
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