China Association for Engineering Construction Standardization
Issued on:
2018-01-12
Implemented on:
2018-5-1
Status:
valid
Language:
English
File Format:
PDF
Word Count:
8500 words
Price(USD):
255.0
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Closed expansion vessels with built in diaphragm
1 Scope
This standard specifies the classification and model, material and construction, performance requirements, test methods, inspection rules, marking, instructions for use, packaging, transportation and storage of closed expansion vessels with built in diaphragm (hereinafter referred to as "expansion vessels").
This standard is applicable to closed expansion vessels with normal working temperature not greater than 70°C, maximum working temperature not greater than 90°C, maximum working pressure not greater than 3 MPa and effective volume not greater than 12 L, which are used for heating or water supply systems.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 191 Packaging — Pictorial marking for handling of goods
GB/T 528 Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
GB/T 531.1 Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 1: Durometer method (Shore hardness)
GB/T 1690 Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
GB/T 2941 Rubber — General procedures for preparing and conditioning test pieces for physical test methods
GB/T 2828.1 Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3098.1-2010 Mechanical properties of fasteners — Bolts, screws and studs
GB/T 3098.2-2015 Mechanical properties of fasteners — Nuts
GB/T 3512 Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
GB/T 5781 Hexagon head bolts — Full thread — Product grade C
GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads — Part 1: Parallel internal and taper external threads
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads — Part 2: Taper internal and external threads
GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads
GB/T 7759.1 Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient or elevated temperatures
GB/T 9286-1998 Paints and varnishes — Cross cut test for films
GB/T 10125 Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
clench joints
joint that permanently holds two parts of an expansion vessel together with a separate metal ring
3.2
no rivets riveting
process method in which two metal plates and diaphragms are sealed together in a stamping process by using a special connecting mould and utilizing the plasticity of the material itself
3.3
expansion vessel
expansion tank
tank that absorbs or compensates for changes in water volume due to changes in factors such as temperature by expansion and contraction of a built-in diaphragm separating water and air/nitrogen of pre-flush pressure on both sides, in which the water contained does not contact any other gaseous or liquid medium
3.4
deep drawing
machining method enabling the metal parts of the expansion vessel to form from a flat state into a three-dimensional shape without reducing or increasing raw materials by means of pressure and mould
3.5
diaphragm
flexible or elastic membrane, which is fixed in the expansion vessel in an air-tight way and divides the expansion vessel into water side and air side. The diaphragm includes (closed) air bag diaphragm and (open) cup diaphragm
3.6
experimental test
any form of test used within the framework of a design of experiments method in place of the calculation of an expansion vessel component or the entire expansion vessel
Note: Refer to Annex A for the experimental test.
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and model
5 Materials and construction
6 Performance requirements
7 Test methods
8 Inspection rules
9 Marking and instructions
10 Packaging, transportation and storage
Annex A (Informative) Experimental test
Annex B (Informative) Tests related to diaphragm in production process
Closed expansion vessels with built in diaphragm
1 Scope
This standard specifies the classification and model, material and construction, performance requirements, test methods, inspection rules, marking, instructions for use, packaging, transportation and storage of closed expansion vessels with built in diaphragm (hereinafter referred to as "expansion vessels").
This standard is applicable to closed expansion vessels with normal working temperature not greater than 70°C, maximum working temperature not greater than 90°C, maximum working pressure not greater than 3 MPa and effective volume not greater than 12 L, which are used for heating or water supply systems.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 191 Packaging — Pictorial marking for handling of goods
GB/T 528 Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
GB/T 531.1 Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 1: Durometer method (Shore hardness)
GB/T 1690 Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
GB/T 2941 Rubber — General procedures for preparing and conditioning test pieces for physical test methods
GB/T 2828.1 Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3098.1-2010 Mechanical properties of fasteners — Bolts, screws and studs
GB/T 3098.2-2015 Mechanical properties of fasteners — Nuts
GB/T 3512 Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
GB/T 5781 Hexagon head bolts — Full thread — Product grade C
GB/T 7306.1 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads — Part 1: Parallel internal and taper external threads
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads — Part 2: Taper internal and external threads
GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads
GB/T 7759.1 Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient or elevated temperatures
GB/T 9286-1998 Paints and varnishes — Cross cut test for films
GB/T 10125 Corrosion tests in artificial atmospheres — Salt spray tests
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
clench joints
joint that permanently holds two parts of an expansion vessel together with a separate metal ring
3.2
no rivets riveting
process method in which two metal plates and diaphragms are sealed together in a stamping process by using a special connecting mould and utilizing the plasticity of the material itself
3.3
expansion vessel
expansion tank
tank that absorbs or compensates for changes in water volume due to changes in factors such as temperature by expansion and contraction of a built-in diaphragm separating water and air/nitrogen of pre-flush pressure on both sides, in which the water contained does not contact any other gaseous or liquid medium
3.4
deep drawing
machining method enabling the metal parts of the expansion vessel to form from a flat state into a three-dimensional shape without reducing or increasing raw materials by means of pressure and mould
3.5
diaphragm
flexible or elastic membrane, which is fixed in the expansion vessel in an air-tight way and divides the expansion vessel into water side and air side. The diaphragm includes (closed) air bag diaphragm and (open) cup diaphragm
3.6
experimental test
any form of test used within the framework of a design of experiments method in place of the calculation of an expansion vessel component or the entire expansion vessel
Note: Refer to Annex A for the experimental test.
Contents of T/CECS 10004-2018
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and model
5 Materials and construction
6 Performance requirements
7 Test methods
8 Inspection rules
9 Marking and instructions
10 Packaging, transportation and storage
Annex A (Informative) Experimental test
Annex B (Informative) Tests related to diaphragm in production process
