Armouring hose for the connection of gas appliance
1 Scope
This document specifies the classification, specifications and models, materials, appearance, structure and dimensions, performance requirements, test methods, inspection rules, markings and installation instructions, packaging, transportation and storage of armouring hose for the connection of gas appliance.
This document is applicable to the conveying medium of city gas, the nominal dimension is not greater than DN15, the maximum working pressure of 0.01 MPa, the use of the ambient temperature of -10°C ~ 70°C indoor gas pipelines or bottled liquefied petroleum gas regulator outlet and the user of the armouring hose for the connection of gas appliance.
This document is not applicable to armouring hose for the connection where the conveying medium contains dimethyl ether.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 196 General purpose metric screw threads - Basic dimensions
GB/T 1220 Stainless steel bars
GB/T 2518 Continuously hot-dip zinc and zinc alloy coated steel sheet and strip
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 3280 Cold rolled stainless steel plate, sheet and strip
GB/T 4240 Stainless steel wires
GB/T 5231 Designation and chemical composition of wrought copper and copper alloys
GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads
GB/T 8815 Plasticized polyvinyl chloride (PVC) compounds for wire and cable
GB/T 9576 Rubber and plastics hoses and hose assemblies - Guidelines for selection , storage, use and maintenance
GB/T 9577 Rubber and plastics hoses and hose assemblies - Rules for marking, package and transportation
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
GB/T 23658 Elastomeric seals - Material requirement for seals used in pipes and fittings carrying gaseous fuels and hydricarbon fluid
GB 44023 Compounded rubber hose for internal use in gas appliance connection
JB/T 8870 Hose clamps
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
armouring hose for the connection of gas appliance
fixed length pipe with connecting joints at both ends, an inner layer of rubber composite hose (referred to as "inner rubber hose"), and an outer layer protected by a coating layer and a flexible metal coating, used for connecting indoor gas pipelines or bottled liquefied petroleum gas regulators to gas combustion appliances
Note: It is referred to as "armouring hose" for short.
4 Classification, specifications, and models
4.1 Classification
4.1.1 Armouring hose can be divided into two types based on the metal armouring form:
a) Braided armouring hose, referred to as "braided hose" for short, code-named B;
b) Armored armouring hose, referred to as "armored hose" for short, code-named K.
Note 1: Braided hose is a metal-coated armouring hose in the form of steel wire braided, which is mainly composed of stainless steel wire braided into a mesh and covered to a rubber composite hose, with an external coating layer.
Note 2: Armored hose is a metal-coated armouring hose in the form of steel belt armor. It is mainly composed of steel belt wound into a hose shape. After the outer coating layer is attached, it is sleeved on the outside of the rubber composite hose.
4.1.2 Armouring hose can be divided into three types based on the interface form of the connection
a) the armouring hose with threaded connection interfaces at both ends, code-named A;
b) the armouring hose whose one end is a threaded connection interface and the other end is a throat clamp locking plug-in connection interface, code-named B;
c) the armouring hose only used to connect gas burning appliances and bottled liquefied petroleum gas pressure regulators, with hose clamp locking plug-in interfaces at both ends, code-named C.
Notes: The structure is shown in annex A.
4.2 Specifications
Armouring hoses are divided into DN10 and DN15 according to nominal dimension.
4.3 Model
The armouring hose model is compiled according to the following rules:
Example 1: One end is a threaded connection interface, the other end is a hose clamp locking plug-in connection interface, the nominal dimension is DN10, the length is 1,000 mm, the braided hose used for the connection of natural gas combustion appliances, the model number is marked as:
RJB-B-TY-B-10×1 000
Example 2: Both ends are hose clamp locking plug-in connection interfaces, the nominal dimension is DN10, the length is 1,500 mm. Armored hose only used to connect gas burning appliances and bottled liquefied petroleum gas pressure regulators, model mark:
RJB-K-TY-C-10×1 500
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification, specifications, and models
4.1 Classification
4.2 Specifications
4.3 Model
5 Materials, appearance, structure and dimension
5.1 Materials
5.2 Appearance
5.3 Structure and dimension
6 Performance requirements
7 Test methods
7.1 Test conditions
7.2 Test apparatus
7.3 Performance test of inner rubber hose
7.4 Performance test of armouring hose
7.5 Performance test of armouring layer
7.6 Joints performance test
7.7 Gas resistance test of sealing gasket
8 Inspection rules
8.1 End-of-manufacturing inspection
8.2 Type inspection
9 Marking and instructions for installation and use
9.1 Marking
9.2 Instructions for installation and use
10 Packaging, transportation and storage
10.1 Packaging
10.2 Transportation
10.3 Storage
Annex A Informative) Schematic diagram of armouring hose structure with different armouring forms and different interface forms
