The length specification requirements of metal hoses are mainly based on Article 10.2.8 of the "Urban Gas Design Code" GB50028-2006 and the "Urban Gas Technical Code" GB 50494-2009. The specific provisions are as follows:
Household gas appliance connection: When the hose is connected to the household gas appliance, its length should not exceed 2 meters, and there should be no interface.
Mobile industrial gas appliance connection: When the hose is connected to the mobile industrial gas appliance, its length should not exceed 30 meters, and the number of interfaces should not exceed 2.
Purpose and installation requirements of metal hoses
Metal hoses are mainly used for wire and cable protection and civil shower hoses. Its installation requirements include:
Length limit: The wire protection tube between the steel pipe and the electrical equipment and appliances should be a metal hose or a flexible metal wire protection tube. The length of the metal hose should not be greater than 2 meters.
Purpose: Metal hoses can be used as wire and cable protection tubes and civil shower hoses, with flexibility and support elasticity.
Material and performance requirements of metal hoses
The material of metal hoses is usually stainless steel, copper or iron, with an inner diameter ranging from 3mm to 150mm. There are no cracks or serious brushing at the internal and external joints, and the length is not less than 3 meters.