Pipe Fittings 4

Valve Installation Requirements:

1. Before installing the valve, check carefully whether the type and specifications of the valves used are in conformity with the design.

2. Check whether the valve can be used under the required conditions according to the type of valve and the manufacturer's instructions.

3. When lifting the valve, the rope should be tied to the flanged connection between the valve body and the valve cover, and not tied to the handwheel or stem, so as to avoid damaging the stem and the handwheel.

4. When installing valves in horizontal pipelines, the valve stem should be vertical upward, and the downward installation of the valve stem should not be allowed.

5. When installing valves, the forced counterpart connection method of pulling hard and drawing hard should not be adopted to avoid damage due to uneven force.

6. Open-stem gate valve should not be installed in underground damp place to avoid stem corrosion.

Assembly requirements

Clean parts must be sealed for installation.

The requirements for the installation process are as follows:

1. Installation workshop must ensure cleanliness, or build temporary clean areas, such as using newly purchased coloured strip cloth or plastic film, to prevent dust from entering during installation.

2. The assembly workers must wear clean cotton overalls, cotton caps on their heads, no hair leakage, clean shoes on their feet, plastic gloves on their hands, and degrease.

3. Tools for assembly must be degreased and cleaned before assembly to ensure cleanliness.

Acceptance requirements

Acceptance and acceptance follow the HG 20202-2000 "Degreasing Engineering Construction and Acceptance Specification". Before assembly, each component is wiped with clean precision filter paper. The dead corner of the component is selected, and the color of the filter paper remains unchanged to be qualified.