One. Overview

Liquefied gas crane tube is a crane tube used for liquefied petroleum gas loading and unloading operations. Liquefied gas, also known as liquefied petroleum gas (LPG), is a colorless volatile liquid obtained from natural gas or petroleum under pressure and temperature in a refinery. It is easy to ignite spontaneously. When its content in the air reaches a certain concentration range, he can explode when exposed to open flames. Therefore, special loading crane tubes are required for closed loading and unloading operations.

Parameters

Design pressure: 2.5MPa; Test pressure: 3.75MPa

Design temperature: -40 ℃ ～ + 60 ℃

Transport medium: liquefied gas

Takeover flange standard: HG20594-97

Nominal size: liquid phase: PN2.5 DN50; gas phase: PN2.5 DN25

Pick-up form: copper quick connector

Three. Structure

Column: Supports and supports the turning moment when the arm is deployed

Rotary joint: It is composed of rotating parts and seals. It is mainly used to connect different components of the liquid loading arm for relative rotation and can bear the load.

Inner arm: used to connect the conveying pipe and connect with the outer arm

Outer arm: It can rotate in the range of horizontal and vertical planes. It is mainly used for loading and unloading parts that adjust the working position with the tank car and tank ship.

Balancer: A component used to balance the torque of the outer arm

Quick Couplings: Manual or hydraulically driven components that can be quickly connected to the tanker or tanker interface

Ball valve: manual control loading and unloading switch

Pull-off valve (optional): emergency release valve for connecting to the car tank interface

4. Material

Pipe: 304; Ball valve: 304; Quick connector: Copper

Rotary joint: outer ring 30CrMo or 45 steel, inner ring 304, flange 304

Main sealing ring: PTFE, skeleton 304

Crane tube selection parameter table