First of all, the quota is divided into: outdoor piping, indoor piping, flange installation, expansion joint production and installation and other projects. The drainage pipe already includes a breathable cap, so no additional items are needed. If you want to modify or add an item, you can refer to the floor drain installation sub-item and an installation fee will be charged.
Take your place accordingly. What type of engineering quantity should be associated with what quota? First find out the content of the engineering quantity quota that must be applied. Understand the composition of the base price. The quota base price is labor + material + machines. It is now a consumption quota, and consumption is a loss. The loss of each different material is clearly indicated in the quota book. The unit price of the material * the loss isthe quota. price of this material.
Detailed information:
The top cap of the flame-retardant breathable cap is made of flame-retardant aluminum plate and the shell is made of cast aluminum. There are two types of fireproof cores: stainless steel corrugated sheets and aluminum corrugated sheets, which meet the technical requirements of CB-5908-2005. When the tank material expands or oil enters, it will be discharged through the fireproof core corrugated plate. When the oil is discharged from the tank, air is drawn into the tank and all fire sources cannot pass through to ensure the safety of the tank.
The breathing cap should be installed vertically on the top of the tank to ensure pressure balance inside and outside the tank. This guaranteesthe safety of tanks and gas stations. The air permeability of the flame retardant corrugated plate of the breathable cap should be checked regularly to ensure good flame retardant and air permeability properties. When maintaining, unscrew the upper cover of the breathable cap and loosen the screws securing the fire-resistant core. Remove the fire-resistant core and check whether the fire-resistant core is clogged, deformed or rusted. be cleaned or replaced immediately and checked twice a month.
Baidu Encyclopedia - Fire-resistant breathable cap
Repair and maintenance of fire-resistant breathable cap
Used to prevent hydrogen flame from outwards Gap safety equipment. It is made of a solid material (fireproof element) with many small channels or spaces that can allow gas to pass through. The gap or channel of the flame retardant element should be as small as possible, so that when the flame enters the flame arrester, the flame retardant element is divided into several small flame streams due to heat transfer (the gas is cooled). ) and the wall effect, the flame flow is extinguished.
Prevent external flames from entering equipment and pipelines containing flammable and explosive gases or prevent flames from spreading between equipment and pipelines. The flame arrester is designed and manufactured based on the principle that when the flame passes through the narrow pores of the thermal conductor, it goes out due to heat loss.
Detailed information
The top cap of the explosion-proof and flame-retardant vent cap is made of flame-retardant stainless steel plate sprayed with plastic. , and the hull is made of cast aluminum. The fireproof core has corrugated stainless steel plates, which meet technical requirementsspecifications of SY/T0511-96. When the tank material expands or oil enters, it will be discharged through the fireproof core corrugated plate.
When draining the oil from the tankAt the same time, breathe air into the tank and prevent all fire sources from passing through to ensure safety. The air permeability of the fireproof corrugated sheet metal of the ventilation hood should be checked regularly to ensure good fireproofing and air permeability performance.
Baidu Encyclopedia - Explosion-Proof and Flame-Retardant Vent Caps
Baidu Encyclopedia - Flame-Retardant Vent Caps
Respirators with Fire Protection and Cutting -fire The difference between breathable caps
The air permeability of the flame retardant corrugated plate of the breathable cap should be checked frequently to ensure good flame retardant and breathable performance. When servicing, unscrew the upper hood coverhon breathing and loosen the screws securing the fire resistant core. Remove the fire-resistant core and check whether the fire-resistant core is clogged, deformed or rusted. be cleaned or replaced immediately and checked twice a month.
There are some differences between the two, but they are both safety features.
The flame arrester is generally installed in the pipeline carrying combustible gas, or on the ventilated tank. It is a device that prevents the propagation of the flame (deflagration or detonation). It consists of a flame-arresting core, a flame-arresting shell and accessories.
The flame retardant vent cap is a safety device used to prevent the hydrogen flame from spreading outward. It is made of a solid material (fireproof element) with many small channels or spaces that can allow gas to pass through. The gap or channel of the flame retardant element should be as smallit as possible, so that when the flame enters the flame arrester, the flame retardant element is divided into several small flame streams due to heat transfer (the gas is cooled). ) and the wall effect, the flame flow is extinguished.