For gasoline and diesel fuel depots, where pipelines pass through fire dikes, is it necessary to use sleeves? Which specification addresses this?

I also checked, and it seems that no standard requires the installation of \"casing\"!!!!! It only requires that fire-resistant materials be used for sealing!!!!! For reference only!!!! :handshake :victory:

6.0.6 Above-ground oil tank groups shall be equipped with fire dikes, and the installation of such dikes shall comply with the following requirements: 1 The fire dikes shall be constructed from non-combustible materials, and they shall be able to withstand the static pressure of the oil stored within them without leaking. 2 The calculated height of the fire dike for vertical oil tanks should meet the requirements of the effective volume within the dike. The actual height of the fire dike should be 0.2m higher than the calculated height. The actual height of the fire dike should not be less than 1 m (measured from the designed floor level on the inside of the fire dike), and should not exceed 2.2 m (measured from the road surface on the outside of the fire dike). The actual height of the fire dike for horizontal oil tanks should not be less than 0.5 m (measured from the designed floor level on the inside of the fire dike). If a soil fire dike is used, the width of the dike crest should not be less than 0.5m. 3 It is strictly prohibited to make holes in the fire dike. The areas where pipes pass through fire dikes should be tightly filled with non-combustible materials. At the points where rainwater drains pass through firewalls, measures should be taken to prevent oil from entering the drainage system.

It’s described in detail above; to add more, if you decide to make holes, it will be very troublesome, and the fire safety inspections will be difficult to pass, so it’s best not to make any holes

Here, we usually use sleeves; direct sealing hinders the natural expansion and contraction of the pipeline.

If only a sleeve is added without blocking it, will there be leakage?

The casing added also seals between the pores; it’s not just the casing alone that does the job.

As a supplementary point, unrelated pipelines should not pass through the tank farm

GB50351-2005 Code for Design of Fire Dikes in Tank Farm Areas 3.1.3 Access to tank groups. . . . When it is necessary to pass through fire dikes or protective walls, sleeves should be installed, and effective sealing measures should be taken; alternatively, fixed short pipes with both ends sealed using hoses can be used

Moderator, I’ve seen this post too. What exactly does “irrelevant” mean? I’m really puzzled by this irrelevance! Please explain! Thank you!

Current sleeve sealing technology is excellent; as long as the sealing requirements can be met, using sleeves is the best option

Since it is strictly prohibited to make holes in the fire dike, can process pipelines cross the fire dike? Which standards specify this?

It should be the \"Code for Fire Protection Design of Petrochemical Enterprises\", version GB50160-2000; I’m not quite sure. If you have any questions, please send an email to: wdzcl0536@163.com

According to the specifications, a sleeve must be used, and its diameter is generally one size larger than that of the main pipe

Add a elbow; just go across it and everything will be solved, right?

Our unit is sealed after adding a casing

For example, underground pipes (for natural gas, etc.) must not pass through process units that are not related to them; oil fields are prone to such phenomena

Foreign practices for fire dikes: The highest quality approach involves using seal joints; a common method uses asbestos in the middle with fire-resistant mortar at both ends. There are also less common methods, but our clients have requested that the pipes be welded to gussets and embedded in the fire dike, with the ends connected by welded pipes or flanges. Regarding standards, refer to the standards. Section 3.1.3 of the \"GB 50351-2005 Code for Design of Fire Dikes in Tank Farm Areas\" stipulates as follows: \"All kinds of pipelines and cables entering and leaving the tank farm should preferably cross above the top of the fire dike or protective wall, or pass beneath the ground.\" When it is necessary to pass through fire dikes or protective walls, sleeves should be installed and effective sealing measures should be taken; alternatively, fixed short pipes with both ends sealed using hoses can be used. \"GB50160 Code for Fire Protection of Industrial Buildings\": Fire dikes can have pipes passed through them, but they must be sealed with non-combustible materials. Article 6.0.6, Clause 3 of GB 50074-2014: It is strictly prohibited to make holes in the fire dike. The areas where pipes pass through fire dikes should be tightly filled with non-combustible materials. At the points where rainwater drains pass through firewalls, measures should be taken to prevent oil from entering the drainage system.