Engineering Stack Exchange
Engineering Stack Exchange

Questions tagged [waterproofing]

40 questions
7
votes
4 answers

How did this building's windows get like this?

I don't recall seeing the walls like this before, so I don't think it's just accumulated soilage. If it's wetness, what design flaw causes the windows to do that? Today was very hot and muggy so it's likely the AC was running all day.
Luke Sawczak
  • 181
  • 1
  • 5
7
votes
4 answers

What are the common failure points of waterproof cases?

I am making a waterproof case for my Galaxy S5 and/or my Raspberry Pi. I plan to make the main body from (or at least decorate it with) wood, though I can use other, stronger materials where needed. I am thinking of using some controller (as opposed…
Keychain1
  • 171
  • 3
6
votes
2 answers

Can I seal the inside of a water well to use it as water reservoir when the well is dry?

We've had unusually dry weather and our well has run so low that we had to call in a water hauling company to refill it a few days ago. The water man told me that even though he dumped in ~ 1000 gallons, a great part of it will seep out of the well…
cannotcompute
  • 201
  • 1
  • 5
4
votes
1 answer

Waterproof Case Time Limits

Some cell phone cases have a waterproof rating of IP-68, often specifying that they can tolerate immersion to 6 feet for 30 minutes or 3 feet for 60 minutes. My understanding, however, is that a good seal (like an o-ring) would fail near a certain…
bobuhito
  • 201
  • 1
  • 5
4
votes
2 answers

Thermoplastics that are permeable to water - high diffusion coefficient

I want to know if there are some fairly common thermoplastics that allow water to pass through (by diffusion) at a relatively high rate (on the order of days). For example, PET water bottles leak water by diffusion but it's extremely slow - it will…
Nic
  • 291
  • 1
  • 5
3
votes
2 answers

How do I connect a 3mm water tube to a plastic box?

I need to connect a 3mm inside-diameter tube from a solenoid valve to a plastic box. The box wall thickness is 4.5mm. The purpose is to empty water in the box when needed. How should I connect it so that it is water-tight (very low pressure - around…
keble
  • 41
  • 3
3
votes
2 answers

Why does epoxy resin become opaque after long exposure to water and LED lamps?

I want to put LED lamps in water. Up until now I used epoxy glass for its isolation, but after one year it starts to become opaque and lose its clearness. What causes the epoxy glass to cloud and become opaque? How can I avoid this problem while…
Soheil Paper
  • 1
  • 1
  • 9
3
votes
0 answers

water leak through subterranean cable penetrations in concrete

See the image below for the detail of 4 no. cable ducts that run from a trench in a raft foundation (on the left) through an approximately 1 m square penetration in the raft foundation, through soil (if it had been backfilled) and through an approx…
egg
  • 857
  • 6
  • 14
3
votes
1 answer

How are water-tight transmissions made, like the kind you see on inboard boats, pumps or food blenders?

I want to replicate the kind of interface you see on inboard boats, pumps, or food blenders. Basically, I want put a motor in a sealed vessel, and have it turn a prop outside the vessel, in water. Is this usually done just with a layer of grease…
Alex
  • 33
  • 3
3
votes
1 answer

How wasn't Thames Tunnel flooded during construction?

I have read the Brunel's shield directly exposed ground which was then excavated by the workers. But the construction was done just a few meters under the seabed. How wasn't the tunnel flooded immediately? I think of small pits that children dig on…
olegst
  • 131
  • 2
2
votes
2 answers

Do PVC concrete joint water stops degrade over time? Or were they never installed correctly?

A UK subterranean reinforced concrete structure built in the late 1960s has experienced sustained water ingress over time as shown by the deposition of minerals of the walls: According to the original drawings the construction joints were detailed…
egg
  • 857
  • 6
  • 14
2
votes
1 answer

Calculate thickness of a 1 square meter window made of acrylic in a submarine to endure 100meters

This question would have two parts: 1 - How to calculate thickness of a 1 square meter window made of acrylic in a submarine to endure 100meters of deepness in salt water? I don't remember the procedure to calculate this, even If I have done it in…
pfernandez
  • 21
  • 1
2
votes
0 answers

Is there any software for testing cad model waterproofing and isolation?

I have a cad model of a plastic box that is made of two parts. Two parts are connected with resin isolation. I want to test if my part is at least in theory ip86 water-resistant. So is there any software for testing cad model waterproofing and…
Blender
  • 129
  • 1
2
votes
1 answer

Waterproof Pan control/bearing/mechanism

Please bear with me - I'm not an engineer, I'm a software developer so lack the language / knowledge to describe what I want precisely. I'm controlling a servo to rotate /pan a platform to hold a camera (think pan/tilt). This is fine. However, I'd…
Jack
  • 121
  • 2
2
votes
3 answers

What type of stainless steels can resist 6 months under the sea?

Resist means without catastrophic corrosion here. We assume that there is no coating or anodic protection. The steel can be mirror polished and passivated. To make it more difficult, the shape is not a perfect sphere but a mechanism with some very…
Xiiryo
  • 161
  • 4
1
2 3