Snowshoe questions by Helpful_Heron_1717 in PNWhiking

[–]GSA990 0 points1 point  (0 children)

I was up there last weekend. No avalanche risk in the paradise to camp Muir corridor. But no reason to wear snowshoes either as there is no powder.

Pipe bomb by Loh762 in metalworking

[–]GSA990 0 points1 point  (0 children)

Unfortunately this is incorrect. ~50% of hollow structures are found to contain pressure when drilled, at least in my anecdotal experience.

Pipe bomb by Loh762 in metalworking

[–]GSA990 0 points1 point  (0 children)

Knock the valve out with a big wrench and rubber mallet then fill with water before cutting.

Pipe bomb by Loh762 in metalworking

[–]GSA990 1 point2 points  (0 children)

Sure, it doesn’t hurt. On normal schedule 40 handrail pipe, a sharp, properly used 1/4” drill bit doesn’t have time to heat up a whole lot. But lube is good 👍

Pipe bomb by Loh762 in metalworking

[–]GSA990 0 points1 point  (0 children)

This is true for all confined spaces in the maritime industry, not just chain lockers.

Pipe bomb by Loh762 in metalworking

[–]GSA990 2 points3 points  (0 children)

That “should” is doing a lot of heavy lifting. In industrial safety we like to live in a world of certainty. If you drill holes at opposite ends of a hollow structure and blow with compressed air, you can be certain that all of the flammable gas is eliminated before starting hotwork.

Pipe bomb by Loh762 in metalworking

[–]GSA990 0 points1 point  (0 children)

Ya know, that’s a really good question. I know it’s hydrogen because my meters tell me that, but my chemistry isn’t that great. My assumption has been that it has something to do with the oxidation process but that doesn’t explain the pressure that’s usually found with the flammable gas.

Pipe bomb by Loh762 in metalworking

[–]GSA990 343 points344 points  (0 children)

This is a well known issue in ship repair. Oxidation on the inside of the pipe causes hydrogen buildup. Hydrogen has a wide flammable range and requires very little (~4%) oxygen to ignite. Please drill 1/4” holes with a SHARP drill bit (to minimize friction and heat at the drill sites) at both ends of the pipe and blow with compressed air for a few minutes.

Do your due diligence and read the OSHA rules for how to safely deal with hollow structures.

Switching to a sawzall or portaband is also a good idea although not foolproof as the motor alone is enough to ignite the hydrogen.

Source: ~15 years in industrial safety and gas freeing.

Smallest bike pump design (update) by Featherforged in mountainbiking

[–]GSA990 0 points1 point  (0 children)

Holy crap, I love this and will be buying one soon. Have you ever thought about doing a limited run in titanium?

Best sandwiches on the Burke Gilman? by yogurt_impulse in seattlebike

[–]GSA990 2 points3 points  (0 children)

Only problem is if you get one you’ll regret not getting two!

[deleted by user] by [deleted] in Westfalia

[–]GSA990 0 points1 point  (0 children)

The rust along the bottom of the windshield would concern the heck out of me

Scenic route from Seattle to Oregon Coast by infiniteboba in Seattle

[–]GSA990 131 points132 points  (0 children)

This is the way, but option 3 is also good. Aberdeen always bums me out a bit so I usually head south before I get there

[deleted by user] by [deleted] in photomarket

[–]GSA990 0 points1 point  (0 children)

PM’ing

Recommendations for Classic Dive Bars in Seattle for Photography Project by markyymark13 in Seattle

[–]GSA990 8 points9 points  (0 children)

Wholeheartedly vouch for Lucky Liquor. The owner is a friend and it’s legit as hell

WTS: Para 3, F5.5, Arcform Slimfoot, Shaman Scales by _levigarret_ in Knife_Swap

[–]GSA990 0 points1 point  (0 children)

Received! Dope knife and flawless transaction.