Bulk Purchasing and Buying Power

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mm5aho
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Re: Bulk Purchasing and Buying Power

Postby mm5aho » Fri Dec 04, 2015 11:42 am

[photobucket]Image[/photobucket]

The chains have been rattling in - 9 chains here and three anchors, and some more in transit.
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Re: Bulk Purchasing and Buying Power

Postby Nick » Fri Dec 04, 2015 11:50 am

Mavanier wrote:Thanks Geoff, but actually when I dug out the Avon bracket I realised it's held together by the paint, so is beyond help without welding. A job for another time, then.


I have a similar one. It is irretrievably fecked.

If you come across a cheap source of new brackets let me know.

Cheapest I can find is £100, which is what I paid for the dinghy 12 years ago !
- Nick 8)

Image

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mm5aho
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Re: Bulk Purchasing and Buying Power

Postby mm5aho » Fri Dec 04, 2015 12:14 pm

Mine's plastic. As old as the dinghy!
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Re: Bulk Purchasing and Buying Power

Postby SteveN » Fri Dec 04, 2015 2:45 pm

mm5aho wrote:The chains have been rattling in - 9 chains here and three anchors, and some more in transit.


2 more added late this morning.
Nick's is marked, sensibly, with full name and boat name.
My minimalist label just says 'Nutley'.
Your guys were very busy so the chains didn't get any additonal labels.

What an impressive place you run there.

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Re: Bulk Purchasing and Buying Power

Postby Mavanier » Mon Dec 07, 2015 11:01 am

That's my chain and eight steel brackets dropped off in Elgin this morning

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Re: Bulk Purchasing and Buying Power

Postby ash » Mon Dec 07, 2015 3:12 pm

Another 2 chains and 2 anchors added to the Cumbernauld pile. Met the main man too! Thanks Geoff for your help with this.

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Re: Bulk Purchasing and Buying Power

Postby mm5aho » Mon Dec 07, 2015 5:18 pm

A good collection there now, and I saw what might have been Santa dropping off another anchor this evening.
When the Elgin stuff arrives, We'll make a start on processing. Paint removal first, then stripping old galv off, then galvanizing.
Will advise progress.

Geoff
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Re: Bulk Purchasing and Buying Power

Postby Silkie » Mon Dec 07, 2015 8:22 pm

Wait for me! I should be able to manage through to Cumbernauld late Wednesday afternoon if that's not too late.
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Re: Bulk Purchasing and Buying Power

Postby mm5aho » Mon Dec 07, 2015 8:35 pm

Silkie wrote:Wait for me! I should be able to manage through to Cumbernauld late Wednesday afternoon if that's not too late.


No panic.
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Re: Bulk Purchasing and Buying Power

Postby BlowingOldBoots » Wed Dec 09, 2015 12:44 am

Hi Geoff,

I have 60m of 10mm chain, galvanised with some orange paint towards the bitter end and rust. I would like to drop it off at Cumbernauld if not too late. I depart for work on the 28th and wont be back until the 30 January again, so can only collect after that date.

Can I drop the chain at Cumbernauld?

One question, I don't think my chain is high tensile but if it was would the galvanising reduce the strength of the chain?

I will be coming up from Kip so if there are any in Kip who need a collection and drop off at the galvanisers, let me know, assuming I have not run out of time.

Thanks,

Alastair
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Re: Bulk Purchasing and Buying Power

Postby mm5aho » Wed Dec 09, 2015 8:58 am

Alastair.
No problem to drop in another chain to add to the collection.
When they're all here I'll post a list of what we've got to be sure nothing gone astray. There's still one or two en-route from Elgin. (They way to take cost out of galvanizing is to do as much as possible and put no time constraints on it. Its an unpredictable business, so having work to do "at our leisure" is a bonus, most want it yesterday, and they pay for that difficult scheduling job.)

Re High tensile chain.
There are various grades of chain, the most common for anchors are G30, G40, BBB and G43. G43 is stamped on the links, not often every one, but every 2-300mm or so. BBB is sometimes stamped on every link depending on supplier. All these suffer no effect from galvanizing.

Rarely, some use G70. This is heat treated G43, and it looses some of the advantage of the heat treatment, about 10% of its strength.

There are higher grades, G80, G100, G120. G80 and G100 are stamped with numbers (8, 80 or similar) to show that. These should not be galvanized. Its most unlikely that an anchor chair is of this material unless it was secondhand from a trucker (unlikely long enough) or a chain hoist or similar.

In the case of G70, its the heat treatment that is affected, by the galvanizing being at 450C.
In the case of the high grades its a different mechanism, the pretreatment (cleaning) of the steel is done in dilute acid (HCl), and extended time in acid can cause hydrogen embrittlement in those higher grades of steel. These grades don't just loose a little strength, they can catastrophically loose a lot. They don't come galvanized.

If your anchor chain is galvanized, then it can be re-galvanized.

I recently did some research on re-galvanizing road crash barrier, and extensive tensile testing of it afterward shows that it actually gets a little stronger, but by such a small amount, that its not significant.
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Re: Bulk Purchasing and Buying Power

Postby Booby Trapper » Wed Dec 09, 2015 6:31 pm

Geoff, I'd like to get mine done but not sure when I can get it to you. I'll try for this weekend if that's not too late. can It be dropped at Cumbernauld at weekends? If I don't make it or if that is too late just go ahead. I don't want you to wait for me.

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Re: Bulk Purchasing and Buying Power

Postby NorthUp2 » Wed Dec 09, 2015 7:19 pm

mm5aho wrote:Alastair.
No problem to drop in another chain to add to the collection.
When they're all here I'll post a list of what we've got to be sure nothing gone astray. There's still one or two en-route from Elgin......

There may be a flaw in that plan......I had a phone call from the Elgin plant yesterday, to say my chain was ready for collection, having been galvanised... !

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Re: Bulk Purchasing and Buying Power

Postby mm5aho » Thu Dec 10, 2015 9:02 am

Tony,

Not everything works as designed!

I'll investigate and let you know. I'm going there tomorrow anyway, so can have a look and make sure its done right!
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Re: Bulk Purchasing and Buying Power

Postby Booby Trapper » Thu Dec 10, 2015 9:08 pm

Geoff. I'm hoping to get mine off the boat and up to you tomorrow afternoon. is that OK?
Can I ask what might be a stupid question? I saw you mentioned about removing shackles if you want to get them undone again, How does regalvanising get done and not stick all the links together?


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