By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by allandale

Vertical Boiler Fittings

All Topics | Latest Posts

Search for:  in Thread Title in  
gary.a.ayres11/07/2018 07:26:47
avatar
53 forum posts
15 photos

Thanks Jason.

Well, back at it, then. No other option!

Will probably grind back that overhang first, as per advice offered elsewhere.

Edited By gary.a.ayres on 11/07/2018 07:28:05

Neil Wyatt11/07/2018 17:38:43
avatar
Moderator
13843 forum posts
583 photos
68 articles

You will find that once red hot, adding a bit of fresh silver solder will help the existing lump to melt.

Neil

gary.a.ayres11/07/2018 19:35:41
avatar
53 forum posts
15 photos

Hi Neil -

Useful to know; thanks.

I'll grind it back first, then bear in mind what you say when I'm silver soldering.

gary

gary.a.ayres17/07/2018 23:17:40
avatar
53 forum posts
15 photos

Well, for reasons which I can't quite figure out I had a struggle with my torches but somehow managed to get the joint looking good.

I *think* the boiler may now be intact but am unable to test it as I sheared off the end of my pressure gauge adaptor when I was tightening it! I'll have to make another one but am going away for a couple of weeks on Saturday so it may have to wait until I get back.

Frustration...!

gary.a.ayres21/07/2018 14:44:52
avatar
53 forum posts
15 photos

At last!

Successful hydro test today! The boiler is now sorted.

Away for a couple of weeks then on to the next step, which I understand should be another hydraulic test at 1.5 WP with all fittings in situ.

Many thanks for your fantastic help so far - it is truly appreciated.

smiley

gary.a.ayres22/07/2018 00:11:49
avatar
53 forum posts
15 photos
gary.a.ayres22/07/2018 15:59:28
avatar
53 forum posts
15 photos

Following an initial cleanup with files, Scotch-Brite and steel wool:

gary

gary.a.ayres07/08/2018 23:23:08
avatar
53 forum posts
15 photos

Hi -

progress has been slow as I've been away and the hot weather has distracted me from the workshop.

However, I have just taken the black paint off all my fittings with acetone in favour of an all-brass look, and have made a start with Loctite threadlocker. My first experience with the stuff, but it does inspire confidence I have to say.

One slight issue faces me before I can go on to the second hydro test: way back when I was silver soldering in my bushes, I left brass blanking plugs (connected by a steel strip) in the two water gauge bushes in an attempt to keep them parallel. In my inexperience I didn't realise that the brass would be prone to melt, but the plug in the top bush did so. I had to drill it out and for reasons I can't now remember I ended up having to drill and tap it 5/16 instead of 1/4. I then made a threaded sleeve to reduce it back down to 1/4. This seemed ok, but tonight the sleeve sheared when I was trying it out. The upshot is that I'll have to make another one. I'm not overly worried about this as I'm pretty sure that with the Loctite it will be fine, but it's all more time of course...

Will keep chipping away and will post significant developments.

gary.a.ayres07/08/2018 23:24:23
avatar
53 forum posts
15 photos

BTW you guys have been very kind and I'd like to return the courtesy by reading some more of your threads about your own work. It doesn't seem too easy to search for threads by author (am I missing something?), so if any of you would like to post a link here to your own favourite threads or just name them so I can search for them I'd be very grateful.

Cheers,

gary

JasonB08/08/2018 06:56:23
avatar
Moderator
13068 forum posts
1188 photos

You may be better with a Loctite pipe joint sealer rather than a thread locker, if nothing else it will be easier to take fittings off at a later date rather than risk leaving part in the threaded bush.

gary.a.ayres08/08/2018 07:14:27
avatar
53 forum posts
15 photos

Thanks Jason.

It's Loctite 2400 'threadlocker' that I'm using. On the packet it says 'designed for the locking of threaded components which require disassembly with standard hand tools'.

Do you feel that a pipe joint sealer would still be better?

gary

Doubletop08/08/2018 11:38:58
avatar
365 forum posts
4 photos

Gary

Loctite 5770 is what you need

**LINK**

 

Pete

Edited By Doubletop on 08/08/2018 11:39:22

gary.a.ayres08/08/2018 12:07:39
avatar
53 forum posts
15 photos

Thanks Pete - will look into this.

gary

gary.a.ayres08/08/2018 23:29:17
avatar
53 forum posts
15 photos

Hi again Jason and Pete -

Loctite 5770 appears to be pretty much unavailable in the UK as far as I can see.

However, Loctite 577 does seem to be available. Here it is:

https://www.amazon.co.uk/Loctite-Thread-Sealant-Strength-Genuine/dp/B00XLPMOPK

It looks the same to me - maybe they just knocked the 0 off the end of the number...

Do you think this is the one?

Don't want to harrass you with silly or obvious questions but I'd rather make sure that I'm on the right track at this point than muck things up later.

Thanks,

gary

Edited By gary.a.ayres on 08/08/2018 23:29:58

Edited By gary.a.ayres on 08/08/2018 23:31:31

Doubletop09/08/2018 02:30:38
avatar
365 forum posts
4 photos

Gary

Loctite 577 is nothing at all like 5770 I'm afraid. Just check the spec sheets. If Amazon UK doesn't have it Amazon.com does.

These days you should always look for alternative offshore suppliers regardless of where they are in the world. You'd be surprised what difference there is on pricing regardless of any shipping and duty that may be incurred. I'm in NZ but buy my stuff from UK, Aus, China and the US. Unfortunately for NZ suppliers they are generally at the end of the list when it comes to value added goods.

Pete

gary.a.ayres09/08/2018 06:59:17
avatar
53 forum posts
15 photos

Pete -

great advice on sourcing materials. I need to go wider!

Meanwhile, I noticed that in another thread you recommend Loctite 592 and in the same thread someone else suggests 574.

How do you feel these compare with 5770?

Am happy to order 5770 from the USA but before doing so would value your opinion on this.

Many thanks,

gary

Doubletop09/08/2018 11:32:26
avatar
365 forum posts
4 photos

Grant

I could not be considered a loctite expert, by any stretch. The numbering system appears chaotic so assuming anything with a similar number will be a similar product will be incorrect. As you have also found some products appear to be available in some locations but not in others. Some products referenced by you guys in the UK aren't available in here NZ. At one point I was of the opinion that the same product had different numbers in different locations.

You are looking for a product to seal a fitting into a bush in your boiler so a pipe thread sealant would seem appropriate. 567 is/was generally used but it is low strength and 592 looks like it is a replacment for 567. However, I stumbled across 5770 recently and it is medium strength and fittings stay where you put them without the need for a back nut. Its high temp and high pressure. The tube I have says “for use with steam” (or something similar, my tube is on loan) so it would seem the most appropriate.

Again, I suggest reading the spec sheets. They are all in a similar style so comparisons can be made although detailed analysis can turn out to be a bit confusing.

Pete

gary.a.ayres09/08/2018 12:09:40
avatar
53 forum posts
15 photos

Pete -

very grateful to you for taking the time to help me with this - it's much appreciated and very helpful.

Glad it's not just me who finds the Loctite numbering system 'challenging'!

From what you have said I'll most likely order a tube of 5770 from the USA.

Many thanks,

gary

SillyOldDuffer09/08/2018 12:35:24
3120 forum posts
626 photos

Or an alternative that is available in the UK? This stuff may be a possibility.

gary.a.ayres09/08/2018 22:30:01
avatar
53 forum posts
15 photos

Thank you Sir!

Worth considering.

I'm also quite tempted by this, which I noticed was recommended on another forum...

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
Expo Tools July 14
Ausee.com.au
Eccentric Engineering
Eccentric July 5 2018
emcomachinetools
ChesterUK
Sarik
Shapiro
SPG Tools October Seventeen
Warco
TRANSWAVE Converters
Allendale Electronics
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

Visit the Model Engineer
Exhibition website

Model Engineer Exhibition