By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale May 23

Copper boiler testing

All Topics | Latest Posts

Search for:  in Thread Title in  
Dorset Phil16/02/2019 20:25:25
5 forum posts

Hi, I'm about to start building a copper boiler for a 2" traction engine.

I've spoken to the local boiler inspector who said to make sure I get certificates of conformity. Which shouldn't be an issue. Is it normal to ask for these? Also how in-depth would it need to be as in for every single piece or would it on a per order basis? (Hopefully you catch my drift)

Lastly would it all need to be c106 grade?

Thanks for you help in advance

John Rudd16/02/2019 20:48:21
1364 forum posts
58 photos

Has your inspector seen sight of the plans for your boiler?

Might give him an insight to what he is expected to certify

Certificates of conformity of what?

You could ask your supplier for certificates for the copper materials....

Ask your boiler inspector what grade of copper is acceptable for the boiler to be fabricated from ( if not shown in the plans) and how expects it to be assembled....silver solder/tig weld/spit/ chewing gum

fizzy16/02/2019 20:51:43
1564 forum posts
104 photos

Certs for copper are not normally required at club testing level and you might find it difficult to get them for cut lengths. If you buy your materials from a good UK vendor then your receipt of purchase should stand to verify chain of custody. It doesnt say you have to have them in the rule book, only 'where apropriate'. You need themfor steel but ive never heard of anyone insisting on them for copper. The grade is debatable unless you intend totig weld it! Good luck.

Dorset Phil16/02/2019 20:54:12
5 forum posts

Hi yes he did look at the drawing. He is quite happy with the drawings.


The certificates of conformity are for the material. He said any good supplier can produce them for me. From that I can only assume that he wants them for every bit of material that goes into the boiler 

Edited By Dorset Phil on 16/02/2019 20:54:53

fizzy16/02/2019 21:27:50
1564 forum posts
104 photos

Has your boiler inspector ever actually built a boiler.....and in doing so tried to get paperwork? Me thinks not. Put it to the test and ask him who he used when he obtained his certs so that you can do the same. Im not saying you cant get them but I am saying that for a published design using silver solder they are not required in the UK for home built items. At the end of the day its his decision and it cant be overruled.

Dorset Phil16/02/2019 21:33:51
5 forum posts

Yes I do suspect that your correct there I don't mind jumping through hoops to an extent but having to get all the CoC' s sounds over the top to me.

He did give me a phone number to ring of a company who will but I won't find out until I call them on Monday.

duncan webster16/02/2019 22:29:08
2019 forum posts
30 photos

Ask your man where it says in the SFED/NFED testing procedure that Certs of Conformity are needed. I think he will struggle. C106 is the normal material for copper tube. The only issue to me is for the bronze bushes, you need to know that you are using a grade of bronze that is suitable for silver soldering, definitely not brass. Most of our suppliers seem to supply PB102, SAE 660 or Colphos.

Despite being 7% lead SAE 660 is reckoned by this website sae660 and this one SAe660 again to be good for brazing, PB102 has hardly any lead and Colphos is 4% so both OK. PB102 is a pig to drill holes in.


Edited By duncan webster on 16/02/2019 22:35:35

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
Eccentric Engineering
Eccentric July 5 2018
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