Author Topic: Welded seam barrel liners  (Read 19072 times)

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Offline dan610324

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Re: Welded seam barrel liners
« Reply #30 on: May 26, 2008, 10:19:54 AM »
if they are as serious as they want to be they would reply your mail .

they seem to have set the standards for the us market when it comes to cannons , but when their rules been discussed it seems like not anyone can tell 100 % what they mean .

I got to contact them to have this question marks straighten out
Dan Pettersson
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interested in early bronze guns

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Offline GGaskill

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Re: Welded seam barrel liners
« Reply #31 on: May 26, 2008, 08:47:50 PM »
A reply has posted to my question on the N-SSA artillery forum.  See this post for the details.  The poster says sweat fitting means shrink fitting.  I will monitor the thread for a week or so to see if any one else posts in reply.
GG
“If you're not a liberal at 20, you have no heart; if you're not a conservative at 40, you have no brain.”
--Winston Churchill

Offline dan610324

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Re: Welded seam barrel liners
« Reply #32 on: May 27, 2008, 01:46:17 AM »
could anyone explain for me why I cant open links to the nssa forum , I only get an message that Ive been banned , and should contact moderator .

but I have never been at that forum , and cant find out how to contact anyone there either .
Dan Pettersson
a swedish cannon maniac
interested in early bronze guns

better safe than sorry

Offline Double D

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Re: Welded seam barrel liners
« Reply #33 on: May 27, 2008, 02:40:49 AM »
Dan, most liely a ban on non-US ISPs in an effort to stop spamming.  Drop me a pm with your email address and a screen print of the error message and will send the webmaster an eamil.

George, the responder seemed to think you were a bit out of touch...but I don't.

Glad you challenged it.

Offline guardsgunner

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Re: Welded seam barrel liners
« Reply #34 on: May 27, 2008, 01:11:46 PM »
George
   You ares right ,shrink fit is the proper machinery term. Sweating is for plumbers. Paul feels he must chime in on everything; whether he knows anything about it or not.

Offline Artilleryman

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Re: Welded seam barrel liners
« Reply #35 on: May 27, 2008, 02:26:31 PM »
I checked with the current National Artillery Officer and he said it referred to a shrink fit.  The wording should be clarified.  I will put forth a proposal to do so.  A previous post referred to inside and outside dimensions for barrels that would meet N-SSA requirements.  As I read it those dimensions should meet original specifications.  If it was rifled it has to be rifled, smoothbore has to be smoothbore.  The only exceptions are those guns that are grandfathered in, and they have to keep up with inspections or they will no longer be allowed to compete.   I have copied the rules concerning this below.

Actual or exact scale replicas of Civil War artillery pieces may be fired. The term “Civil War” applies to any artillery piece whose model antedates April 26, 1865. Replicas of artillery pieces must duplicate original pieces. All reproduction barrels must be made of iron, steel or bronze. All reproduction barrels and those original barrels failing inspection must be lined with a bore liner of extruded seamless steel tubing of a minimum ANSI standard and of a minimum 3/8-inch wall thickness.
Figure 10.1
The liner must be closed at the breech end with a steel plug, sweat-fitted into the liner and welded. The breech plug must have a radius of at least 25 percent of the bore radius and be at least 1 inch thick at its thinnest point. (See figure 10.1). All reproduction barrels manufactured after March 1, 1986 must have pictures of the liner and breech plug before and after welding. No reproduction barrel shall be approved after March 1, 1986, that does not have one caliber’s thickness of metal surrounding the bore at the breech. (See figure 10.2 for example.) Liner may be affixed by casting barrel around the liner or by other approved methods such as bonding with high strength adhesives. The method of locking the liner in the barrel shall be approved by the Artillery Ordnance Officer. The gun and its crew must pass the inspection specified in Section 18. A gun crew shall consist of a minimum of four members of the organization. Effective 1 February 1996, all artillery pieces must be originals or full-size, exact replicas to be approved.

a. Scale replicas currently having N-SSA approval, except those with tank-type rifling, may be sold or transferred to N-SSA members or organizations and continue to be used as long as they pass the inspection at the time of transfer. If a scale replica fails to pass inspection, or is not currently inspected, it shall be disqualified from further N-SSA competition.
b. A cannon with a reduced bore is considered a scale replica gun, and is, therefore, not allowed, unless already in N-SSA use as of February 1, 1996.
c. A reproduction of rifled cannon must be rifled, unless already in N-SSA use as of February 1, 1996.
Norm Gibson, 1st SC Vol., ACWSA

Offline Double D

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Re: Welded seam barrel liners
« Reply #36 on: May 27, 2008, 03:44:47 PM »
Thanks Norm for clearing that up.

Now if you clarify the rule about using a liner in the barrel  of a new made steel Barrel. 

Offline guardsgunner

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Re: Welded seam barrel liners
« Reply #37 on: May 27, 2008, 03:56:10 PM »
DD,
   Your right, the rule needs to be changed to read; All  CAST  reproduction barrels and those original barrels failing inspection .....................
   Norm and I have known about that one for awhile, we both have barrels machined from solid stock. Breechloaders at that.
Sometime rules can get in the way of common sense.

Bob

Offline Artilleryman

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Re: Welded seam barrel liners
« Reply #38 on: May 27, 2008, 04:04:34 PM »
I will submit the liner change also.
Norm Gibson, 1st SC Vol., ACWSA

Offline Double D

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Re: Welded seam barrel liners
« Reply #39 on: May 27, 2008, 04:47:28 PM »
Thanks guys...you get those two things cleared up and it will make my job so much easier.

Offline Max Caliber

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Re: Welded seam barrel liners
« Reply #40 on: May 29, 2008, 05:07:32 AM »
Here is a drawing I did to show a little better how a vent piece was installed in Civil War bronze field pieces. After the vent piece was screwed in tightly the excess was sawed off and the vent piece was dressed down to the top of the barrel. Note that the front of the vent piece is recessed .25 into the barrel. The threaded length varied with the different barrels.






Max

Offline dan610324

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Re: Welded seam barrel liners
« Reply #41 on: May 29, 2008, 11:39:45 AM »
still no reply from nssa either on my questions or why Im banned   :(
Dan Pettersson
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interested in early bronze guns

better safe than sorry

Offline Artilleryman

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Re: Welded seam barrel liners
« Reply #42 on: May 29, 2008, 01:57:33 PM »
Dan, who have you been trying to contact?  The following email address is for Linwood Mcmahon a board moderator.

ITManager@n-ssa.net   
Norm Gibson, 1st SC Vol., ACWSA

Offline dan610324

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Re: Welded seam barrel liners
« Reply #43 on: May 29, 2008, 02:10:04 PM »
why Im banned is sent to the webmaster ,
my questions is sent to charlie smithgall
Dan Pettersson
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Offline Double D

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Re: Welded seam barrel liners
« Reply #44 on: May 29, 2008, 02:37:09 PM »
Norm,

I have been waiting a week to get access to the the N-SSA board. 

I forwarded the information from Dan to the N-SSA webmaster and got no reply, I'll forward it to Linwood Mcmahon


Offline dan610324

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Re: Welded seam barrel liners
« Reply #45 on: May 29, 2008, 08:27:55 PM »
maybe they aint such an serious organization as they try to be ,
for me an national organization would try a little harder to help .
 
Dan Pettersson
a swedish cannon maniac
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better safe than sorry

Offline Double D

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Re: Welded seam barrel liners
« Reply #46 on: May 30, 2008, 02:07:56 AM »
Dan,

These guys are a very serious organization.  It probably is a situation of things like BBS are maintained by volunteers,  Let's just be patient and let Norm take care of it for us.

Offline Artilleryman

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Re: Welded seam barrel liners
« Reply #47 on: May 30, 2008, 04:44:43 AM »
Dan what questions do you want Smithgall to answer?
Norm Gibson, 1st SC Vol., ACWSA

Offline Frank46

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Re: Welded seam barrel liners
« Reply #48 on: May 30, 2008, 06:29:35 PM »
Just a thought. Worked in a tank farm for some years.Our oil lines were steam traced. Unfortunately some genius spec'd the steam lines as seamed. After a few years we started getting steam leaks on a very frequent basis. At least one per week maybe more. It became so bad that eventually all steam tracer lines had to be replaced. This time seamless schedule 40-60 pipe was used. And this was only with 100-150 psi steam pressure. regards,Frank

Offline dan610324

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Re: Welded seam barrel liners
« Reply #49 on: May 30, 2008, 07:10:09 PM »
it was just a few technical questions
Dan Pettersson
a swedish cannon maniac
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better safe than sorry

Offline HuecoDoc

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Re: Welded seam barrel liners
« Reply #50 on: May 30, 2008, 07:35:37 PM »
L Mcmahon is no longer a moderator, replaced by "webmistress" Cortney West, but oddly I can't find a link or email for her.

Dan, who have you been trying to contact?  The following email address is for Linwood Mcmahon a board moderator.

ITManager@n-ssa.net   

Offline Double D

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Re: Welded seam barrel liners
« Reply #51 on: October 28, 2009, 03:36:56 AM »
I have changed an incorrect term in my original post.  Change occlusion to inclusion.