<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div>Hugh,</div><div>If I were building a low cost chamber of that size, I would take a type 1 CNG steel tank that is 12 in dia and cut one end off. I would cut the tank to required length and machine the end that is cut and machine the head end as well. Then I would machine a ring that both ends fit into with an o-ring. </div><div>I would make two rings that go over the heads but won't slide over. I would drill those rings for stay bolts to holt it together. No welding required.</div><div>Should be under 1,000 dollars to build. </div><div>Just a thought.</div><div>Hank</div><div><br></div>
</div><div id="yahoo_quoted_2019251257" class="yahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;">
<div>
On Tuesday, July 10, 2018, 4:02:33 PM MDT, Hugh Fulton via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id="yiv6984105990"><style>#yiv6984105990 #yiv6984105990 --
_filtered #yiv6984105990 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}
_filtered #yiv6984105990 {font-family:Tahoma;panose-1:2 11 6 4 3 5 4 4 2 4;}
#yiv6984105990
#yiv6984105990 p.yiv6984105990MsoNormal, #yiv6984105990 li.yiv6984105990MsoNormal, #yiv6984105990 div.yiv6984105990MsoNormal
{margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;font-family:New;}
#yiv6984105990 a:link, #yiv6984105990 span.yiv6984105990MsoHyperlink
{color:blue;text-decoration:underline;}
#yiv6984105990 a:visited, #yiv6984105990 span.yiv6984105990MsoHyperlinkFollowed
{color:purple;text-decoration:underline;}
#yiv6984105990 p.yiv6984105990MsoAcetate, #yiv6984105990 li.yiv6984105990MsoAcetate, #yiv6984105990 div.yiv6984105990MsoAcetate
{margin:0cm;margin-bottom:.0001pt;font-size:8.0pt;}
#yiv6984105990 span.yiv6984105990EmailStyle17
{color:#1F497D;}
#yiv6984105990 span.yiv6984105990BalloonTextChar
{}
#yiv6984105990 .yiv6984105990MsoChpDefault
{font-size:10.0pt;}
_filtered #yiv6984105990 {margin:72.0pt 72.0pt 72.0pt 72.0pt;}
#yiv6984105990 div.yiv6984105990WordSection1
{}
#yiv6984105990 </style><div><div class="yiv6984105990WordSection1"><p class="yiv6984105990MsoNormal"><span style="font-size:11.0pt;"> </span></p><div><div id="yiv6984105990yui_3_16_0_ym19_1_1531186395801_78581"><p class="yiv6984105990MsoNormal" style="background:white;"><span style="color:#1F497D;">Hi All, Need some input. Pressure test rigs.</span></p><p class="yiv6984105990MsoNormal" style="background:white;"><span style="font-size:11.0pt;">Looking for ideas for a 1000 meter depth test vessel for ROV’s.</span></p><p class="yiv6984105990MsoNormal" style="background:white;"><span style="font-size:11.0pt;">I have done a basic design using 12” Sched 120 but by the time it is design approved etc it is getting up to USD $5,000 plus.</span></p><p class="yiv6984105990MsoNormal" style="background:white;"><span style="font-size:11.0pt;">Initial design was for a quick release 8 lug twist lock. As I looked at using Flanges and bolts but the weight gets a bit horiffic with the flange studs and nuts coming to over $600 without the cost of the flanges.</span></p><p class="yiv6984105990MsoNormal" style="background:white;"><span style="font-size:11.0pt;">A 24 inch test vessel would be better but 12 inch would suffice for now. The concept drawing is as below. Cheers, Hugh</span></p><div class="yiv6984105990yqt2824210411" id="yiv6984105990yqtfd82799"></div><div class="yiv6984105990yqt2824210411" id="yiv6984105990yqtfd64531"><p class="yiv6984105990MsoNormal" style="background:white;"><span style="font-size:11.0pt;"> </span></p><p class="yiv6984105990MsoNormal" style="background:white;"><img id="yiv6984105990Picture_x0020_1" width="168" height="218" src="cid:uxr6CpmKvklDOoD1SIGf"><span style="font-size:11.0pt;"></span></p></div></div></div></div></div></div><div class="yqt2824210411" id="yqtfd14721">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div></div>
</div>
</div></div></body></html>