Subject: Re: Good Technical Books?
From: Ian Sutton
Date: Sun, 15 Dec 1996 14:20:03 -0600
Christian Campbell wrote:
>
> I am a buyer of technical books at Brown University. So, I thought I'd go
> to the people who read these books to find out which books are "must
> have's!" If you have any suggestions, please e-mail me. I am
> particularly interested in recent non-computer titles, but I also stock a
> number of technical classics.
>
> Thank you,
>
> --
> Christian Eric Campbell
> Buyer, Technical Books & Custom Publishing
> phone(401)863-2023 fax(401)863-2233
I publish chemical engineering books, with a focus on safety. The first
title is "Writing Operating Procedures For Process Plants." Soon to be
released are: "Process Safety Management", "Audit Protocols For Process
Safety" and "Checklists For Hazards Analysis."
I can be reached at:
Southwestern Books
2437 Bay Area Blvd, Ste 195
Houston, TX
77058
Phone: (281) 488-7767
Fax: (281) 488-2259
E-mail: swbooks@iwl.net
Regards,
Ian Sutton
Subject: Heating Inside of Extruded Tube.
From: "Jason Lenz"
Date: 15 Dec 96 23:49:23 GMT
I'm doing some thermal welding of an extruded tube, which for processing
reasons I need to heat from the inside. Normally this would not be a
problem, but the scale of the parts I'm working with has created
difficulties. Below is a summary of the application. I'm hoping some of
you might know of some equipment that can accomplish this, or
alternatively, how to build something that could accomplish this. Thanks
in advance!
PARAMETERS:
-Tubing insided diameter (ID) = 0.016"
-Tubing outside diameter (OD) = 0.022".
-Tubing Length = 12".
-Area to be heated is nominally 3" from one end.
-Length of heat zone needs to be approximately 0.08"
-Temperature needed is approximately 200 deg C
Here are two methods that my colleagues and I are working on.
DC RESISTANCE COIL:
One of the electrical engineers at my company has been able to make a small
coil, 0.12" in length, which fits inside a stainless steel hypotube. The
hypotube has an ID of 0.012", and an OD of 0.0158". We have been able to
slide this coil assembly inside the extruded tube, and apply a current to
obtain the required temperature.
DRAWBACKS:
It's a real pain in the *@(*#, to make the coils. In addition, they are
very fragile. We can't go into a production environment with something
that takes our electrical engineer half a day to produce, yet is easily
broken. If we could contract them out fairly cheaply, it might be viable.
INDUCTANCE HEATING:
We have access to an inductance machine, which can heat up a 0.0158" OD
stainless steel mandrel using a magnetic field.
DRAWBACKS:
The tubing with mandrel inside has to be fed through a fairly small
inductance coil. If the coil ID is increased, more power is required, and
the control on the length of the heat zone is lost. In addition, the
mandrel can be the only conductive part in the vicinity of the coil. We
are currently trying to make a minaturized non conductive version of our
fixturing for the OD of the tube. Could be pretty tricky.
Any other ideas??
Subject: Re: Qualification for P.E Exam
From: "Michael Lindeburg, PE"
Date: Sun, 15 Dec 1996 18:51:19 -0800
C P GOPALAKRISHNAN wrote:
>
> hai all:
>
> What is the qualification to take a P.E.Exam after one's EIT.?
>
> To be more specific, how many years of experience does one need? Does it
> have to be under a P.E.? Is it same in all states?
>
> Thank you for your help!
>
> gopal
Dear Gopal -
The requirements to take the PE exam vary from state to state,
although when all of the different application and procedural
issues are stripped away, the requirements are quite similar.
Almost all states require 4 years of experience. California is
an exception, requiring only 2 years. The experience supposedly
needs to be under the direction of (or verified by) other PEs.
This requirement is often impossible to meet for many engineers
(whose bosses are not PEs), and each state has developed ways to
mitigate that requirement.
If you post the state you are from, maybe someone from it can give
you specific advice. Of course, you should call your state board
for the last word. Good luck.
--
Michael Lindeburg, PE, Publisher
Professional Publications, Inc., http://www.ppi2pass.com
(415) 593-9119 ext. 23
"Your comments, suggestions, and (ugh!) criticisms are always welcome."
