Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

Welding HDPE





September 1, 2010

Hello I am Dhiraj from India

Actually we are the manufactures of PP storage tank. & we are manufacturing storage tank of HDPE (2200 dia. & 3000 mm height). While doing it we are facing one problem, that we are finished with the shell manufacturing without failure, but for nozzle fitting at the bottom side of tank, welding is not being getting stuck with shell surface; it's leaking heavily as the time goes on. for nozzle we are using HDPE pipe.so what will be the main reason behind this? is there any problem regarding properties of HDPE sheets/HDPE pipe/HDPE welding rod we are using?

Please I do need urgent suggestions.

Dheeraj Vairale
Quality Department - Pune, Maharashtra, India



September 3, 2010

Sir:
In the industry that work with poly tanks are common. Some of these tanks are welded using heat and poly rod. Upon expansion/contraction due to temperature changes these welds crack. To avoid this, a special internally heated very thin "knife" is used such that this hot knife is slid through the two sides to be welded leaving a fully fused joint. These fused joints, done properly, do not seem to crack.
Regards,

Dr. Thomas H. Cook
Galvanizing Consultant - Hot Springs, South Dakota, USA


none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA