For doing cold bend of 2D radius is acceptable by class and standard.
However we found the supplier was supplied casing pipes with certificate of ASTM A106 gr B.
Material composition are perfectly matching, but yield and tensil strength given in higher value.
ASTM A106GRADE B is mentioning...
Seamless pipes (ASTM A106 GR B) are getting crack while doing cold bend of 2D Radius..
What was the reason???.
Samples tested in lab .. found all chemical properties are meeting 106 grade B standard.
I have seen some Japanis,south Korea and US constructed Offshore Fast patrol vessels..
They are using inner galvanised pipes in diesel tanks ..
@MJCronin... Your opinion is not bad..
Once you got a time then try to understand client requirement instead of blaming client...
Refer ABS,LYODS,DNV...
Thank you for your reply...
This is not a new process... It's a common process in Shipbuilding...
Most of the Naval ships / commercial ships are following this method.
As per class, Plastic pipe routing is not acceptable.
I already told this is our client requirement..we can't change the rule...
Dear Experts,
One of my client requirement is given below,
5" Pipe spools internal surface to be Hot Dip Galvanized.
Purpose :- Sea water line passing throw diesel tank.
Kindly let me know is there any coating which i can apply outer surface of pipe to prevent zinc bonding.
T/R
Mani.P
Dear Experts,
Please confirm what is wrong in my Pressure reducing valve.
Pressure Reducing Valve Spec 8 Bar inlet 2.5 Bar outlet.
Inspection Result:-
Testing Pump : Hand Pump.
Case:1 - Inlet pressure given 10 Bar Outlet Received 2.7 Bar.
Case:2 - Inlet pressure given 8 Bar Outlet Received...
Dear Expert,
Kindly let us know the following questions answer,
1. For Cu Ni 90/10 pipe routed inside the water ballast tank, so what type of joint is suitable & acceptable as per class rule.
2. For Cu Ni 90/10 pipe flange and other material is NAB as per owner technical specification, let me...
