1,Description:
Torispherical heads are the most common type of head used for the manufacture of pressure vessels and usually the most economical to form.
The I. C. R is equal to the I. D of the head or less. We normally suggest allowing the I. C. R to be between 90% to 95% of the I. D of the head.The I. K. R needs to be between 6% and 10% of the I. C. R of the head

2, Application: 
Gas and Oil industry, Petrochemical industry, food, etc

3, forming range (see below excel)
Note that: 
A: The below heads was formed by hokkai with one piece plate, 
B: Pls check with me if the range is out of the below range, pls contact with me
C, the forming range is not included in petals fabrication way. 

4, Order information
Pls provide us with below information
1) Material grade. Including special requirement if have
2) Head Diameter
3) Nom THK or min thick
4) Straight Flange if have
5)others special forming process

Hokkai can provide various shapes of heads with ASME VIII-1 with U stamp, EN1345, AS1210 or China code etc. Hokkai also has qualification of most NDT methods.

Pls contact with me by the below E-mail adress if you have any further queries.

press range: 

Spinning 

Segment forming 

1.Hokkai Group


2,YIXING HOKKAI 
   * Established in Mar 1994 
   * Start to produce in Oct 1995
   * Became 100% Japanese owed in Aug 2000
   * Purpose: Based on the HIW accumulative head plates experience for kinds of industries, service to the development of chinese industry
   * Investor: Hokkai Iron Works 89.9%, Hokkai Limited 10.1%
   * Total investment: USD26.3million; registered captial: 12million
   
3, YIXING HOKKAI DISHED ENDS ORDER PROCESS
     

4, YIXING HOKKAI PRODUCTION PROCESS
    

5, YIXING HOKKAI QC SYSTEM