What is non-standard dished heads?
Non-standard dished head fabricated by Dalian Dingjin refers to a curved end-closure for a tank or pressure vessel whose geometric ratios-such as crown radius, knuckle radius, or depth-do not match recognized code norms like ASME or DIN or GB25198. These custom pieces are built using specific dimensions to fit unique space limits or cost goals. Dingjin could manufacture standard and non-standard elliptical heads as per client's requirements.
Parameter as Per PO
|
Type |
Non-standard Elliptical Heads with Groove |
|
Manufacture Standard |
ASME |
|
Outside Diameter |
1425/965/762/609.6/558.8/508 |
|
Min Thk. A/F |
18/18/22/14/18/14 |
|
Cutting Method |
Plasma Cutting |
|
Forming Method |
Cold Forming |
|
Heat Treatment |
Not Required |
|
Material Designation |
SA516 Gr.70 |
|
Material Standard |
ASME SEC.II, PART A 2025 |
|
Surface Treatment |
Sand Blasting + Painting |
|
NDT Method |
Not Required |
Surface Protection After Forming in Dingjin
Dingjin provide below options to protect surface during transportation.
Option 1: Sand blasting +Painting
Dingjin adopts compressed air to force solid particles at high speeds against dished head surface. Its primary functions are to clean and smooth, removing scale for coming paint or coatings stick better.
Option 2: Wrapping plastic film
For cold forming carbon steel elliptical heads, clients could choose steel plates with plastic film to pack the dished heads to protect the surface during transportation.
Option 3: Wrapping felt blanket
For stainless steel dished heads, Dingjin advises to choose covering felt blanket with fixing plastic film after pickling.
Packing Types in Dingjin
Generally Dingjin adopts steel pallet to pack carbon steel dished heads and use plywood case to pack the stainless steel dished heads.
