A Guide to Understanding Different Tank Head Designs

A Guide to Understanding Different Tank Head Designs

Tank heads, also known as dished ends, are essential structural components in the fabrication of pressure vessels. They provide the end closures for these containers, ensuring their integrity and safe operation. As a leading supplier headquartered in China, Haipei has dedicated over 25 years to providing clients worldwide with superior-quality tank heads. Our extensive product range encompasses a variety of configurations, including:

• Semi-Elliptical Heads

• Torispherical Heads

• Hemispherical Heads (in both Crown & Petal designs)

• Standard Dished Heads

• Flat Heads

• Ellipsoidal Heads

The diverse applications of pressure vessels across numerous industries necessitate a wide variety of tank head types and sizes. These heads are produced using different manufacturing processes, such as deep drawing, cold and hot forming, spinning, and specialized dishing and flanging techniques. Larger hemispherical heads are sometimes fabricated by joining segments in crown and petal arrangements.

Technical Specifications:

• Size: Manufactured according to customer drawings.

• Standards: Compliant with ASME code section VIII Div. 1, paragraphs "UG-79" and "UG-81".

• Forming Capabilities:

• Thickness range: 5mm to 200mm, using both cold and hot forming methods.

• Diameter range: 200mm to 10000mm, including heads constructed from multiple segments.

• Material Sourcing: Materials sourced from reputable mills including Posco & Dongkuk, as well as suppliers in Europe and Japan.

• Additional Services: We offer comprehensive services including Non-Destructive Testing (NDT), Heat Treatment, U-Stamp Partial Data Reports, and Third-Party Inspection.

Available Materials:

• Carbon Steel: SA/A516 GR 60/65/70N, SA/A 283, 285, SA/A 36, S275JR, SS400, SA/A 537 CL ½

• Chrome Moly Steel: SA/A 387 GR 5, 11, 12, 22

• Stainless Steel: SA/A240GR304/304L, 316/316L, 317/317L, 321/321H, 347/347H, 310S

• Duplex/ Super Duplex Stainless Steel: SA/A 240 UNS S 31803, S32205, S32750, S32760, S31254

• Nickel Alloys: UNS2200 (Nickel 200), UNS2201 (Nickel 201), UNS4400 (Monel 400), UNS5500 (Monel K500), UNS6600 (Inconel 600), UNS6601 (Inconel 601), UNS6625 (Inconel 625), UNS8825 (Inconel 825), UNS 6022 (Hastelloy C-22), UNS10276 (Hastelloy C-276)

Special Considerations:

• Hydrogen-Induced Cracking (HIC) resistant options available.

• Compliant with PED 2014/68/EU.

• NACE MR0175 compliant materials available for sour service applications.

• Weld overlay services are offered.