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Precision Tank Heads for Industrial Excellence

Olsen Technology is a trusted manufacturer of dished ends including Ellipsoidal, Torispherical, Spherical, Hemispherical, and Conical Heads. With over 20 years of expertise, 600+ global clients, and 20+ patents, we deliver unmatched quality and reliability.

About Olsen Technology

Olsen Technology is a company specializing in the production of tank heads. After twenty years of persistence and perseverance, we have accumulated rich practical experience and mastered core production processes.

We operate under the principle of "quality first, credit foremost, service satisfaction and continuous improvement". With more than 20 patents, a production capacity of over 5 million pieces annually, and sales networks spanning more than twenty countries and regions, we serve over 600 satisfied customers worldwide.

20+
Years of Experience
5M+
Annual Capacity
600+
Global Clients
20+
Countries Served
Factory Equipment Manufacturing Process Product Detail Team Work

Our Manufacturing Process

From raw material to finished product — precision at every step.

Plasma Cutting

High-precision cutting of raw metal sheets ensures accurate dimensions and clean edges for further processing.

Edge Trimming

Edges are precisely trimmed to prepare for forming and welding, ensuring seamless joint alignment.

Plasma Welding

Automated plasma welding ensures strong, consistent, and leak-proof seams on all dished ends.

Cold Forming

Cold press techniques (0–3200 mm) shape heads with high dimensional accuracy and surface integrity.

Our Products

High-quality dished ends engineered for durability, precision, and performance.

Semi Ellipsoidal Head

Semi Ellipsoidal Head

Also known as 2:1 elliptical heads, these are widely used in pressure vessels due to their optimal stress distribution and strength-to-weight ratio.

  • • Diameter: 100–3200 mm
  • • Material: Carbon Steel, Stainless Steel
  • • Standards: ASME, DIN, JIS
View Details
Torispherical Head

Torispherical Head

A cost-effective alternative to ellipsoidal heads, ideal for low to medium pressure applications with excellent forming characteristics.

  • • Crown radius: 1.0D, Knuckle radius: 0.1D
  • • Available in flanged & dished configurations
  • • Cold-formed for dimensional accuracy
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Spherical Head

Spherical Head

Perfectly hemispherical shape offering maximum strength under uniform pressure, commonly used in high-pressure storage tanks.

  • • Radius equal to half the diameter
  • • Ideal for cryogenic and high-pressure systems
  • • Seamless construction available
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Hemispherical Head

Hemispherical Head

Offers the highest pressure resistance among all head types, making it ideal for critical applications in petrochemical and aerospace industries.

  • • Internal depth = ½ diameter
  • • Lowest stress concentration
  • • Suitable for ultra-high pressure
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Conical Head

Conical Head

Used in vessels requiring easy discharge of contents. Available in various apex angles and can be flanged or welded.

  • • Apex angles: 30°, 45°, 60°, 90°
  • • Smooth internal transition
  • • Custom lengths and thicknesses
View Details
Flanged Only Head

Flanged Only Head

Designed for simple attachment to cylindrical shells, this head type provides a secure and leak-proof connection.

  • • Standard and custom flange types
  • • Compatible with ANSI, DIN, JIS
  • • Bolted or welded connections
View Details

Custom Dished Ends

We manufacture non-standard heads based on customer drawings and specifications, including special alloys and dimensions.

  • • Custom radii and thicknesses
  • • Exotic materials (Hastelloy, Inconel)
  • • Prototyping and small batches
Request Quote

Certified Pressure Vessel Heads

All products comply with international standards and come with full documentation including material certs and test reports.

  • • ASME U Stamp available
  • • EN 13445, PED compliant
  • • NDT and hydro testing
Learn More

Why Choose Olsen Technology?

Engineered for performance, precision, and long-term reliability.

Quality First

Strict quality control from raw material to final inspection ensures every head meets international standards.

Fast Production

Advanced cold-forming techniques enable rapid turnaround without compromising on dimensional accuracy.

Global Reach

Serving over 600 customers across 20+ countries with reliable logistics and after-sales support.

Innovation

Backed by 20+ patents and continuous R&D, we stay ahead in manufacturing technology and materials.

20+
Years in Business
5M+
Units Produced
600+
Satisfied Clients
20+
Countries Served

Frequently Asked Questions

What materials do you offer for tank heads?

We manufacture heads in carbon steel (Q245R, Q345R), stainless steel (304, 304L, 316, 316L), and special alloys including duplex and super duplex upon request.

What is the largest diameter you can produce?

Our cold-forming presses can handle diameters up to 3200 mm. For larger sizes, we offer segmented or hot-formed solutions.

Do you provide certification with your products?

Yes, all our tank heads come with material test certificates (MTC), and we can provide full ASME, PED, or other international compliance documentation.

Can you manufacture custom-shaped heads?

Absolutely. We accept custom drawings and specifications for non-standard heads, including unique radii, thicknesses, and flange types.

What is your typical lead time?

Standard products are delivered within 15–20 days. Custom orders may take 3–6 weeks depending on complexity and material availability.

Get in Touch

Reach out to us for quotes, technical support, or custom manufacturing needs.

+86 577 86906866
Facebook: Olsen Technology
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