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Pressure Vessels

We provide high-quality pressure vessels worldwide, focusing on coke drums.

We handle a wide range of customer needs and employ a stringent quality assurance system using structural design and manufacturing technologies based on our vast experience and solid accomplishments. Additionally, we offer inspection, diagnosis, and welding repair services.


  1. 1. Highly durable coke drums.
  2. 2. Reactors using low-alloy steels and materials requiring intricate welding.
  3. 3. High-quality, ASME-certified pressure vessels.
  4. 4. Comprehensive support, including design, manufacturing, diagnosis, and repair.
  5. 5. Technological development and structure suggestions to enhance durability.
  6. 6. Residual life assessment by numerical analysis (damage prediction evaluation).


Dimensions: 9,800 ID × 38,300 L
Plate thickness: 38+3.5 mm
Material: SA387-11-2 + 410S clad

Dimensions: 3,970 ID × 31,920 L
Plate thickness: 140.0 mm
Materials: SA387-22-2 + TP347 overlay

Dimensions: 12,000 ID × 37,350 L
Plate thickness: 49.0 mm
Materials: KD63-M

Dimensions: 3,950 ID × 71,120 L
Plate thickness: 41.0 mm
Materials: SA387-22-1

Dimensions: 5,000 ID × 36,420 L
Plate thickness: 39.0 mm
Materials: SA240-TP340H

Dimensions: 4,370 ID × 32,720 L
Plate thickness: 19.0 mm
Materials: SA516-GR70/SA240-TP304H


Standard oil refining process

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Pressure vessel welding technology (1)

Build-up welding using wide welding materials

Pressure vessel welding technology (2)

Highly difficult build-up welding using special materials.

High-temperature TOFD flaw detection test: TOFD inspection while equipment is running using a high-temperature probe and contact medium.

Scanner for inspection while code drum is running: Automatic ultrasonic test system that can be used even while the equipment is operating.

Pressure vessel consultation

Telephone/Fax Inquiries

Tel: +81-3-6737-2680

Fax: +81-3-6866-5123

Web Inquiries

Inquiry Form