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Metal bellows expansion joint
Introduction of metal bellows expansion joint
The research and development of the bellows expansion joint of our institute began in 1969. According to the needs of national defense equipment, we undertook the development of metal bellows for boats. We have successively developed DN550 bellows expansion joints, steam turbine inlet vibration damping flexible nozzles, high temperature and high pressure Metal bellows expansion joints, etc. At present, our firm can manufacture unreinforced U-shaped, reinforced U-shaped and Ω-shaped bellows. The material of the bellows is austenitic stainless steel, corrosion-resistant alloy, cupronickel, industrial passivated titanium, etc. The size of the round expansion joint is DN50-4800mm, and the rectangular expansion joint can be of any size.
Our products have been serialized and standardized, and 10 series of products have been formed including: YZM, CSRW, ZM, PC, MZ, YD, SN, CQ, CY, HR, etc.; at the same time, our firm can also provide special designs according to user requirements Expansion joint. Our institute can also provide technical consultation or technical services on pipeline compensation design, corrugated pipe material selection, expansion joint anti-corrosion, corrugated pipe damage analysis and life assessment, and corrugated pipe performance test according to user needs, and can undertake the development of special purpose expansion joints. task. The products are sold to all domestic provinces, cities, autonomous regions, Sudan, Iraq and other countries except Tibet, Taiwan and Macau.
Product Series
PC series for petrochemical industry
Expansion joint type: single axial type, double free type, single hinge type, single universal hinge type, double hinge type, double tie rod type, elbow pressure balance type.
Nominal diameter of expansion joint: 500-4800mm
Expansion joint design pressure: 0.35MPa
The highest design temperature of bellows: 350℃, 750℃
Bellows design fatigue life (cycles): 3000
Main application: Process pipeline of catalytic cracking oil refining unit with medium temperature below 1300℃.
Heat network engineering series
CSRW series
Expansion joint type: single axial type, external pressure single axial type, single hinge type, compound tie rod type.
Nominal diameter of expansion joint: 50-1600mm
Expansion joint design pressure: 0.25-4.0Mpa
Maximum design temperature of bellows: 350℃
Bellows design fatigue life (cycles): 1000, 500, 200
Main purpose: overhead laying of central heating pipe network in trenches with steam and hot water media below 450°C.
ZM series
Expansion joint type: single axial type, external pressure single axial type.
Nominal diameter of expansion joint: 50-1200mm
Expansion joint design pressure: 0.25-1.6MPa
Maximum design temperature of bellows: 350℃
Bellows design fatigue life (cycles): 1000, 200
Main purpose: The steam and hot water medium below 450℃ is directly buried to lay the central heating pipe network with compensation.
YZM series
Expansion joint type: external pressure duplex axial type.
Nominal diameter of expansion joint: 50-1400mm
Expansion joint design pressure: 1.6MPa
Maximum design temperature of bellows: 150℃
Bellows design fatigue life (cycles): 200, 1000
Main purpose: The hot water medium below 150℃ is directly buried to lay the central heating pipe network with compensation.
MZ series
Expansion joint type: single axial type.
Nominal diameter of expansion joint: 50-1200mm
Expansion joint design pressure: 1.6MPa
Maximum design temperature of bellows: 150℃
Bellows design fatigue life (cycles): one-time direct burial.
Main purpose: One-time compensation for hot water medium below 120℃ to directly bury the central heating pipe network.
CQ, CY series for ships
CQ series
Expansion joint type: single axial type.
Nominal diameter of expansion joint: round 65-800mm.
Expansion joint design pressure: 0.1MPa
Maximum design temperature of bellows: 550℃
Bellows design fatigue life (cycles): 5000.
Main purpose: exhaust pipe system of ship engine below 550℃.
CY series
Expansion joint type: round axial type.
Nominal diameter of expansion joint: 50-500mm.
Expansion joint design pressure: 0.6-1.6MPa
Maximum design temperature of bellows: 200℃
Bellows design fatigue life (cycles): 3000.
Main use: Marine sea water, fresh water, oil or steam piping system below 200 ℃.
HR series for heat exchanger
Expansion joint type: single axial type.
Nominal diameter of expansion joint: 150-4200mm.
Expansion joint design pressure: -0.1-10.0MPa
Bellows design temperature: 350℃
Bellows design fatigue life (cycles): 3000
Main application: pressure vessels such as heat exchangers with medium temperature below 350°C. Customized according to user requirements.
SN series for cement industry
Expansion joint type: round single axial type, rectangular single axial type.
Nominal diameter of expansion joint: round 200-3200mm, rectangular pipe cross-sectional area ≤9M2
Expansion joint design pressure: 0.05MPa
Maximum design temperature of bellows: 400℃
Bellows design fatigue life (cycles): 1000, 3000.
Main application: Process pipeline of cement plant with medium temperature below 1000℃ for micro-pressure dust gas and liquid medium.
YD series for metallurgical power engineering
Expansion joint type: single axial type, single hinge type, straight pipe pressure balance type, double tie rod type, elbow pressure balance type.
Nominal diameter of expansion joint: 200-3000mm
Expansion joint design pressure: 0.1-2.5MPa
Maximum design temperature of bellows: 350℃
Bellows design fatigue life (cycles): 1000
Main use: The medium temperature is below 350℃ and below 1300℃, gas and liquid medium metallurgical plants, power plant process pipelines.
Industry status of metal bellows expansion joint products
Our institute has now established a complete R&D, production, test and test capability, which is second to none in China. It has completed more than 20 research and development projects and published nearly 50 papers. The scientific research results of bellows expansion joints of our institute won the National Science Conference Award in 1978, and a number of achievements have won provincial and ministerial awards. Among the more than 200 expansion joint manufacturers in the country, our product research and development, design, manufacturing and application technology are in a leading position, and the product market share ranks among the forefront of the industry.
who I am:
Vice-chairman unit of China Petroleum and Petrochemical Equipment Industry Association Expansion Joint Branch
The Deputy Chairman Unit of the Expansion Joint Professional Committee of the Pressure Vessel Branch of the Chinese Mechanical Engineering Society
presided over the preparation
GB/T12777 "General Technical Requirements for Metal Bellows Expansion Joints"
Our metal bellows expansion joint products are recommended products for the electric power industry and the petrochemical and petroleum industry.
Production capacity of metal bellows expansion joint products
The production workshop covers an area of 12,000 square meters
More than 300 sets (sets) of production, testing and inspection equipment
can provide 1500 tons of bellows expansion joints per year
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