Inconel 625 Bellows Expansion Joint Products Description
Inconel 625 bellows expansion joints are flexible compensation elements designed for extreme working conditions, using ultra-heat-resistant and corrosion-resistant alloys as their core material. With the excellent performance of the material itself and the deformation compensation capability of the bellows structure, they are widely used in harsh industrial environments such as high temperature, corrosion, and high pressure. They can effectively absorb the stress generated by thermal expansion and contraction and vibration displacement in pipeline systems, ensuring the safe and stable operation of pipelines.
The specifications and models of Inconel 625 bellows expansion joints need to be defined from four core dimensions: dimensional parameters, pressure and temperature ratings, structural type, and performance indicators.
I. Core Dimensions and Specifications (Classified by Nominal Diameter/Outer Diameter) Dimensions are the basic identifiers for specifications and models, and key parameters such as nominal diameter (DN), inner and outer diameters, and length must be clearly specified.
| Classification Dimensions | Specifications range | Typical model corresponding parameters |
| Nominal diameter (DN) | DN10 (0.4 inches) - DN7000 (275.6 inches), while standard industrial applications are concentrated in DN40 (1.6 inches) - DN3000 (118.1 inches). | DN65 (2.56 inches): Suitable for low-pressure, high-temperature applications, outer diameter approximately 89mm, corresponding model "DN65 High Compression Rate Welded Bellows" DN900 (35.4 inches): For large-scale oil refining equipment, axial length 6150mm, external dimensions approximately 8m, weight 3225kg |
| Outer diameter (OD) | 0.358 inches (9.09mm) - 22.205 inches (564mm), larger sizes available upon request. | A 4-inch nominal size corresponds to an OD of approximately 5.36 inches (136.1mm), while an 8-inch nominal size corresponds to an OD of approximately 9.09-9.28 inches (231-236mm). For example, the Penflex 625-128 model has an OD of 9.19 inches. |
| length | Effective length (corrugated pipe): from 5.5 inches (139.7 mm); Total length (including flange): 12 inches (304.8 mm) - 6150 mm (6.15 m) | Small: Overall length 12 inches (304.8 mm), effective length 5.5 inches (139.7 mm) Large: Axial overall length 6150 mm (6.15 m), external dimensions 8 m (lateral expansion joint for oil refining equipment) |
| Thickness | Corrugated pipe wall thickness starts at 0.004 inches (0.102 mm) and increases in increments of 0.001 inches. | Standard industrial-grade hose thicknesses are 0.014-0.020 inches (0.356-0.508 mm), |
2.Pressure and Temperature Rating Specifications
Pressure and temperature are core indicators for classifying the applicable operating conditions of different models. The design pressure, test pressure, and maximum operating temperature must be clearly specified. Pressure ratings vary significantly between different structural types.
| Level Type | Specifications range | Typical Models / Scenarios |
| Design pressure | Low pressure: 250 Pa - 4.5 bar (450 kPa); Medium and high pressure: up to 12500 psig (86.2 MPa, burst pressure) | Low-pressure type: Design pressure 250Pa (gas transmission), 4.5bar (oil refining olefins equipment, test pressure 25bar) High-pressure type: 1-layer braided structure, static pressure 2116psig, burst pressure 8464psig |
| Maximum operating temperature | -250℃ (low temperature) - 1500℃ (high temperature), with typical high-temperature operating conditions concentrated between 550-800℃. | Medium-temperature type: Maximum 550℃ (for oil refining equipment, corrugated pipes) High-temperature type: Maximum 700℃, 800℃, 1500℃ (for boilers/exhaust systems) |
Inconel 625 Bellows Expansion Joint Factory Commitments
We understand that wholesalers need a stable and reliable supply, therefore we solemnly promise the following for every Inconel 625 bellows expansion joint order:
First, Quality Guarantee: If any Inconel 625 bellows expansion joint does not meet ASME B16.5/EJMA standards-whether due to insufficient temperature resistance, pressure issues, or leaks-we will replace it free of charge.
Second, Fast Delivery: We maintain a year-round stock of commonly used sizes (DN100/DN200/DN300) of Inconel 625 bellows expansion joints.
Third, Production Transparency: We have fully automated production lines equipped with CNC forming machines and advanced welding robots. We can provide capacity reports and factory audit videos upon request, allowing you to demonstrate our manufacturing capabilities to your customers.
Fourth, 24/7 Support: If you need assistance with technical specifications, order updates, or matching expansion joints to specific piping systems, they will respond within one hour. We even send you a 1:1 scale sample component free of charge – allowing your customers to test product quality and performance before bulk purchase.
Inconel 625 Bellows Expansion Joint Product Display
Application Areas
Leveraging its material and structural advantages, this product is widely used in industrial fields with extremely high requirements for "high temperature resistance, corrosion resistance, and high reliability":
1.Coal Chemical Industry: Used in high-temperature coal gas transmission pipelines and coal chemical tail gas treatment systems, it can withstand temperatures of 650-700℃ and corrosion from media such as HCN, NH₃, and tar, compensating for axial displacement of pipelines caused by temperature changes.
2.Oil and Gas & Marine Engineering: Suitable for pipeline systems on offshore platforms and in acidic oil and gas fields, it resists seawater corrosion and H₂S acidic gas corrosion, used for displacement compensation in oil and gas pipelines and heat exchangers.
3.Aerospace & High-Temperature Equipment: As a flexible connector in aircraft engine exhaust systems and high-temperature test benches, it can withstand the impact of high-temperature combustion gases, absorb vibration displacement, and ensure equipment operational stability.
4.Nuclear Power & Energy: Used in nuclear power plant reactor cooling systems and high-temperature boiler pipelines, its radiation corrosion resistance and high-temperature stability meet the stringent requirements of nuclear safety grade equipment.
5.Environmental protection and flue gas treatment: Compatible with flue gas desulfurization systems (absorption towers, flues), resistant to corrosion from sulfur-containing flue gas and acid and alkali sprays, and able to compensate for flue deformation caused by temperature fluctuations.
Contact information
We are your trusted supplier. If you are a buyer who needs our products or are interested in them, please contact us:
Sales Manager
Official Website: https://www.manufacturerpipe.com
Shuangzhong Intelligent Technology Co., Ltd.
Email: sarah@manufacturerpipe.com
WhatsApp: +86 18939250035
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