Inconel 625 Slip-On Welding Flange For Pipeline Stress Distribution
I. Core Advantages of Material
1.Extreme Corrosion Resistance
Inconel 625 takes nickel as the matrix (≥58%), combined with alloying elements such as chromium (20 - 23%), molybdenum (8 - 10%), and niobium (3.15 - 4.15%):
▶Chromium forms a dense oxide film, resisting chloride stress corrosion cracking. Its pitting corrosion resistance far exceeds that of 316 stainless steel in seawater and salt - fog environments.
▶Molybdenum enhances the tolerance to reducing media like sulfuric acid and hydrochloric acid, enabling stable service in strong - corrosion chemical scenarios .
▶Niobium and molybdenum synergistically strengthen the matrix, preventing intergranular corrosion. It still maintains excellent corrosion resistance after welding without additional heat treatment for performance restoration.
2.High - Temperature Stability and High Strength
▶It can work stably in the temperature range from - 198℃ (deep cold) to 980℃ (high temperature). It still maintains high strength at 600 - 1000℃, with excellent creep resistance and oxidation resistance, suitable for high - temperature working conditions such as nuclear power and aerospace.
▶It achieves high strength through solution strengthening (no precipitation hardening heat treatment required). The tensile strength is ≥827MPa and the yield strength is ≥414MPa, so the risk of deformation is low when withstanding high - pressure fluids.
II. Structural Value of SO Flange
1.Connection Reliability
The slip - on welding structure has a short neck transition. After the pipe is inserted into the inner diameter of the flange, it is connected by fillet welding on the end face:
▶The neck enhances the rigidity of the flange and disperses the pipe stress. Compared with the slip - on flange, it has stronger deformation resistance and more stable sealing under high - pressure and vibration working conditions.
▶The welding difficulty is lower than that of the weld neck (WN) flange, and the on - site installation efficiency is high, suitable for pipeline projects with batch construction.
2.Sealing Adaptability
▶The conventional sealing face is a raised face (RF), suitable for asbestos rubber gaskets, metal - clad gaskets, etc., meeting the sealing requirements of medium and low pressure. For harsher working conditions, customized male - female faces (MFM) and ring type joint (RTJ) faces can be made, and better sealing can be achieved by matching with corresponding gaskets.
III. Typical Application Scenarios
1.Chemical and Petrochemical Industries
In the pipeline systems of strong acids (sulfuric acid, hydrochloric acid), strong alkalis (sodium hydroxide), and high - temperature reaction kettles, the Inconel 625 SO flange can resist medium corrosion and temperature impact, ensuring the long - term operation of the device.
2.Marine Engineering Field
In the oil - transportation/gas - transportation pipelines of seawater desalination plants and offshore drilling platforms, due to the high chloride salt content and strong corrosion of seawater, the seawater corrosion resistance of Inconel 625 plus the connection strength of the SO flange can avoid pipeline leakage and structural failure. The subsea gas - production system of Norway's Equinor adopts such flanges, and there is no corrosion failure record after 20 years of service.
3.Nuclear Power and New Energy
In the cooling loops of nuclear reactors and the high - temperature heat - conducting oil pipelines of CSP (Concentrated Solar Power) plants, the Inconel 625 SO flange can withstand high temperature, radiation, and medium corrosion, ensuring system safety.
IV. Quality and Certification Endorsement
▶It complies with ASTM B564 and ASME B16.5 to ensure dimensional accuracy and mechanical properties.
▶It has passed the NACE MR0175 certification, suitable for high - sulfur medium environments in oil and gas fields.
▶Material quality certificates and spectral detection reports are provided ex - factory, allowing component traceability.
Application Value of Inconel 625 Slip-On Flange
| Industry |
Key Applications |
Benefits |
Edge over Standard Flanges |
| Chemical/Petrochemical |
Acid/alkali pipelines,
high-temp reactors
|
Resists corrosion & thermal shock |
3-5x better corrosion resistance;
90%+ strength retention at high temps
|
| Marine Engineering |
Seawater desalination, offshore pipelines |
Withstands seawater & vibration |
20+ year seawater lifespan;
40% stronger against vibration
|
| Nuclear/New Energy |
Reactor cooling,
CSP heat transfer
|
Handles high temp, radiation, and harsh media |
<0.1% seal failure rate (vs. 5% for standard flanges) |
| High-End Manufacturing |
Aerospace engines, semiconductor systems |
Ensures purity and reliability in extreme conditions |
No toughness loss at -198℃;
prevents medium contamination
|
DINGSCO
Hunan Dinghan New Material Technology Co., Ltd. (DINGSCO) specialized in Nickel Based Corrosion Resistant and High Temperature alloys products which used in the world’s most technically demanding industries and applications.We are dedicated to providing our customers with best quality products, fastest possible deliveries, most competitive prices of Nickel Based Corrosion Resistant and High Temperature alloys in bars, rods, forged flanges, valve parts (Ball, Stem, Seat Ring, etc), forged shapes (shafts, discs, blocks, hubs, rings, cylinders and other custom shapes) according to ASTM, ASME, API, AMS, NACE and other industry standards.
PROFESSIONAL NICKEL ALLOY MANUFACTURER
- Monel, Incoloy, Inconel, Hastelloy
- VIM, ESR, Forging, Heat treatment, Machining
- Round Bar, Ball, Stem, Ring, Flange, etc
- ISO9001, API-6A, API-20B, PED, NORSOK
CORE VALUE
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- SCIENCE AND TECHNOLOGY INNOVATION STRATEGY
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