---
title: Stainless Steel Flange Solutions for Chemical Equipment
date: 2025-04-18T03:29:04Z
modified: 2026-08-06T14:53:45Z
permalink: "https://www.longanflange.com/solution/chemical-equipment-flanges/"
type: page
status: publish
excerpt: ""
wpid: 2198
timestamp: 2026-08-06T14:53:45Z
tags: []
---
# Chemical Stainless Steel Flange
Built for extreme chemical environments. We deliver corrosion-resistant, high-strength stainless steel flanges. Customized for your toughest applications.
[ Request Free Quote
](#form)
# Our STRENGTHS
At Longan Flange**,** we understand the extreme demands of the chemical and petrochemical industries. Piping systems here face high pressure, high temperature, and highly corrosive media — often all at once.
We help you solve challenges like:
- Aggressive corrosion from chlorides, acids, alkalis, and urea
- Demanding sealing requirements under high pressure
- Frequent disassembly and inspection needs without damaging flanges
- Equipment compatibility issues with valves, pumps, and heat exchangers
- Premature failures due to improper material selection
## EXPLORE OUR sTAINLESS STEEL FLANGES FOR CHEMICAL
We offer a full range of stainless steel flanges specifically designed for chemical applications.
Whether you’re working with acid gas, urea, EDC-VCM, or high-temperature steam, **we provide the right connection for your system**.
We manufacture Stainless Steel flanges according to multiple international and industry standards:
- GB/T 9119-2010
- HG/T 20592-2009 / HG/T 20615-2009
- ASME / ANSI
- DIN / BS / JIS
## EXPLORE OUR sTANDARD CHEMICAL FLANGES
Sourced raw materials from Tsingshan Group, our material selection is tailored to your process conditions, ensuring maximum performance in corrosive and high-pressure environments.
- 304: F304, S30408, S30408II
- 304/304L: : F304, S30408, S30408II, S30403, 30403II
- 316L: 31603, 31603II, 31603III
- TP310S (06Cr25Ni20) — excellent high-temperature resistance
- TP321 (06Cr18Ni11 / T321-32168) — anti-intergranular corrosion
- 2205 (F51 / S22053III) — chloride resistance + high strength
- 2507 (F53) — exceptional corrosion resistance & strength for critical service
## [Slip On Flange](https://longanflange.com/products/slip-on-flange/)
[ Flange Detail
](/products/slip-on-flange/)
## [Weld Neck Flange](https://longanflange.com/products/weld-neck-flange/)
[ Flange Detail
](/products/weld-neck-flange/)
## [Plate Flange](https://longanflange.com/products/plate-flange/)
[ Flange Detail
](/products/plate-flange/)
## [Blind Flange](https://longanflange.com/products/blind-flange/)
[ Flange Detail
](/products/blind-flange/)
## [Socket Weld Flange](https://longanflange.com/products/socket-weld-flange/)
[ Flange Detail
](/products/socket-weld-flange/)
## [Lap Joint Flange](https://longanflange.com/products/stainless-steel-lap-joint-flange/)
[ Flange Detail
](/products/stainless-steel-lap-joint-flange/)
## [Threaded Flange](https://longanflange.com/products/threaded-flange/)
[ Flange Detail
](/products/threaded-flange/)
## [Custom Flange](/custom-flange/)
[ Flange Detail
](/custom-flange/)
We also offer customized chemical flanges to meet your unique and demanding operating conditions.
[**CONTACT OUR SPECIALIST**](#form) now and let us know your requirements—we will get back to you within 24 hours.
## PRODUCT CATALOG
Get Instant Data & Drawings for Your custom flange Solution
## Leak Prevention as core
We understand that even the smallest leak in a chemical plant can lead to environmental hazards, production shutdowns, or safety incidents. That’s why our flanges are:
- **Precisely machined** for optimal gasket compression and sealing
- Subjected to **rigorous pressure and leakage tests** before shipment
- International Standard Compliance
- **Available with surface finishes** that enhance sealing performance
## Corrosion Resistance You Can Count On
Chemical processes often involve aggressive media — acids, alkalis, chlorides, and high-temperature steam.
All materials are traceable and tested to international standards. Custom material selection is also available based on your process conditions.
We carefully select materials that resist corrosion at the molecular level:
- 316L and 321 for general chemical resistance
- Duplex 2205 and Super Duplex 2507 for chloride-heavy and acidic environments
- 310S for oxidation resistance at high temperatures
## Built for Pressure Proven Under Stress
Our flanges are engineered to perform under **high operating pressures**, even in dynamic systems with temperature fluctuations or vibration. We achieve this by:
- Using high-strength stainless and duplex steels
- Applying strict dimensional tolerances to ensure tight, secure fits
- Offering reinforced types such as weld neck flanges for high-pressure zones
## Longer Service Life Less Downtime
We design our flanges not just to perform, but to **last**. With superior resistance to corrosion, cracking, and fatigue, Longan flanges:
- Have extended operational lifespans, even in continuous-use environments
- Reduce the frequency of replacements and shutdowns
- Lower your total cost of ownership (TCO) over time
## Where Our Flanges Are Used
## **Urea Production Plants**
High-pressure flange connections in urea synthesis loops
## **Acid/Alkali Transport Pipelines**
Pipeline systems for sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide, etc.
## **Storage Tanks and Pressure Vessels**
Manway flanges, nozzles, and inspection ports on chemical storage tanks
## **Heat Exchangers and Reactors**
Connection of heat exchanger tubes, condensers, evaporators, and chemical reactors
Ask for Flange at your BEST PRICE!
[ Contact Us Know
](#form)
## Certifications
## Exhibition
Unlock Bulk Order Savings: Claim Exclusive Pricing for Chemical Stainless Steel Flanges
Please complete our request form or contact us directly via email at mft@longanflange.com, phone at +86-15258415825, or WhatsApp for a personalized quote from our product specialists.
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](https://www.youtube.com/@LongAnflange)
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](https://www.linkedin.com/company/wenzhou-long-an-flange-co-ltd)
Quelles nuances d’acier inoxydable recommandez-vous pour l’exposition à l’acide chlorhydrique ?
Notre acier 316L avec surfaces électropolies (Ra ≤ 0,8 μm) présente une résistance exceptionnelle jusqu'à une concentration de 10% à 50 °C. Pour des concentrations plus élevées, nous recommandons l'Hastelloy C-276® avec surfaces d'étanchéité revêtues de PTFE.
Comment vos brides empêchent-elles la fissuration par corrosion sous contrainte dans les environnements chlorés ?
All chemical-grade flanges undergo:
- Solution annealing (1040-1120°C quench)
- Ferrite content control (<0.5% for 316L)
- X-ray diffraction residual stress analysis
Pouvez-vous fournir une protection contre la corrosion caverneuse pour les connexions à brides ?
Yes, we offer:
- Laser-machined serrations (ASME B16.20 compliant)
- Integrated corrosion-resistant spacer designs
- Hybrid graphite/PTFE gasket solutions
What’s your lead time for ASME B16.5 Class 900 flanges in duplex 2205?
Standard : 14 jours. Commandes d’urgence : 7 jours (en utilisant un stock de matériel préqualifié avec documentation de traçabilité PMI).
Vos produits sont-ils conformes à la norme NACE MR0175 pour le service acide ?
Our 316L/904L/6Mo alloys are:
- Certified for H₂S environments (<15psi partial pressure)
- hardness-controlled (<22 hrc)
- full igc testing (astm a262 practice e)
Quelles industries utilisent couramment les brides ASME ?
Les brides ASME sont largement utilisées dans des industries telles que le pétrole et le gaz, le traitement chimique, la production d'électricité, le traitement de l'eau, la transformation des aliments et les applications marines en raison de leur fiabilité et de leur respect des normes de sécurité.
Comment garantir la planéité des brides pour les applications haute pression ?
Our CNC-machined flanges guarantee:
- 0.05mm/m flatness tolerance
- Surface finish options from 125-600 grit
- 3D optical scanning reports available
Quelle documentation de qualité fournissez-vous ?
All chemical flanges include:
- Mill test certificates
- Liquid penetrant test reports (ASME V Art.6)
- Positive material identification (PMI)
- Heat treatment charts
What’s your approach to minimizing galvanic corrosion?
We implement:
- Insulating kit options (G10 CR grade)
- Sacrificial anode integration
- Noble metal coating compatibility analysis