Haihao Group Delivers ASME B16.5 Weld Neck Flanges with HIC & SSC Test in One Week
In the field of industrial piping, material quality and corrosion resistance are non-negotiable. Haihao Group, a leading Chinese manufacturer of pipe fittings and flanges, recently completed a time-sensitive order for a domestic client, showcasing its exceptional capabilities in custom flange production, corrosion testing, and rapid delivery.
Project Overview: ASME B16.5 WN Flange RF for Critical Applications
The order included a batch of ASME B16.5 Weld Neck Flanges with Raised Face (RF):
20 pcs of 1-inch flanges
10 pcs of 16-inch flanges
These weld neck flanges are widely used in oil & gas, petrochemical, and pressure vessel applications due to their excellent ability to withstand high pressure and temperature. The raised face (RF) design enhances gasket compression, ensuring a secure and leak-proof seal.
The ASME B16.5 welded neck flanges that Haihao Group is-preparing to deliver and have passed the HIC and SSC tests
HIC and SSC Testing: Strict Material Integrity Requirements
To meet the stringent application environment, the client required corrosion resistance validation through:
HIC (Hydrogen-Induced Cracking) test
SSC (Sulfide Stress Cracking) test
Haihao Group prepared custom test blocks sized 250×250×25mm, heat-treated and machined from the same heat number as the flange material. The test blocks were processed to meet the following chemical composition limits:
Sulfur (S) < 0.010%
Phosphorus (P) < 0.015%
These low S and P levels are critical in resisting hydrogen-induced damage and sulfide stress corrosion, especially in sour service environments with H₂S exposure.
Rapid Delivery: 1 Week from Start to Shipment
Despite the complexity and technical requirements of the order, Haihao Group delivered the entire batch—including qualified test blocks—within one week. This fast turnaround reflects our:
- In-house heat treatment capability
- On-site chemical and mechanical testing lab
- Mature quality control system
- Strong stock of carbon steel bar and forged flange materials
ASME B16.5 Weld Neck Flanges with Raised Face
Why Clients Trust Haihao for Corrosion-Resistant Flanges?
Haihao Group is widely recognized for producing custom and standard flanges that meet international codes such as:
- ASME B16.5
- EN 1092-1
- GOST 33259
- DIN and JIS standards
Our team has deep experience with HIC/SSC-resistant carbon steel flanges, often used in:
- Sour oil and gas service
- Offshore drilling systems
- Pressure vessels and pipelines exposed to H₂S
- Quality-First, Customer-Focused
Our manufacturing process ensures:
Full material traceability
Conformance to EN 10204 3.1 or 3.2 certification
In-house NDE, PMI, and corrosion testing
We also support customers in preparing qualification test blocks, mechanical samples, and third-party witnessed tests as required by their project specifications.
Conclusion
For critical applications requiring low-sulfur, low-phosphorus steel flanges and compliance with HIC and SSC testing, Haihao Group offers a one-stop solution. Whether your project is in China, the Middle East, Europe, or Southeast Asia, we ensure fast delivery, technical reliability, and standards compliance.
Need HIC/SSC-tested flanges fast?
Contact Haihao Group today for a custom quote or consultation. Our engineering and quality control teams are ready to support your project needs—on time and to spec.