Delivering high-quality nickel alloy and carbon steel fittings for Singapore projects
At Haihao Group, we pride ourselves on supplying premium piping products that meet the highest technical standards. Recently, we completed production scheduling for the sixth batch of fittings and flanges for a major Singaporean client. This delivery includes critical components made from Nickel Alloy ASTM B366 UNS N06625 and Carbon Steel ASTM A350 GR. LF2 CL1, certified according to the most stringent international requirements.

threaded pipe caps
What products were supplied?
ASME B16.11 Threaded Pipe Caps – Nickel Alloy ASTM B366 UNS N06625
ASME B16.11 45° Socket Weld Elbows – Nickel Alloy ASTM B366 UNS N06625
ASME B16.5 Socket Weld Flanges – ASTM A350 GR. LF2 CL1
ASME B16.11 90° Socket Weld Elbows – ASTM A350 GR. LF2 CL1

ASME B16.11 90° socket weld elbows A350 GR. LF2 CL1 NACE MR0175
These materials are selected for their excellent mechanical properties and corrosion resistance, ensuring long service life in demanding industrial environments.
Compliance with International Standards
All supplied products strictly comply with:
NACE MR0175/ISO 15156, ensuring resistance to sulfide stress cracking in sour service environments.
EN 10204 3.1 Certification, providing traceable Mill Test Certificates (MTCs) for material quality verification.
Each MTC clearly specifies the heat treatment type and cooling medium, essential for confirming the mechanical properties and microstructure integrity.
Additional Testing and Documentation
To guarantee product performance, Haihao Group provided:
- Original raw material MTCs
- Hardness testing reports
- Detailed heat treatment reports
- Ultrasonic Testing (UT) reports
All documents are ship classification society approved, further enhancing customer confidence.
By combining advanced manufacturing with strict quality control and complete technical documentation, Haihao Group ensures that every fitting and flange meets both project and regulatory requirements.
We are proud to continue serving the global market with high-performance piping solutions. Email:sales@haihaogroup.com