Haihao Group Ships ASTM A350 LF2 + Alloy 625 Cladded Spade Line Blind to Kazakhstan
Haihao Group has successfully completed the production and shipment of a 24″ Class 900 cladded spade line blind to a customer in Kazakhstan. The product is manufactured in accordance with ASME B16.48 and designed for sour service conditions in offshore and low-temperature environments.
This project once again demonstrates Haihao Group’s capability in supplying through bolted RTJ spade blinds with Alloy 625 cladding for demanding oil and gas applications.
Product Overviewov
Product Type: Cladded Spade Line Blind (Through Bolted)
Size: 24” (600 mm)
Pressure Rating: Class 900
Design Standard: ASME B16.48
Base Material: ASTM A350 LF2 CL1 (Low Temperature Carbon Steel)
Cladding Material: Alloy 625
Facing Type: Ring Type Joint (RTJ)
Service Condition: Sour Service
Compliance: NACE MR0175
The RTJ groove and sealing surfaces are overlay welded with 3 mm Alloy 625, ensuring excellent corrosion resistance in aggressive environments.
ASME B16.48 ASTM A350 LF2 CL1 900 Alloy 625 cladded RTJ spade line blind
Designed for Low Temperature and Sour Service Applications
The base material ASTM A350 LF2 Class 1 is widely used for low temperature service due to its impact toughness and mechanical reliability. Combined with Alloy 625 weld overlay, the cladded spade blind offers enhanced resistance to:
- Sulfide stress cracking (SSC)
- Pitting and crevice corrosion
- Chloride-induced corrosion
- Harsh offshore environments
Because this Alloy 625 cladded line blind for sour service complies with NACE MR0175, it is suitable for oil and gas systems where hydrogen sulfide (H₂S) is present.
Through Bolted RTJ Spade Blind – Reliable Isolation Solution
The supplied unit is a through bolted spade line blind with RTJ facing, designed for positive isolation in high-pressure piping systems. Compared with standard paddle blinds, the through bolted design provides:
- Higher structural stability
- Reliable sealing performance under Class 900 pressure
- Improved safety during maintenance operations
The ASME B16.48 Class 900 RTJ spade blind is typically used in offshore platforms, refineries, and petrochemical plants where safe line isolation is critical.
Strict Manufacturing and Quality Control
For this Kazakhstan project, Haihao Group implemented comprehensive quality procedures, including:
- Material certification verification (LF2 + Alloy 625)
- Weld overlay thickness inspection (3 mm minimum)
- RTJ groove machining inspection
- Dimensional and pressure class verification
- Marking and export packing according to project requirements
The products were packed and marked for delivery to the designated offshore supply base, ensuring full traceability and safe international transportation.
Supporting Energy Projects in Central Asia
Kazakhstan is a key region for oil and gas development, particularly in offshore and sour service environments. By delivering high-performance ASTM A350 LF2 + Alloy 625 cladded spade blinds, Haihao Group strengthens its position as a trusted manufacturer of:
- ASME B16.48 spade line blinds
- RTJ Class 900 line blanks
- Alloy 625 weld overlay flange products
- Sour service pipeline isolation components
If you are sourcing a reliable Alloy 625 cladded spade line blind manufacturer or require NACE compliant RTJ line blinds for offshore projects, Haihao Group is ready to provide technical support and competitive quotations.