Haihao Group Delivers ASME B16.5 Flanges to Indonesia Project

Haihao Group has successfully completed the shipment of a wide range of ASME B16.5 flanges to a customer in Indonesia. The delivery includes blind flanges, weld neck flanges, and spectacle blinds, covering multiple pressure classes and materials to meet diverse pipeline system requirements.

These flanges are manufactured in strict accordance with international standards and are widely used in oil & gas, petrochemical, power generation, and industrial pipeline projects.

Product Scope – Carbon Steel & Stainless Steel Flanges

The Indonesia order includes both carbon steel flanges and stainless steel flanges, designed for applications ranging from medium pressure to high-pressure service.

Blind Flanges (RF & RTJ)

Haihao Group supplied multiple blind flange configurations to support pipeline isolation and maintenance operations.

Key specifications include:

• Facing types: RF (Raised Face) and RTJ (Ring Type Joint)

• Pressure classes: Class 150, Class 300, Class 1500

• Sizes: 0.75 inch

• Materials:

  • ASTM A105 (carbon steel)

  • ASTM A350 LF2 Class 1 (low-temperature carbon steel)

• Standards: ASME B16.5

• Surface treatment: Black painting and hot-dip galvanized

One RTJ blind flange was supplied with a 1/2″ NPTF threaded hole, providing added flexibility for pressure testing and venting applications.

These ASME B16.5 blind flanges for Indonesia pipeline projects offer reliable sealing performance under high-pressure conditions.

Weld Neck Flanges (WN RF & WN RTJ)

The shipment also includes weld neck flanges designed for high-strength and high-integrity pipeline connections.

Carbon steel weld neck flanges:

• Types: WN RF, WN RTJ

• Pressure ratings: Class 150, Class 1500

• Wall thickness: SCH80, SCH120, SCHXXS

• Sizes: 1″ to 4″

• Materials:

  • ASTM A105

  • ASTM A350 LF2 CL1

• Standard: ASME B16.5

Stainless steel weld neck flanges:

• Pressure classes: Class 150, Class 300
• Wall thickness: SCH10S, SCH80S
• Materials: ASTM A182 F316 / F316L
• Sizes: 1″, 1.5″, 2″

These weld neck flanges for high-pressure pipeline systems provide excellent strength, smooth stress distribution, and long service life.

Spectacle Blind Flange

To support safe pipeline isolation during maintenance, the order also includes spectacle blind flanges.

Product details:

• Type: Spectacle Blind (Figure-8 Blind)
• Size: 2″
• Pressure class: Class 300
• Thickness: 10 mm
• Facing: FF (Flat Face)
• Material: ASTM A240 316 / 316L
• Standards: ASME B16.48, NORSOK L-001

Spectacle blinds are commonly used in oil & gas pipelines where visual confirmation of isolation is required.

Quality Assurance and Compliance

All flanges shipped to Indonesia were produced under strict quality control, including:

• Material traceability
• Dimensional inspection
• Surface finish inspection
• Compliance with ASME B16.5 and ASME B16.48

Each product meets project specifications and international engineering standards.

Reliable Flange Supplier for Indonesia and Southeast Asia

With extensive export experience, Haihao Group supplies carbon steel and stainless steel flanges to customers across Indonesia and Southeast Asia. Our product range covers:

• ASME B16.5 blind flanges
• Weld neck flanges RF & RTJ
• Spectacle blind flanges per ASME B16.48

Haihao Group remains committed to delivering stable quality, competitive solutions, and professional service for global pipeline projects.