Normalized Forged Steel Solutions: Haihao Group Dispatches ASTM A105N Flanges to Turkmenistan

Haihao Group has completed the production and export dispatch of a broad range of normalized carbon steel forged flanges and spectacle blinds for a major gas processing facility expansion in Turkmenistan. Manufactured in accordance with ASME B16.5 and ASME B16.47 Series A dimensional standards, this delivery encompasses socket weld flanges, weld neck connections, and line-isolation spectacle blinds engineered for Class 150 and Class 300 pressure ratings.

Shipment Manifest & Technical Specifications

Sourcing from a certified ASTM A105N ASME B16.5 forged flange manufacturer guarantees exact flange bore matching, controlled raised face (RF) smooth serration finishes, and full normalized heat treatment. Below is the specification breakdown for the Turkmenistan consignment:

Socket Weld (SW) Flanges: DN25 Class 150 (SCH 160), DN25 Class 300 (SCH 160), and DN40 Class 300 (SCH 160) | Raised Face (RF) Smooth Finish 125 μin.Ra | Material: ASTM A105N.

Medium to Large-Bore Weld Neck (WN) Flanges: DN80 Class 150 (SCH 40), DN150 Class 300 (SCH 40), DN200 Class 150 (SCH 20), and DN50 Class 300 (SCH 80) | Raised Face (RF) Smooth Finish 125 μin.Ra | Material: ASTM A105N.

Extra Large-Diameter Weld Neck Flange: DN1000 / 40″ Class 150 (SCH XS) | Standard: ASME B16.47 Series A | Raised Face (RF) Smooth Finish 125 μin.Ra | Material: ASTM A105N.

ASME B16.48 Spectacle Blinds: DN50 Class 150, DN80 Class 150, and DN150 Class 150 | Raised Face (RF) Smooth Finish 125 μin.Ra | Material: ASTM A105N.

Metallurgical Normalization & Low-Temperature Impact Integrity

Central Asian gas treatment plants experience harsh ambient temperature swings and intense dynamic pressures. Standard carbon steel forgings risk notch sensitivity under low outdoor temperatures. To eliminate brittle fracture risks, every item crafted by our ASTM A105N ASME B16.5 forged flange manufacturer facility undergoes full normalizing heat treatment (880℃ to  920℃).

Normalizing refines the austenitic grain structure, improving notch toughness and ductility across heavy wall sections—from small SCH 160 socket weld hubs up to the massive 40-inch (DN1000) SCH XS ASME B16.47 Series A flange ring.

Machining Precision, Facing Finish & Quality Assurance

As a trusted ASTM A105N ASME B16.5 forged flange manufacturer, Haihao Group enforced rigorous quality control protocols prior to export packaging:

Controlled Smooth Facing Finish: Raised face (RF) contact surfaces were CNC-turned to achieve a controlled smooth serration finish of 125 μin.Ra (), ensuring optimal seating stress when paired with spiral wound gaskets in hydrocarbon service.

Bore & Wall Thickness Alignment: Weld neck hubs were precision-machined to match pipe schedules (SCH 20, SCH 40, SCH 80, SCH 160, and SCH XS), preventing internal flow turbulence.

Non-Destructive Testing & Certification: Magnetic particle testing (MPI) was performed on socket weld radii and large-diameter flange hubs. Shipments included EN 10204 3.1 Mill Test Certificates verifying chemical heat analysis, mechanical tensile/yield testing, and normalized heat treatment charts.

Working alongside a proven ASTM A105N ASME B16.5 forged flange manufacturer ensures complete material traceability and seamless installation during field piping alignment.

Request Your Turkmenistan Project Quotation Today

In need of normalized ASTM A105N forged flanges, ASME B16.47 large-diameter weld necks, or ASME B16.48 spectacle blinds for your energy assets? Partner with an industry-leading ASTM A105N ASME B16.5 forged flange manufacturer. Contact the Haihao Group commercial sales engineering team today for quick pricing and technical support.