Argentina Natural Gas Pipeline Project Shipment & BV Third-Party Verification

A dedicated batch of pipes and pipeline components has completed third-party inspection for an Argentina natural gas pipeline fabrication project-where material control, dimensional accuracy, and traceability are non-negotiable.

What stood out in this release is the tight bore (ID) control and clean surface roughness results on the ASTM A106 Grade B (ASME B36.10) seamless pipes, along with the dual-standard flange compliance required by the project.

This package covers carbon steel pipe and matching pipeline components for gas transmission fabrication, including:

• Line Pipe: API 5L SAWL (project grades include X52 / X70; X70 marking example recorded in inspection)
• Seamless Pipe: ASME B36.10, ASTM A106 Gr. B, BE, 11.7 m
• Flanges: MSS SP-44 + ASME B16.5, materials including ASTM A694 Gr. F42 (290) / F52 (360) / F70 (485); plus ASME B16.5 A105 items
• Threadolet: MSS SP-97, ASTM A694 Gr. F52 (360)
• Spiral Wound Gasket: ASME B16.20; material configuration includes 304SS + flexible graphite (FG) in the winding/inner ring combination
• Stud Bolts + Heavy Hex Nuts: bolting verified to ASTM A193 Gr. B7 / ASTM A194 Gr. 2H
• Reducer Eccentric / Cap / Tee: MSS SP-75 items including Gr. WPHY-52 and Gr. WPHY-70

For many pipeline fabrication projects, flanges become the "acceptance bottleneck" because drawings, classes, and face details must match perfectly.

This batch includes welding neck flanges manufactured and marked to both MSS SP-44 and ASME B16.5, with high-strength ASTM A694 grades (F42/F52/F70) used across sizes and rating requirements.

For A106 Gr. B (ASME B36.10) seamless pipe, the inspection recorded both dimension checks and surface roughness checks before painting-because bore stability and surface condition directly affect fit-up, flow profile, and downstream fabrication consistency.

Bore (ID) and Dimensional Control (Recorded Results)

• NPS 16" SCH80, 11.7 m:

ID measured 365.2–366.8 mm (a 1.6 mm window), with length measured 11726–11730 mm

• NPS 24" SCH80, 11.7 m:

ID measured 545.6–548.1 mm (a 2.5 mm window), with length measured 11714–11717 mm

In practical terms: tighter bore spread means fewer "why doesn't this line up" moments during fit-up and assembly.

Surface Roughness (Before Painting)

• NPS 24 pipes: 123–162 µin
• NPS 16 pipes: 134–167 µin

Across this batch, third-party inspection activities included visual inspection, quantity verification, dimensional checks, marking verification, and document review-with additional checks such as ellipticity verification for SAWL line pipe.

For bolting and gaskets, the inspection also recorded bolt/nut fitting tests (to avoid thread seizure/jamming risk) and confirmed gasket material designation and compliance checks.

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FAQ

 

 

01.What were the verified inner diameter (ID) results for ASTM A106 Gr.B seamless SCH 80 pipes?

Recorded ID ranges were 365.2–366.8 mm (NPS 16 SCH 80, 11.7 m) and 545.6–548.1 mm (NPS 24 SCH 80, 11.7 m)-showing very tight bore control for fabrication fit-up.

02.What surface roughness values were measured on the A106 Gr.B pipes (before painting)?

Roughness readings were 123–162 µin (NPS 24) and 134–167 µin (NPS 16), supporting a clean surface condition for coating readiness and acceptance.

03.Why are both MSS SP-44 and ASME B16.5 highlighted for the Class 600 flanges?

Pipeline projects often specify either standard on drawings/POs; flanges marked and verified to MSS SP-44 + ASME B16.5 (with ASTM A694 F42/F52/F70) reduce the risk of standard mismatch rejection during receiving and QA review.

04.How should stud bolts/nuts be ordered to prevent flange-up delays on site?

Specify ASTM A193 B7 / ASTM A194 2H, hot-dip galvanizing to ASTM F2329, correct length/thread engagement, and require bolt–nut fit testing to avoid thread seizure and assembly stoppages.

Certifications

 

CE Certificate

ISO 9001 Certificate

API Q1 Certificate

ABS Certificate

AP-5L Certificate

API-5CT Certificate