Stop guessing dimensions. Reduce specification errors by 60% with our comprehensive Class 150 & Class 300 flanged ball valve size chart. Engineered for US oil & gas, chemical, and industrial processing demands.
📥 Download Full Size Chart & Get Factory Quote →✓ Proven compliance with ASME B16.5 & API 6D ✓ 100% pressure tested ✓ Free technical consultation
Average cost of one valve mismatch incident
Inaccurate flange dimensions cause leaks, gasket failures, and catastrophic downtime. A 2mm deviation on a 6" Class 300 valve can halt an entire processing line.
of process downtime linked to incorrect valve specs
Engineering teams waste weeks on RFQ revisions when dimensional data is missing or inaccurate. Your suppliers should provide precise, standard-compliant size charts upfront.
Whether you are specifying valves for a new refinery expansion in Texas or upgrading a chemical plant in Rotterdam, one mistake in flange facing, bolt circle diameter, or face-to-face length leads to costly delays. Our US clients report that using an incomplete or non-standard size chart adds an average of 3–5 days to their procurement cycle.
American and European process plants operate under strict codes. ASME B16.5 governs flange dimensions and pressure-temperature ratings, while ASME B16.10 defines face-to-face dimensions for flanged end valves. API 6D further specifies design, testing, and material requirements for pipeline ball valves. A reliable supplier must provide data traceable to these exact standards.
Dimensions below are nominal and meet ASME B16.10 & B16.5 standards. For exact engineering drawings (PDF/DWG), please request via our contact form.
| NPS | Bore Type | Face-to-Face (mm) | Flange O.D. (mm) | Bolt Circle (mm) | No. of Bolts | Bolt Size (in) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 2" | Full Bore | 178 | 152 | 120.7 | 4 | 5/8 | 5.2 |
| 2" | Std. Port | 178 | 152 | 120.7 | 4 | 5/8 | 4.9 |
| 3" | Full Bore | 203 | 190 | 152.4 | 4 | 5/8 | 9.1 |
| 3" | Std. Port | 203 | 190 | 152.4 | 4 | 5/8 | 8.5 |
| 4" | Full Bore | 229 | 229 | 190.5 | 8 | 5/8 | 14.8 |
| 4" | Std. Port | 229 | 229 | 190.5 | 8 | 5/8 | 13.2 |
| 6" | Full Bore | 394 | 279 | 241.3 | 8 | 3/4 | 26.5 |
| 6" | Std. Port | 394 | 279 | 241.3 | 8 | 3/4 | 24.1 |
| 8" | Full Bore | 457 | 343 | 298.5 | 8 | 3/4 | 44.0 |
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* Class 300 dimensions available upon request. Custom flanges (RF, RTJ) offered. Contact us for full pressure-temperature charts.
Thriveon Valves supplies flanged ball valves, gate valves, and other industrial flow control solutions to prominent companies in the United States, Saudi Arabia, South Africa, Italy, and beyond. Our customers stay with us because we deliver exact specifications at competitive factory prices.
"We needed a custom Class 300 flanged ball valve for a high-pressure gas gathering station. Thriveon's size chart was perfectly aligned with our piping. They delivered 2 weeks ahead of schedule and the API 598 test results were flawless. We have standardized on them for all our ANSI valve needs."
✓ Verified Purchase | Oil & Gas, USA
"Matching flange dimensions across different suppliers used to be a nightmare. Thriveon provided us with 3D drawings and a dimensional report before production. Their full port design minimizes pressure drop perfectly in our chemical reactors. Highly recommended for European process industries."
✓ Verified Purchase | Chemical Processing, Netherlands
"We evaluated three Chinese suppliers for flanged ball valves. Thriveon was the only one that could provide a complete material traceability certification and NACE MR0175 compliance upfront. Their factory audit revealed a highly organized ISO 9001 production line. Pricing was 30% below European equivalents with faster delivery."
✓ Verified Purchase | Oil & Gas, Saudi Arabia
With over 14 years in the industrial valve industry, David has overseen the production of more than 200,000 flanged valves for customers in 50+ countries. He specializes in ASME/API standardized design for oil & gas, petrochemical, and water treatment applications. His technical articles are referenced by procurement teams globally.
✅ Published: May 2026 | ✅ Reviewed by Thriveon Quality Team
Stop overpaying and risking delays. Join hundreds of global engineers who trust Thriveon for accurate dimensions, factory-direct pricing, and reliable delivery.
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