Different country has its own popular sizes， detailed content is as below:
1. North America (USA, Canada)
Mainstream Sizes:
- Construction Industry: Φ6-24 inches (150-600mm) seamless pipes, used for oil and gas pipelines and steel structures.
- Machinery Manufacturing: Φ1-4 inches (25-100mm) welded pipes, used for automotive parts and agricultural machinery.
- Energy Industry: Large-diameter thick-walled pipes (Φ24 inches+, wall thickness ≥20mm), used for shale oil and gas pipelines.
Features:
- Preference for American standards (ANSI/ASME B36.10M), with strict tolerances and emphasis on high strength (API 5L standard).
Reasons:
- Demand from large energy projects (e.g., Gulf of Mexico oil fields), developed automotive industry, and high prevalence of steel structures in construction.
2. Europe (Germany, France, UK, etc.)
Mainstream Sizes:
- Construction & Bridges: Φ10-300mm (primarily galvanized pipes), used for structural support and heating systems.
- Industrial Equipment: Φ20-80mm precision welded pipes, used for hydraulic systems in machinery.
- Underfloor Heating Systems: Φ16-25mm thin-walled stainless steel composite pipes (combined with carbon steel).
Features:
- Compliance with European standards (EN 10210/10217), emphasizing eco-friendliness (e.g., galvanization reduces maintenance).
Reasons:
- High-density urban construction demands lightweight, corrosion-resistant pipes; stringent environmental regulations drive galvanized pipe adoption.
3. Asia (China, Japan, South Korea)
China:
- Mainstream Sizes:
- Infrastructure Projects: Φ325-630mm (X70/X80 high-strength steel), used for long-distance pipelines like the West-East Gas Pipeline.
- Real Estate: Φ40-150mm welded pipes, used for scaffolding and steel structures.
- Rural Markets: Φ20-50mm low-pressure fluid pipes (GB/T 3091), used for irrigation and low-pressure gas.
- Features: High volume and low price, with exports to Southeast Asia; accelerating R&D for premium pipeline steels (X90/X100).
Japan:
- Mainstream Sizes:
- Automotive Industry: Φ5-30mm cold-drawn precision pipes (JIS G3444), used for automotive exhaust systems.
- Nuclear Equipment: Φ50-150mm ultra-low-carbon stainless steel composite pipes (JIS SPV).
- Features: High precision and lightweight, tailored for precision manufacturing needs.
India:
- Mainstream Sizes: Φ150-400mm (ERW welded pipes), used for rural irrigation and low-cost construction.
- Features: Price-sensitive, dominated by small-to-medium specifications; heavy reliance on imports (China, South Korea).
4. Middle East (Saudi Arabia, UAE)
Mainstream Sizes:
- Desalination Plants: Φ36-120 inches (900-3000mm) X65/X70 thick-walled pipes.
- High-Temperature/High-Pressure Pipelines: Φ24-60 inches (600-1500mm), corrosion-resistant (3PE coating) for salt spray.
- Features: Mega-projects drive demand (e.g., NEOM City); preference for API/EN-certified pipes.
5. South America (Brazil, Argentina)
Mainstream Sizes:
- Mining Transport: Φ89-159mm (4-6 inches) low-alloy pipes, used for hydraulic systems in mining.
- Agricultural Irrigation: Φ50-100mm galvanized pipes, adapted to tropical climates (rust resistance).
- Features: Reliance on Chinese and South Korean investments (e.g., Vale projects); focus on mid-to-low-end pipes.
6. Africa (Nigeria, Egypt)
Mainstream Sizes:
- Infrastructure Projects: Φ219-426mm (8-16 inches) API 5L PSL1 pipes, used for oil pipelines.
- Low-Cost Construction: Φ50-100mm black pipes (uncoated), used for temporary housing and simple supports.
- Features: Dominated by Chinese GB-standard exports; prioritizes affordability over precision.
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