1. Product Overview
Black Steel Pipe 4 Inch Schedule 40 is a durable carbon steel pipe designed for demanding industrial, commercial, and construction applications requiring reliable strength and pressure performance. Its 4-inch nominal diameter and Schedule 40 wall specification provide a practical balance of structural integrity, flow capacity, and cost efficiency. The black steel finish makes it well suited to general-purpose piping systems where corrosion protection can be applied as required. It is a strategically important industrial piping solution for infrastructure, fabrication, utilities, and mechanical projects requiring dependable bulk supply.
2. Key Specifications & Technical Characteristics
- Material: Carbon steel
- Pipe Type: Black steel pipe
- Nominal Size: 4 inch (NPS 4)
- Schedule: Schedule 40
- Outside Diameter: Approximately 4.500 inches (114.3 mm)
- Wall Thickness: Approximately 0.237 inches (6.02 mm)
- Form: Round, hollow tubular section
- Surface: Black steel finish
- Grade: Industrial carbon steel; grade available according to project requirements
- End Options: Plain end, beveled end, or threaded configurations subject to specification
- Packaging: Bundled and secured for bulk transportation
- Origin: Available according to supplier and project sourcing requirements
- Documentation: Mill test certificates and quality documentation available upon request
3. Core Industrial Applications
- Construction & Infrastructure: Structural supports, building services, mechanical installations, and general-purpose piping.
- Industrial Manufacturing: Process lines, equipment fabrication, machinery assemblies, and plant piping systems.
- Water & Utility Systems: Suitable for selected non-corrosive water and utility applications where the specified pipe standard is appropriate.
- Oil & Gas & Energy: Used in suitable above-ground, utility, and mechanical piping applications subject to project specifications.
- Fabrication & Engineering: Suitable for cutting, welding, forming, and custom fabrication requirements.
Its standardized dimensions, robust carbon steel construction, and readily weldable form support efficient fabrication and installation while providing a practical balance between durability and procurement cost.
4. Competitive Advantages
- Quality Consistency: Controlled dimensional specifications support dependable fabrication and installation.
- Supply Reliability: Suitable for recurring industrial procurement and bulk sourcing programs.
- Logistics Capability: Bundled for efficient handling, loading, transportation, and international shipment.
- Cost Competitiveness: Schedule 40 construction provides a practical combination of strength, service performance, and material efficiency.
- Durability: Carbon steel construction delivers reliable mechanical strength for demanding industrial environments.
- Technical Documentation: Product specifications, certificates, and inspection documentation can be provided according to buyer requirements.
- Strategic Sourcing: Suitable for contractors, distributors, fabricators, and industrial buyers seeking standardized steel pipe in commercial volumes.
5. Commercial & Supply Information
- Minimum Order Quantity (MOQ): BULK 20 MT
- Loading Capacity: Approximately 20–25 MT per 20-foot container, subject to pipe length, bundling, loading configuration, and applicable container weight limits.
- Supply: Bulk and international supply available










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