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  • API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes
  • API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes
  • API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes
  • API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes
  • API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes
  • API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes
API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes

API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes

  • 50 - 499 Tons
    $880
  • >= 500 Tons
    $780
View product details

API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Structural Support & Industrial Infrastructure: Designed to withstand high pressure and heavy loads, these spiral-welded steel pipes are ideal for structural applications in construction, oil/gas pipelines, and water supply systems.
  • Corrosion Resistance & Durability: Equipped with a protective coating (e.g., polyurethane/epoxy), the pipes ensure longevity in harsh environments, resisting corrosion and extreme temperatures.

Key features

  • 1. Corrosion-Resistant Material Technology

    • With an epoxy/polyurethane protective coating, these pipes resist corrosion 30% better than bare steel in harsh environments*. The non-alloy low carbon steel body ensures durability while maintaining cost efficiency.

  • 2. Spiral Welded Construction for Structural Integrity

    • With spiral welding technology, achieve seamless load distribution and pressure resistance, making them 20% stronger than straight-welded pipes* for large-diameter applications like oil/gas pipelines.

  • 3. High-Performance Specifications

    • With a 36-inch diameter and Schedule 40 thickness, handle high-volume fluid transmission (e.g., water, gas) while maintaining ±10% tolerance for precise industrial installations.

  • 4. Versatile Scenario Solutions

    • Designed for commercial infrastructure projects, these pipes ensure reliability in extreme conditions such as construction sites, oil refineries, or water treatment systems.

  • 5. Certified Compliance Standards

    • Certified to API 5L Gr B and ASTM A53 standards, guaranteeing safety and performance for industrial use, surpassing basic compliance requirements for global projects.

Product details

API 5L Gr B 36 Inch Large Diameter Schedule 40 Spiral Welded Black Low Carbon Steel Pipes

API 5L Gr B 36-inch large diameter Schedule 40 spiral welded steel pipes are engineered for structural integrity and durability in demanding industrial applications. Designed with a black painted finish and non-alloy carbon steel, these pipes comply with global standards (ASTM, API 5L) to ensure reliability in corrosion-prone or high-pressure environments.

Technical specifications

FeatureSpecificationBenefit
MaterialNon-alloy carbon steel (Q235, Q345, etc.)Cost-effective strength for structural use
CoatingBlack painted or galvanizedEnhanced corrosion resistance and longevity
Diameter36 inches (914.4 mm)Large capacity for high-volume fluid transport
Wall ThicknessSchedule 40Optimized pressure tolerance for pipelines
Welding TechniqueSpiral submerged arc welding (SSAW)Seamless load distribution and durability
StandardsAPI 5L Gr B, ASTM A53M-2007, BS EN10219Global compliance for industrial projects
Tolerance±10%Flexible fitment in varied construction sites

Customization guide

Adjustable parameters include:

  • Coating Thickness: Tailored to meet specific corrosion or insulation requirements.
  • Wall Thickness: Customizable to match pressure demands (e.g., +20% for high-pressure systems).
  • Length/Dimensions: ±10% tolerance allows adaptation to project-specific needs.

Get inspired

With their spiral-welded construction and API 5L certification, these pipes are ideal for oil/gas pipelines, water distribution systems, or heavy infrastructure. The black painted finish ensures resistance to outdoor exposure, while the non-alloy steel balances cost and performance.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Corrosion ResistanceStandard coating+20% thicker coatingEpoxy + galvanized
Pressure Rating1400 psi1800 psi2200 psi
Temperature Range-20°C to 150°C-30°C to 200°C-40°C to 250°C
WeightStandard10% lighter15% lighter*

Supplier's note

  1. Technical Breakthroughs:

    • Spiral Welding: The SSAW technique reduces material waste by 15% compared to traditional methods, enabling cost-efficient large-diameter production.
    • Multi-Standard Compliance: API 5L Gr B certification ensures compatibility with global oil/gas projects, while ASTM A53M-2007 meets North American infrastructure needs.
    • Customizable Coatings: The Pro Model’s dual-layer epoxy-galvanized coating triples corrosion resistance versus bare steel, ideal for marine or chemical environments.

  2. Version Selection Guide:

    • Base Model: Optimal for general construction (e.g., water pipelines) where cost efficiency is prioritized.
    • Advanced Model: Suitable for corrosive environments (e.g., coastal regions) with moderate pressure demands.
    • Pro Model: Designed for extreme conditions (e.g., offshore oil platforms) requiring high-pressure tolerance and sub-zero operation.

With the Pro Model’s 2200 psi rating, you can safely transport high-pressure fluids like liquefied gases. Pair its corrosion-resistant coating with its low weight to reduce installation costs in remote locations.

Frequently asked questions

  • Which API 5L Gr B steel pipes are best for heavy industrial structural projects?

  • How do I maintain the coating of black painted steel pipes to prevent corrosion?

  • What’s the difference between non-alloy carbon steel and alloy steel pipes for structural use?

  • Can API 5L Gr B spiral welded pipes be customized for specific projects?

  • Are API 5L Gr B 36-inch pipes certified for oil & gas applications?

  • Why choose spiral welded over seamless pipes for large-diameter structural projects?

  • What coating options are available to enhance corrosion resistance in outdoor storage?

  • How does the Schedule 40 standard benefit structural pipe applications?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionStructural construction, pipelinesNon-alloy carbon steel (ASTM A53/A106) vs. API 5L Gr B (50,000 psi yield strength)Cost-effective base material ▲ Advanced: Enhanced corrosion resistance (Q345 grade, 55,000 psi yield strength)Base version lacks high-grade strength for extreme environments ▲ Advanced: Higher cost
Welding TechniqueHigh-pressure fluid transportSpiral Welded (SSAW) ▲ Industry: Longitudinal Welded (LW)Seamless-like integrity ▲ Advanced: Double submerged arc welding (SSAW) for 100% X-ray inspection complianceLW may have weaker joints ▲ Industry: Less durable under pressure fluctuations
Surface TreatmentCoastal/wet environmentsBare steel ▲ Base: Black painted ▲ Advanced: Hot-dip galvanized (ASTM A153)Base: Rust protection for 3 years ▲ Advanced: 25+ year corrosion resistance in saline conditionsBase: Limited durability in harsh chemicals ▲ Advanced: Adds 10% weight
Material GradeOil/gas infrastructureQ235 (235 MPa yield) ▲ Industry: A53 Grade A ▲ Advanced: Q345 (345 MPa)Base: Meets basic structural needs ▲ Advanced: Withstands 400°F+ temperatures and high-pressure surgesBase: Not suitable for seismic zones ▲ Industry: Lower fatigue resistance
Dimensional TolerancePrecision engineering projects±10% diameter tolerance (API 5L) ▲ Advanced: ±5% (ISO 3183)Industry-compliant ▲ Advanced: Fits tight-fitting flanges without reworkBase: Requires manual adjustments ▲ Advanced: 20% higher production cost
Certification StandardsGlobal compliance projectsASTM A53 ▲ Industry: BS EN 10219 ▲ Advanced: API 5L X65 + ASTM A106 B/CBase: Meets US/EU standards ▲ Advanced: Dual-certified for offshore/oilfield useBase: Limited to regional projects ▲ Advanced: Requires specialized testing

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