Wholesale API Threading Casing Coupling Manufacturer in China

In the rapidly evolving upstream sector, wholesale api threading casing coupling has become the gold standard for reliable pipe joints, ensuring safe and efficient oil & gas operations worldwide. This in-depth guide will take you through the latest technological trends, product parameters, manufacturing processes, and practical application cases—featuring the highly recommended Caing Coupling (wholesale api threading casing coupling).

1. Industry Overview & Trends

The global market for wholesale api threading casing coupling and wholesale finished casing coupling is projected to reach USD 1.3 billion by 2027 (Grand View Research 2023). With the rise in energy exploration and increasingly challenging environments (deepwater, high-pressure, high-temperature wells), demand for wholesale l80 casing coupling and advanced thread designs is surging.

• Strong shift towards premium alloys (L80, P110, J55) for anti-corrosion, sour service, and tight sealing.
• Emphasis on ISO 13679 CAL IV performance, ensuring casing coupling china manufacturer products match or exceed API 5CT standards.
• Customization (thread type, coating, dimensions) is now a key purchasing factor.
• China’s manufacturers lead global coupling casing supply chains via volume, cost advantage, and rapid design iterations.

2. Product Specification Table

3. Manufacturing Process Breakdown

Wholesale api threading casing coupling manufacturing involves multiple precision stages. Below is a typical workflow for Caing Coupling:

1. Material Selection: Alloy steels (e.g., L80, J55, P110) based on strict chemical composition controls.
2. Forging: Billets are heated to 1100°C+, forged into casing blank shapes; forging ensures grain refinement for strength and impact resistance.
3. CNC Machining: State-of-the-art CNC lathes cut precise API/LTC/BTC threads (tolerance ±0.02mm), meeting API 5CT repeatability standards.
4. Heat Treatment: Normalize/quench/temper cycles boost toughness and fatigue life; sample test data:
   
   • L80 casing: 655 N/mm² yield strength (API min 552 N/mm²), hardness 217 HB
   • Typical elongation: 16-20%
5. Surface Treatment: Options include phosphate coating, copper plating, epoxy for anti-corrosion (ISO 14713 compliance).
6. Inspection: 100% non-destructive testing (NDT): thread gauge check, ultrasonic scan, hydro/static pressure test.

4. Technical Advantages & Parameter Trends

• Material Science: L80/P110 chromium alloys for sour, high-CO2/H2S wells; K55 lower cost for shallow application.
• Precision Threading: API BTC, LTC, SC threads ensure tight seal, CYCLICS leak rate < 1x10^-5 cc/s.
• Corrosion Resistance: Additives such as Mo, Ni extend service life (up to 15-20 years).
• Customization: Length, diameter, thread profile to suit onshore, offshore, geothermal, shale gas projects.
• Certification: All major suppliers certified under API 5CT, ISO 9001/14001, China GB/T9711; ensures global trust.

Below: Wholesale api threading casing coupling technical parameter trend comparison, showing continuing improvement in tensile strength, corrosion protection, and service reliability.

5. Manufacturer Comparison Table

6. Customization & Delivery Options

• Thread Types: API BTC, LTC, STC, Premium (Vam, Hydril). Custom OEM on request; precise CNC cut.
• Materials: J55, K55, L80, P110, Q125, 13Cr, C95, N80; selection based on well conditions.
• Coating/Finish: Bare, Phosphated, Copper plated, Epoxy coated (ISO 14713 conformity).
• Packing: Palletized, steel cage, export polywrap/wood case.
• MOQ: 300-500pcs; Lead time: 25~35 days standard, 10-15 days rapid ship for in-stock items.
• Warranty: 24-month quality guarantee, lifetime consultation/support

Visit product page for direct wholesale api threading casing coupling customization.

7. Caing Coupling Technical Parameter Overview

8. Application Scenarios

• Oil & Gas Wells: Onshore/offshore casing pipe joints, high-pressure/high-temperature, ultra-deep well usage
• Geothermal Drilling: Handles corrosion, high temperatures, thermal cycling
• Petrochemical Plants: Corrosive flow pipelines, high-reliability jointing
• Municipal Water: Long-life, leak-proof, compliance with international potable water standards
• Mining & Metallurgy: Structural support, slurry pipelines, harsh environments
• Shale Gas/Fracking: Fast install, anti-failure under extreme cycling

9. Professional FAQ on Wholesale API Threading Casing Coupling

• Q1: What is the most common material for wholesale api threading casing coupling?
  A: L80, J55, and P110 grade alloy steels are most prevalent. L80 resists sour gas; J55 is cost-efficient for shallow wells.
• Q2: How are API thread types like BTC, LTC, STC different?
  A: BTC (Buttress): strong, robust for oil/gas. LTC: long thread for tight seal. STC: short thread, fast connect.
• Q3: Which certifications are required for casing couplings?
  A: API 5CT is mandatory. Leading Chinese manufacturers also comply with ISO 9001 and ISO 14001. Caing Coupling carries all major certifications.
• Q4: Can coupling length and diameter be customized?
  A: Yes. Caing Coupling offers custom OD (108–244.5mm) and length (170–270mm), matching project requirements.
• Q5: What testing is performed before shipping?
  A: Each coupling undergoes thread gauge, hydro pressure, NDT (ultrasonic/magnetic particle test), and API 5CT visual checks.
• Q6: What is the estimated delivery cycle?
  A: Standard is 25–35 days for bulk, 10–15 days for spot stock. Custom specs/large orders may vary, contractually guaranteed.
• Q7: How is corrosion resistance ensured?
  A: Multi-layer coatings (phosphating, copper, epoxy), controlled humidity storage, and advanced alloys (e.g., Cr13, 9Cr) guarantee top-level anti-corrosion even in brine/sour fields.

10. Why Choose Caing Coupling (WJ Petroleum)?

• 25 years+ specialized manufacturing experience; global distribution to 70+ countries
• Recognized API 5CT, ISO, GOST, CE certifications (see API Q1 registry)
• OEM/ODM, rapid prototyping, full QC documentation, industry traceability
• Endorsed by top EPCs: Sinopec, ADNOC, Shell, Lukoil, CNPC
• 24/7 technical service, lifetime product support, 24 months comprehensive warranty

Wholesale finished casing coupling and coupling casing needs? Get a quote today at Caing Coupling.

References & Industry Insight

• “API 5CT Casing and Tubing Standards Overview” – American Petroleum Institute
• “Oil & Gas Threaded Connections: Risks and Trends” – Industrial & Engineering Chemistry Research
• “Advances in Corrosion-Resistant Coupling Alloys” – NACE International
• “Global Oilfield Thread Protector Market Size Report, 2023-2030” – Grand View Research
• “Caing Coupling by WJ Petroleum” – Official Website