Essential details
Shipping:Ocean freight
Specification Number:API5CT-COUPLING
Product Introduction
API 5CT CASING COUPLING
Sizes: 2-7/8" to 9-5/8"
Our API 5CT Casing Couplings are precision-manufactured cylindrical steel connectors designed to join API 5CT casing joints into continuous, pressure-sealed casing strings.
Available in 8 standard sizes from 2-7/8" to 9-5/8", with full STC, LTC, and BTC thread configurations as well as
premium connections , our couplings serve wells from shallow surface strings to ultra-deep HPHT reservoirs at 8,000+ meters.
Available in 8 standard sizes from 2-7/8" to 9-5/8", with full STC, LTC, and BTC thread configurations as well as
premium connections , our couplings serve wells from shallow surface strings to ultra-deep HPHT reservoirs at 8,000+ meters.
TECHNICAL SPECIFICATIONS
Standards: API 5CT / API 5B / ISO 11960
Steel Grades: J55, K55, N80, N80Q, L80, L80-13Cr, C90, T95, P110, Q125
Thread Types: STC / LTC / BTC /
Steel Grades: J55, K55, N80, N80Q, L80, L80-13Cr, C90, T95, P110, Q125
Thread Types: STC / LTC / BTC /
QUALITY ASSURANCE
• API 5CT Monogram Licensed Manufacturer
• 100% API 5B Thread Gauge Inspection (GO/NO-GO)
• Ultrasonic Testing (UT) for wall integrity
• Magnetic Particle Testing (MT) for surface defects
• Hardness verification per grade specification
• Mill Test Report EN 10204 3.1 / 3.2 per shipment
• Chemical composition (PMI) verification
• Third-party inspection available (SGS, BV, DNV)
• 100% API 5B Thread Gauge Inspection (GO/NO-GO)
• Ultrasonic Testing (UT) for wall integrity
• Magnetic Particle Testing (MT) for surface defects
• Hardness verification per grade specification
• Mill Test Report EN 10204 3.1 / 3.2 per shipment
• Chemical composition (PMI) verification
• Third-party inspection available (SGS, BV, DNV)
SURFACE PROTECTION
• Black anti-rust varnish (standard)
• VCI (Vapor Corrosion Inhibitor) film for export
• Dacromet / galvanizing on request
• VCI (Vapor Corrosion Inhibitor) film for export
• Dacromet / galvanizing on request
PACKAGING
• Steel strip bundles with wooden pallets
• Individual thread protectors on each coupling
• Waterproof wrapping + sea-worthy crating
• Custom marking: size, grade, thread type, heat no., API monogram
• Individual thread protectors on each coupling
• Waterproof wrapping + sea-worthy crating
• Custom marking: size, grade, thread type, heat no., API monogram
DELIVERY TERMS: EX-WORKS/FOB / CFR / CIF
SUPPLY CAPACITY: 15,000 – 20,000 pcs/month
MOQ: 1 PCS
LEAD TIME: ready to ship for in-stock sizes /10–25 days for custom orders
PORT OF SHIPMENT: Tianjin / Qingdao / Shanghai (negotiable)
SUPPLY CAPACITY: 15,000 – 20,000 pcs/month
MOQ: 1 PCS
LEAD TIME: ready to ship for in-stock sizes /10–25 days for custom orders
PORT OF SHIPMENT: Tianjin / Qingdao / Shanghai (negotiable)
WHY CHOOSE US?
✓ Full-size range: 2-7/8" to 9-5/8" — all 8 sizes available
✓ API 5CT certified factory (monogram verifiable online)
✓ Export experience: Middle East,North Africa, Asia etc.
✓ Full OCTG range: casing + tubing + couplings + accessories
✓ Professional documentation: MTC, CI, PL, COO, B/L
✓ API 5CT certified factory (monogram verifiable online)
✓ Export experience: Middle East,North Africa, Asia etc.
✓ Full OCTG range: casing + tubing + couplings + accessories
✓ Professional documentation: MTC, CI, PL, COO, B/L