API TR 5C3 High Collapse Casing
Supplier from Turkey
N80 HC, L80 HC, P110 HC, and Q125 HC casing for demanding downhole environments. Sourced from API 5CT-certified partner mills with independent inspection and consolidated export documentation.
High Collapse Casing Grades
HC casing delivers 20–50% higher collapse resistance than standard API TR 5C3 values through tighter dimensional tolerances and enhanced heat treatment control.
N80 High Collapse
General-purpose HC grade with +20–30% collapse improvement. Suitable for intermediate casing strings in wells with moderate external pressure.
L80 High Collapse
Primary sour service HC grade. 23 HRC hardness ceiling satisfies ISO 15156 / NACE MR0175 for H₂S environments. CRA variants available on request.
P110 High Collapse
Most commonly specified HC grade for intermediate and production casing strings. +25–40% collapse improvement over standard API TR 5C3 values.
Q125 High Collapse
Highest performance HC tier targeting the deepest, highest-pressure wells. +30–50% collapse improvement. Enhanced handling and testing requirements.
HC Casing Specifications
All mechanical properties are minimums per API 5CT. HC enhancement percentages are typical manufacturer-guaranteed improvements over standard API TR 5C3 values.
| Grade | Yield Strength (MPa) | Tensile Strength (min, MPa) | Max Hardness | HC Collapse Improvement |
|---|---|---|---|---|
| N80 HC | 552–758 | 689 | — | +20–30% over standard |
| L80 HC | 552–655 | 655 | 23 HRC | +20–35% over standard |
| P110 HC | 758–965 | 862 | — | +25–40% over standard |
| Q125 HC | 862–1,034 | 931 | — | +30–50% over standard |
Standard vs HC Collapse Performance (Reference)
| Size (OD × WT) | Grade | Standard Collapse (MPa) | HC Collapse (MPa) | Improvement |
|---|---|---|---|---|
| 139.7 × 9.17 mm | N80 | 76.6 | 92.5 | +21% |
| 177.8 × 10.36 mm | P110 | 58.8 | 70.9 | +21% |
| 177.8 × 12.65 mm | P110 | 89.9 | 108.7 | +21% |
| 193.68 × 12.70 mm | P110 | 76.4 | 92.3 | +21% |
| 244.5 × 11.99 mm | L80 | ~38.5 | ~53.0 | +38% |
HC Procurement Highlights
- HC casing is produced with tighter OD and WT tolerances than standard API 5CT (standard WT tolerance: -12.5%).
- L80 HC is the primary sour service HC grade — 23 HRC max hardness per ISO 15156 / NACE MR0175.
- CRA variants (L80 9Cr, L80 13Cr) with HC performance available at RFQ stage.
- For standard wells <2,000 m with moderate formation pressures, standard collapse ratings may be sufficient — HC is not always required.
Need High Collapse
Casing from Turkey?
Send your HC grade and size requirement. Receive a quotation with feasibility, lead time, and inspection scope.
Why Source HC Casing via MetalFromTurkey
Independent sourcing partner with multi-mill access, benchmarked pricing, and inspection-first workflow for high collapse casing.
Multi-Mill HC Availability
Our partner mill network reduces single-source bottleneck risk for HC casing in less common sizes and grades. Feasibility confirmed before commercial offer.
Independent Quality Control
QC scope includes full-body UT, HC tolerance verification, drift mandrel test, and hydrostatic test per API 5CT — documented before dispatch.
Benchmarked Pricing
Quotations are benchmarked across our mill network for the best combination of price, lead time, and quality assurance.
Regional Logistics
Door-to-door delivery to Middle East, EU, North Africa, and Central Asia. Transit: 7–15 days. EXW, FOB, CFR, and CIF supported.
Quality Assurance & Testing
Every HC casing lot ships with traceable documentation per API 5CT.
HC casing is not a separate standard — it is a performance tier within API 5CT manufacturing. We verify HC tolerance compliance independently before dispatch.
Energy Products Team — MetalFromTurkeyWhere HC Casing Is Specified
HC casing is specified when standard API TR 5C3 collapse ratings are insufficient for the well design.
Deep Wells & High Pressure
Wells exceeding 3,000 m where formation pressures exceed standard collapse ratings. HC preserves bore availability without upsizing wall thickness.
Salt & Creep Formations
Salt formations apply time-dependent, non-uniform external loading. HC casing compensates for additional loading and geometry uncertainty.
Offshore & Directional Drilling
Deepwater design codes specify higher safety factors (1.125–1.25). HC casing satisfies stricter collapse envelopes with bending-induced stresses.
Sour Service Wells (H₂S)
L80 HC with 23 HRC ceiling for sour environments per ISO 15156 / NACE MR0175. CRA variants available on request.
How to Order HC Casing in 4 Steps
For a clean RFQ, specify: grade(s), OD × WT, connection type, PSL level, quantity, and destination.
Send RFQ
Share grade(s), OD × WT, connection type, PSL level, quantity, and destination. Include sour service designation if applicable.
Feasibility & Offer
Grade feasibility is confirmed with partner mills. Receive quotation with lead time, incoterms, and inspection scope.
Production & Inspection
HC casing is produced with tighter tolerances. Independent inspection verifies HC compliance before dispatch.
Shipment & Delivery
Cargo dispatched with MTC and export documentation for customs clearance. Door-to-door coordination available.
Common Questions
What is API TR 5C3 high collapse casing?
HC casing exceeds standard collapse resistance values from API TR 5C3 through tighter dimensional tolerances (wall thickness, ovality) and enhanced heat treatment. It is specified for wells where external pressure exceeds standard API 5CT collapse ratings.
What grades are available in high collapse casing?
N80 HC, L80 HC, P110 HC, and Q125 HC. CRA variants (L80 9Cr, L80 13Cr) with HC performance can be evaluated for corrosive environments. Grade selection depends on depth, pressure, and fluid chemistry.
What is the difference between API TR 5C3 and API 5CT?
API 5CT is the manufacturing specification — grades, testing, threading, marking. API TR 5C3 (now API RP 5C3) defines how to calculate collapse, burst, and tensile performance. API 5CT tells you how to make the pipe; API TR 5C3 predicts its performance under load.
Can high collapse casing be used in sour service (H₂S)?
Yes. L80 HC satisfies the 23 HRC max hardness ceiling per ISO 15156 / NACE MR0175. Sour service requirements (H₂S partial pressure, temperature, pH) must be specified at RFQ stage.
What is the MOQ and lead time for high collapse casing?
MOQ is 5 metric tons. Stock items ship within 5–10 business days. Production orders: 4–8 weeks depending on grade, size, and threading.
What are API dimensional tolerances for HC casing?
Per API 5CT, standard wall thickness tolerance is -12.5% (minimum). HC production maintains a narrower window to achieve collapse values above standard API TR 5C3 calculations.
Request a Quote for
High Collapse Casing
Share your HC casing requirements and receive a detailed offer with grade feasibility, lead time, and logistics options.