Engineering
Technical capabilities and segment coverage.
Business Segments
Business Segment I - Markets That Accept China Origin
| Product Category | Standards | Common Applications |
|---|---|---|
| OCTG Casing & Tubing | API 5CT / API 5B | Drilling, completion, production & workover |
| Mechanical / Structural | GB / ASTM / EN | Offshore structures, equipment fabrication, load-bearing |
| Line Pipe | API 5L / ISO 3183 | Oil & gas gathering and transmission |
Strategic Mill Partners
Baotou • Hengyang Valin • Dalipal • Fengbao • TPCO
- Reliable production capacity & controlled delivery
- Full steel grade & specification coverage
- Strong QA documentation & certifications
- Superior landed cost competitiveness
Business Segment II - Origin-Compliant via Southeast Asia
Upgradable mother pipes (East Asia) • Heat treatment & premium threading (SEA) • SEA COO • Compliant entry into restricted markets.
| Process | Technical Capability |
|---|---|
| Heat Treatment (Q&T / Normalize / SR) | Controls strength, toughness, fatigue & corrosion resistance |
| Premium Connection Threading | PL-series, PH-series, compatible metal-to-metal seals |
| Inspection & Validation | NDT/EMI, torque & seal testing, hydrostatic; 3rd-party witnessable |
| Traceability & Dossier | Material origin • processing logs • QA data • COO • shipping dossier |
Our Products
OCTG
PL6 & PL8 Premium Connection
The PL Two-Step Integral Premium Connection (PL-6 / PL-8) is engineered for reliable makeup, field-service efficiency, and high-performance downhole integrity. Featuring a metal-to-metal gas-tight seal and a low-stress thread profile, the PL-6/8 minimizes galling risk while delivering full 100% ratings in tension, compression, and both internal and external pressure.
This connection is particularly suited for unconventional applications requiring post-fracturing clean-out or drilling through cement and debris. It provides superior seal reliability and structural toughness in deep, high-pressure gas wells, high-intensity fracturing operations, and long-term production strings.
Additionally, we can supply custom extended upset lengths, enabling multiple re-cuts (up to two re-head operations) for extended service life — delivering greater operational flexibility and lower cost per well over the full lifecycle.
The PL system is available in two sizes — PL-6 and PL-8 — offering proven performance across a wide range of completion and production environments.
Performance & Design Highlights
| Feature | PL-6 / PL-8 Advantage |
|---|---|
| Thread Form | Two-step integral, low-stress, galling-resistant |
| Seal Type | Metal-to-metal, gas-tight seal |
| Ratings | 100% tension / compression / internal & external pressure |
| Field Handling | Simple make-up, repeatable sealing, low galling risk |
| Best Use Cases | HP gas wells, frac programs, debris & cement drill-outs |
Technical Data Sheets
OCTG - Casing, Tubing & Accessories
- Product: Oil Country Tubular Goods (OCTG)
- Standard: API 5CT
- Connections: API (STC/LTC/BTC) & Premium (PL-6/PL-8)
- Dimensions: 1/2" - 24"
- Lengths: Single Random (4-7m) and Double Random (8-14m)
- Grades Available: J55, K55, L80-1, N80, N80Q, C90, T95, P110, Q125
- Surface: Mill varnish / Black
- Certification: 3.1 per EN 10204
Linepipe/Mechanical structure pipe
Seamless Carbon Steel Linepipe
- Product: Seamless carbon steel tubes for process and linepipe
- Standard: API 5L, ASTM A106, EN10216, ASTM A333 (low temp)
- Dimensions: 1/2" - 24"
- Lengths: Single (4-7m) and Double Random (8-14m)
- Delivery Condition: Bevelled ends for O.D. > 60.3 mm
- Materials: Gr. B, X52, A106 Gr. C, P265GH, Gr. 6 LT45, P355 (low temp)
- Surface: Mill varnish
- Certification: 3.1 per EN 10204
Seamless Carbon Steel Tubes (Mechanical / Structural / Pressure)
- Product: Seamless carbon steel tubes for mechanical engineering, construction & pressure service
- Standards: EN 10297-1, EN 10210-1/2, EN 10216-1/3
- Dimensions: 10.2 – 1.6 mm • 660 – 100 mm
- Lengths: Single (4-7m), Double Random (8-14m)
- Materials: P355N TC1, S355J2H, E355 N
- Surface: Black, non-oiled
- Certification: 3.1 per EN 10204
Seamless stainless pipe
Seamless Stainless Round Tubes - Cold Finished
- Product: Seamless stainless round tubes, cold-finished
- Standards: ASTM/ASME A/SA213, ASTM A269, EN 10216-5 TC1/TC2
- Dimensions: 6.35 – 0.89 mm • 139.7 – 4 mm (other on request)
- Lengths: 5-7m (custom fixed lengths available)
- Delivery: Bright annealed / Annealed & Pickled / Polished (Grit 240)
- Material Nos.: 1.4301/1.4307, 1.4401/1.4404, 1.4541, 1.4571
- Equivalent Grades: TP304/304L, TP316/316L, TP321, TP316Ti
- Certification: 3.1 or 3.2 per EN 10204
- Origin: EU & Non-EU
Seamless Stainless Round Tubes - Hot Finished
- Product: Seamless stainless round tubes, hot-finished
- Standards: ASTM A312 / ASME SA269 / EN 10216-5 TC1/TC2
- Dimensions: 33.4 – 6.35 mm • 323.9 – 9.52 mm (other sizes on request)
- Lengths: 5-7m (special lengths optional)
- Delivery: Hot-finished, annealed & pickled
- Material Nos.: 1.4301/1.407, 1.4401/1.4404, 1.4541, 1.4571
- Equivalent Grades: TP304/304L, TP316/316L, TP321, TP316Ti
- Certification: 3.1 or 3.2 per EN 10204
- Origin: EU & Non-EU