Products

API 5CT seamless casing and tubing from H40 through Q125, including sour-service grades (L80-1, C90, T95, C110), CO2 corrosion grades (L80-3Cr, L80-9Cr, L80-13Cr), medium-strength R95, and HPHT grades (P110, Q125). PSL-1 and PSL-2, BTC and premium connections, full MTC documentation.

Continuous-length steel coiled tubing for well intervention and completion operations in oil and gas wells, onshore and offshore. Supplied to API Spec 5ST (CT grades CT70–CT110, 483–758 MPa yield) and API Spec 5LCP (coiled line pipe X52C–X90C, 359–621 MPa yield). OD range 1"–3.5", wall thickness 1.905–6.35+ mm, maximum reel length 8000 m.

API 5CT and API 5B couplings connecting casing and tubing lengths in the well string. Manufactured in matching or superior grade to the connected pipe — H40 through Q125 including 13Cr variants. Available with phosphating, zinc plating, chrome plating, or epoxy coating surface treatment. Pup joints supplied in the same grade range.

API Spec 5DP drill pipe for oil and gas exploration and development wells, geothermal, and water wells. Grades E-75 through S-135, PSL-1/2/3. OD 2⅜"–6⅝", tool joints NC26 through 6⅝FH, EU/IU/IEU upset types. DPC, TC2000, and TK-34 series internal coatings and hard banding available.

API 5CT PSL-1 and PSL-2 electric resistance welded casing and tubing for non-sour oil and gas wells. Grades H40, J55, K55, N80, L80 Type 1, and P110 — ERW manufacturing is limited to non-CRA grades. OD 2⅞"–10¾", connections STC, LTC, BTC, EUE, and NUE. Cost-effective alternative to seamless pipe for sweet-service applications.

API 5CT tubing with factory-applied internal HDPE or EXPE (cross-linked polyethylene) liner for corrosion-resistant service. The liner provides H₂S and CO₂ chemical resistance and reduces rod-on-tubing wear in beam-pumped wells. Host pipe sizes, liner thickness, and resin grade are quoted per project requirements.

ZC-patented premium connections (ZC-1 through ZC-6) qualified to API 5C5 CAL IV. Metal-to-metal seal for gas-tight integrity in HPHT, deviated, sour service, and deep-well applications. Independent patents — not a licensed thread system.

Offshore drilling conductors and risers for isolating the wellbore from seawater during exploration and development drilling on jack-up, floater, and fixed platforms. Supplied to API 5L (Gr.B–X70) and API 5CT (K55) with quick-connect connectors — Single Circlip, Double Circlip, Single Threaded, and Four-start Threaded types. Pipe length typically 12 m with fast-connect design for rapid deployment.

Factory-applied FBE, 3LPE, and 3LPP anti-corrosion coating on API 5L line pipe. ISO 21809 qualified, 100% holiday tested. Internal FBE and project-specified cutback lengths available.

API 5L seamless line pipe X52–X80, PSL1 and PSL2. No weld seam. Sour service grades with HIC testing per NACE TM0284. FBE, 3LPE, and 3LPP coating available.

API 5L welded line pipe in ERW (2–24"), LSAW (16–60"), and SSAW (16–60"). Grades X52–X80, PSL1 and PSL2. LSAW is the standard for large-diameter high-pressure gas transmission and offshore pipelines.

ASTM A192, A210, A213, A335 grades for boilers, superheaters and high-temperature service.

Carbon and alloy steel tube for hydraulic cylinders, structural and machinery applications.

Cold-drawn seamless tube with tight OD/ID tolerances for hydraulics and instrumentation.

Friction-welded drill rod for horizontal directional drilling and geological exploration.

Austenitic, super austenitic, duplex, and ferritic grades. ASME SA312, SA789, EN 1016-5. OD 10–914 mm.

TP304–TP347H, duplex S31803/S32750, EN grades. OD 10–2500 mm. ASTM A312 / EN 10217-7.

Structural, shipbuilding, pipeline API 5L, and pressure vessel plate. EN 10025, ASTM A516, API 5L, GB/T 713. 6–220 mm.

DC01–DC06, bake-hardening CR140–300BH, HSLA HC260–420LA. 2.6 million tonne/year capacity.

Twin-roll cast strip 0.8–1.9 mm: Q235B/Q345B, HSLA 60–100, SPA-H. First commercial twin-roll line in Asia.

Hot-rolled wire rod for prestressed, cord, cold-heading, spring, and welding wire. Rebar HRB400–600, ASTM A615/A706.

Hot-induction and cold-formed pipe bends in carbon, alloy, and stainless steel with bend radius R from 3D to 10D. Unlike standard ASME B16.9 short- and long-radius elbows, pipe bends are produced with extended straight tangent lengths (300–1500 mm) and are specified by angle (15° through 180°) and bend radius to suit pipeline routing requirements. Available to ASME B16.9, DL/T 515, SY 5257, or customer drawing.

Butt-weld pipe end caps in carbon, alloy, and stainless steel manufactured to ASME B16.9. Caps seal the end of a pipe run and are used to blank off piping for pressure testing, system isolation, or permanent termination. Available from ½" through 48" in seamless construction and 26" through 72" in welded construction, with wall thickness from Sch 5 through XXS.

Butt-weld pipe elbows in carbon, alloy, and stainless steel manufactured to ASME B16.9 and ASME B16.28. Available in 45°, 90°, and 180° configurations; short-radius (1D) and long-radius (1.5D) from ½" through 24" seamless, and 4" through 72" in fabricated welded construction. Wall thickness from Sch 10 through XXS; maximum wall 120 mm.

Pipe flanges in carbon, stainless, and alloy steel manufactured to ASME B16.5 and ASME B16.47, covering NPS ½" through 60" across pressure Classes 150 through 2500. ZC supplies 14 flange types — from weld neck and blind flanges for high-pressure applications to slip-on, socket welding, and threaded flanges for lower-pressure systems — in raised face (RF), ring-type joint (RTJ), and flat face (FF) connection face configurations.

Concentric and eccentric butt-weld reducers in carbon, alloy, and stainless steel manufactured to ASME B16.9. Concentric reducers maintain a common centreline; eccentric reducers keep one side flat for draining or maintaining top-of-pipe alignment. Available from ½" through 24" seamless and 4" through 72" welded; wall thickness from Sch 10 through XXS, maximum 120 mm.

Butt-weld equal and reducing tees in carbon, alloy, and stainless steel manufactured to ASME B16.9. Equal tees provide full-bore branch connections; reducing tees join a branch of smaller NPS. Available from ½" through 24" seamless and up to 72" in welded construction, with wall thickness from Sch 5S through XXS.

Industrial valves in carbon, stainless, and alloy steel for oil & gas, petrochemical, power generation, and water treatment service. ZC supplies ball valves (floating and trunnion-mounted, 8 configurations), gate valves (API 6D slab and expanding, API 600 bolted bonnet, pressure seal), globe valves, check valves (swing, lift, wafer disc, nozzle), butterfly valves (centric to triple-eccentric), and specialty valves to API 6D, API 600, API 608, BS 5351, and ASME B16.34.