Zhong Neng Steel Union(Qingdao)Heavy Industry Co.,Ltd
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| Type | carbon steel pipe / tube | |
| Materials | API 5L /A53 /A106 GRADE B and other material which client inquired | |
| Size | Outer Diameter | Seamless:17-914mm 3/8"-36" |
| Wall Thickness | SCH10 SCH20 SCH30 STD SCH40 SCH60 XS SCH80 | |
| SCH100 SCH120 SCH140 SCH160 XXS | ||
| Length | Single random length/Double random length | |
| 5m-14m,5.8m,6m,10m-12m,12m or as customer's actual request | ||
| Ends | Plain end/Beveled,protected by plastic caps on both ends, cut quare,grooved,threaded and coupling,etc. | |
| Surface Treatment | Bare,Painting black,varnished,galvanized,anti-corrosion 3PE PP/EP/FBE coating | |
| Technical Methods | Hot-rolled/Cold-drawn/Hot-expanded | |
| Testing Methods | Pressure test,Flaw detection,Eddy current testing, Hydro static testing or Ultrasonic examination and also with chemical and physical property inspection | |
| Packaging | Small pipes in bundles with strong steel strips,large pieces in loose; Covered with plastic woven bags; Wooden cases; Suitable for lifting operation; Loaded in 20ft 40ft or 45ft container or in bulk; Also according to customer's requests | |
| Origin | China | |
| Application | Conveying oil gas and water | |
| Third Party Inspection | SGS BV MTC | |
| Trade Terms | FOB CIF CFR | |
| Payment Terms | FOB 30%T/T, 70% before shipment | |
| CIF 30% pre-payment and the balance to be paid before making shipment or | ||
| Irrevocable 100% L/C at sight | ||
| MOQ | 10 tons | |
| Supply Capacity | 5000 T/M | |
| Delivery Time | Usually within 10-45 days after receipt of advance payment | |
Chemical compositions of casing pipe
| Standard | Grade | Chemical compositions(%) | |||||||||
| API SPEC 5CT | J55 | C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V |
| K55 | 0.34~0.39 | 0.20~0.35 | 1.25~1.50 | ≤0.020 | ≤0.015 | ≤0.15 | ≤0.20 | ≤0.20 | / | / | |
| N80 | 0.34~0.38 | 0.20~0.35 | 1.45~1.70 | ≤0.020 | ≤0.015 | ≤0.15 | / | / | / | 0.11~0.16 | |
| Q125 | ≤0.35 | ------------- | ≤1.35 | ≤0.020 | ≤0.010 | ≤1.50 | ≤0.20 | ≤0.20 | / | / | |
| P110 | 0.26~0.395 | 0.17~0.37 | 0.40~0.70 | ≤0.020 | ≤0.010 | 0.80~1.10 | ≤0.20 | ≤0.20 | 0.15~0.25 | ≤0.08 | |
| Grade | Type | Total elongation under load (%) | Yield strength (min)Mpa | Yield strength (max)Mpa | Tensile strength min Mpa | Hardness Max (HRC) | Hardness Max (HBW) |
| J55 | - | 0.5 | 379 | 552 | 517 | - | - |
| K55 | - | 0.5 | 379 | 552 | 655 | - | - |
| N80 | 1 | 0.5 | 552 | 758 | 689 | - | - |
| N80 | Q | 0.5 | 552 | 758 | 689 | - | - |
| L80 | 1 | 0.5 | 552 | 655 | 655 | 23 | 241 |
| L80 | 9Cr | 0.5 | 552 | 655 | 655 | 23 | 241 |
| L80 | 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 |
| C90 | - | 0.5 | 621 | 724 | 689 | 25.4 | 255 |
| C95 | - | 0.5 | 655 | 758 | 724 | - | - |
| T95 | - | 0.5 | 655 | 758 | 724 | 25.4 | 255 |
| P110 | - | 0.6 | 758 | 965 | 862 | - | - |
| Q125 | All | 0.65 | 862 | 1034 | 931 | - | - |
Casing Pipe Manufacturing Process:
Steel ingot heating → hydraulic punching → reheating → extension → periodic rolling → reheating → sizing → cooling → straightening → pipe cutting → inspection
1. An annular heating furnace is required for ingot heating;
2. Punching and reheating with hydraulic press;
3. The oil casing plant uses a two-roller guide plate extension machine for extension;
4. Re-use a disc heating furnace for periodic rolling, and use a non-entry furnace for reheating, cooling, straightening, pipe cutting, and inspection.