API 5CT K55 Seamless Casing pipe
and tubing pipes used for oil wells in petroleum and natural gas industries.
In the oil boring, K55 API 5CT packaging or tubing is a generally regular sort.
Classification :
PRODUCT DETAILS
Product introduction
API 5CT K55 Casing Tubing serves to transport both crude oil and natural gas from oil and gas layer to the surface pipeline after drilling is completed. It is able to bear the pressure produced by the exploitation process. After the outer surface is coated with a protective layer, the tubing is marked in accordance with the API 5CT standard and strapped with metal belt.
Our oilfield tubing & API 5CT K55 Casing Tubing can be widely applicable to petroleum, construction, shipbuilding, smelting, aviation, electric power, food, paper, chemical industry, medical equipment, boilers, heat exchangers, metallurgy and so on.
Specfications
| API 5CT K55 Seamless Casing pipe | |
| Available Sizes | 2 3/8″, 2 7/8″ and 3 ½” Outer Diameter |
| Grades | J55, J55-FBNAU, N80, L80, P110 |
| Tubing | 1 1/4 “ – 2 1/16” Nom. |
| Standards | API SPEC 5CT |
| Model in Common Use | 2-3/8", 2-7/8", 3-1/2", 4", 4-1/2" |
| Length Range | R1(6.10-7.32m), R2(8.53-9.75m), R3(11.58-12.8m) |
| Steel Grade (Casing Grades, Tubing Grades) | J55, K55, N80-1, N80-Q, L80, P110 |
| Type of Screw Thread | Non upset threaded end(NUE), External upset threaded end(EUE) |
| Specialties |
Coating to customer specifications External upset Couplings – EUE, AB Modified, turned down, special clearance Pup Joints Heat treating Hydrostatic Testing Drifting (Full-length, or just ends) Full third-party inspection capabilities (EMI, SEA, and Weld Line) Threading |
| End Finishing | External Upset Ends (EUE), Flush Joint, PH6 (and equivalent connections), Integral Joint (IJ) |
Technical data
Chemical Composition
| Grade | Type | C | Mn | Mo | Cr | Ni max. | Cu max. | P max. | S max. | Si max. | ||||
| min. | max. | min. | max. | min. | max. | min. | max. | |||||||
| K55 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - |
Mechanical Properties
| API 5CT Casing Standard | Type | API 5CT Casing Tensile Strength MPa |
API 5CT Casing Yield Strength MPa |
API 5CT Casing Hardness Max. |
| API SPEC 5CT | K55 | ≥517 | ≥655 | --- |
Tensile & Hardness Requirement
| Grade | Type | Total elongation under load % | Yield strength MPa | Tensile strength min. MPa | Hardness a max. | Specified wall thickness mm |
Allowable hardness variation b HRC |
||
| min. | max . | HRC | HBW | ||||||
| K55 | - | 0.5 | 379 | 552 | 655 | - | - | - | - |
K55 Casing pipe Dimensions
| Pipe Casing Sizes, Oilfield Casing Sizes & Casing Drift Sizes | |
| Outer Diameter (Casing Pipe Sizes) | 4 1/2"-20", (114.3-508mm) |
| Standard Casing Sizes | 4 1/2"-20", (114.3-508mm) |
| Thread Type | Buttress thread casing, Long round thread casing, Short round thread casing |
| Function | It can protect the tubing pipe. |
Storage video
Factory appearance and appearance
The company mainly engaged in steel production, sales and other businesses. The main products include all kinds of steel plate, steel pipe, bar, profile and other materials and section steel. At the same time is a number of domestic large steel mill level agents, with a certain price advantage.

Packing and delivery
For many years, the company has been established, adhering to the purpose of "respecting contract, keeping faith, customer first, reputation first, quality first", adhering to the customer demand as the center, to "achieve what customers think, think what customers think" business philosophy, to "one sale, small profit, real price, timely delivery" business principle, we manage all kinds of specifications and materials of steel pipe and profile for customers.

Application field
The main supply fields are: aerospace, national defense equipment, military weapons, chemical industry, shipbuilding, nuclear energy, trains, containers, environmental protection, precision machining, auto parts, machinery, electronic products, molds, medical treatment Equipment, construction, decoration, etc.

Customer Visit Feedback
Over the years since its establishment, the company has been adhering to the purpose of "honoring contract, keeping faith, customer first, reputation first, quality first", adhering to the customer demand as the center, to "reach customer think, think customer think" business philosophy.

CERTIFICATE OF HONOR
WELCOME TO INQUIRE
The company guarantees the quality of its products with its strong financial strength, advanced management experience and strict quality control system for incoming goods. Excellent products and good reputation are well-known all over the country, and have won the trust and support of major steel mills and customers. Welcome to inquire, negotiate or visit our company in person. Welcome to inquire, negotiate or visit our company in person.
COOPERATIVE PARTNER
FAQ
Q1:Will you offer samples?
A:Yes. We will provide samples according to your needs and send them out within three days after receiving payment.
Q2 : What product information do I need to provide?
A : Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.
Q3 : It's my first time to import steel products, can you help me with it?
A : Sure,we have agent to arrange the shipment, we will do it together with you.
Q4:Do you have the products in stock?
A:We have the products in stock. Also, we can produce for your order.
Q5:Do you offer after-sales services?
A : Of course. We have a perfect after-sales service system, if you have any questions, please feel free to contact us. We will do it to your satisfaction.
Q6:What kind of work does your company do?
A:Our company is a professional manufacturer. We mainly produce stainless steel plate/coil/round rod, carbon steel plate/coil,galvanized plate/coil, PPGI coil, roofing sheet and so on.
Q7:What are the advantages of your company?
A : We have international advanced production equipment, large factory buildings, strong company strength, perfect products and reliable quality.
Q8 : Are you a factory or trading company?
A : We are a professional steel factory with many years of experience, perfect manufacturing process, quality assurance!
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