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Farsailmetal focuses on the production and sales of metal products. Including seamless steel pipe, steel plate, stainless steel, bearing and other products.We are like a sail roaming in the world of metal.It carries our hopes and dreams to reach distant places.
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PRODUCTS
Seamless Steel Pipe
Carbon seamless steel pipe
Welded Steel Pipe
Stainless Steel Products
Alloy Steel Pipe
Galvanized Steel Pipe
SquareRectangular & Special-Shaped Tubes
Anti-Corrosion Steel Pipe
​Pre-Insulated Steel Pipe
Piping Components

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OCTG – Casing Pipe

Product generic:
 Casing Pipe, Steel Casing Pipe, Oil Well Casing, OCTG Casing & Tubing, Seamless Casing, Oil Casing, API Casing, Well Casing, Casing
Application:
Used for oil casing and tubing in oil wells as well as sidewall
Specification:
OD:4 1/2″~20″(114.3~508mm);
WT: 5.21~16.13mm
LENGTH: R1(4.88~7.62m);R2(7.62~10.36m);R3(10.36~14.63m)
Standard & Grade:
API 5CT  PSL1/PSL2  J55,K55,N80-1,N80-Q,L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125
Thread:
NUE, EUE,  STC, LTC, BTC,Hydrill CS/Tenaris XC/VAM
Surface:
Anti-corrosion&water Based Paint

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  • ​Introduction
Oil casing is a critical tubular product used in oil and gas well drilling and completion. Its primary functions include supporting the wellbore, isolating formations with different pressures, preventing wellbore collapse, and ensuring safe hydrocarbon production.
  • ​Main Functions of Oil Casing 
Wellbore Support: Prevents formation collapse and maintains well stability;   ​
Zonal Isolation: Seals off different pressure zones (e.g., water, gas, oil layers);​
Protection for Tubing: Provides a secure conduit for production tubing;
Well Control: Prevents blowouts in high-pressure reservoirs.
  • ​Oil Casing Standards 
API 5CT (American Petroleum Institute);
ISO 11960 (International Organization for Standardization);
GB/T 19830 (Chinese National Standard).
  • ​Material & Performance 
H40, J55, K55 : Standard wells (low corrosion);
N80, L80, C90 : Medium-depth wells (moderate corrosion);
P110, Q125 : Deep/ultra-deep wells (high collapse resistance);
L80-13Cr : High CO₂/H₂S corrosive environments.
  • ​Manufacturing Process of Oil Casing​
Hot Rolling;   ​
Cold Rolling;  ​
Threading: API standard (NUE, EUE, STC, LTC, BTC) or premium connections (Hydril CS，Tenaris XC)
  • Specification of API Casing Steel Pipe


    
 	
  • Chemical compositions of casing pipe
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  • Mechanical properties of casing pipe
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  • Dimension Tolerance of casing pipe
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Trade Services
  1. Customized Solutions
    Based on industry experience and customer needs analysis, provide matching solution suggestions such as material selection (carbon steel/alloy steel/stainless steel), specification matching (wall thickness/pressure rating), and application scenario optimization (petroleum/chemical/nuclear power).
  2. Global Logistics
    Integrate the international logistics network (sea freight/air freight/land transportation), and provide a real-time cargo tracking system (GPS positioning + customs clearance progress).
  3. Inventory Optimization
    Based on industry data analysis, dynamically adjust inventory classification (material type/dimension/regional warehouse), implement Just-in-Time (JIT) supply chain management, and reduce the risk of slow sales.
  4. Compliance Certification
    Assist in providing international certification documents such as ISO, ASTM, API, etc., to ensure that products meet the access requirements of the target market.
  5. End-to-End Tracking
    Provide full life cycle services from order confirmation to after-sales support, and offer technical consultation for installation guidance throughout the whole process.
 
Processing Services
  1. Custom Cutting
    Support cutting by laser, plasma, sawing machine, and self-propelled cutting machine to meet different dimensional requirements (such as fixed length, multiple length), and provide bevel processing services.
  2. Forming
    Provide elbow bending, flaring, and necking processing.
  3. Surface Treatment
    Provide surface treatment methods such as pickling, phosphating, polishing, sandblasting, painting, coating, galvanizing, and buffing.
  4. Machining
    Provide threading, chamfering, and drilling processing.
 
Quality Inspection
      Provide third-party inspection reports (such as chemical composition analysis, mechanical properties, UT flaw detection) to ensure that products meet the standards.
                        

                    

                                    

                        

                            
Common standards for seamless carbon steel pipesCommon GradesApplication
ASTM A53Gr.A, Gr.BBlack and hot-dipped zinc-coated steel pipes welded and seamless
ASTM A106Gr.A, Gr.B, Gr.CSeamless carbon steel for high temperature service
ASTM SA179 SA179Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes
ASTM SA192SA192Seamless carbon steel boiler tubes for high pressure
ASTM SA210Gr.A1Seamless Medium-carbon boiler and superheater tubes
ASTM A333Gr.1(-50℃), Gr.6(-45℃，C-Mn)seamless and welded carbon and alloy steel pipe intended for use at low temperatures.
ASTM SA519 1020Seamless carbon for mechanical tubing
API Spec 5CT H40, J55, K55, L80, N80-1, C95, P110, Q125Seamless steel pipe for casing
API Spec 5LPSL1/PSL2  Gr.a,Gr.b, X42/52/60/65/70/80Seamless steel pipe for line pipe
DIN 17175St35.8Seamless steel tube for elevated temperture
DIN 2391St35, St52Cold drawn seamless prevision pipe
DIN 1629St37.0, St44.0, St52.0Seamless circular unalloyed steel tubes subject to special requirements
GB/T 8162-201810, 20, 35, 45Structural Seamless Steel Pipes
GB/T 8163-201810, 20Fluid Transportation Seamless Steel Pipes
GB 3087-200810, 20, 20GMedium & Low-Pressure Boiler Pipes
GB 5310-201720MnG, 25MnGHigh-Pressure Boiler Pipes
GB 6479-201310, 20, 20GHigh-Pressure Fertilizer Equipment Seamless Pipes
GB 9948-201310, 20Petroleum Cracking Seamless Pipes
GB/T 9711-2017L245 (Gr.b), L290 (X42), L360 (X52), L415 (X60), L450 (X65), L485 (X70), L555 (X80)Oil & Gas Pipeline Pipes
GB/T 19830-2017H40, J55, K55, L80, N80, C95, P110, Q125Oil Casing & Tubing
                        

                    

                            

        

    
		

				

				

				

			
		

				

				

				

					

				

				

				

					
				

						

					

			

						

				

			
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