Seamless Casing Steel Pipe 2

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1. Seamless Casing Steel Pipe Specifications

1) Grade:H-40,J-55,K-55,N-80,C-75,L-80,C-90,C-95,P-110,Q-125

2) Size: 4 1/2", 5", 5 1/2", 6 5/8", 7", 7 5/8", 9 5/8", 10 3/4", 13 3/8", 16", 18 5/8", 20"

3) Wall thickness: 5.11 - 16.13 mm

4) Clasp Type : STC, LTC, BTC

5) Length : R1,R2,R3

6) Products comply with API SPEC 5CT standards, and use for API 5CT emblem

2. Round thread casing coupling size quality and tolerance:

Code	Specification	Diameter W /mm	Min Length		Boring diameter /mm	Width of bearing surferingb/mm	Weight
	Diameter D /mm		Short coupling Nl	Coupling length Nl			short couping	Coupling length
4-1/2	114.30	127.00	158.75	177.80	116.68	3.97	3.62	4.15
5	127.00	141.30	165.10	196.85	129.38	4.76	4.66	5.75
5-1/2	139.70	153.67	171.45	203.20	142.08	3.18	5.23	6.42
6-5/8	168.26	187.71	184.15	222.25	170.66	6.35	9.12	11.34
7	177.80	194.46	184.15	228.60	180.18	4.76	8.39	10.83
7-5/8	193.70	215.90	190.50	234.95	197.64	5.56	12.30	15.63
8-5/8	219.08	244.48	196.85	254.00	223.04	6.35	16.23	21.67
9-5/8	244.48	269.88	196.85	266.70	248.44	6.35	18.03	25.45
10-3/4	273.05	298.45	203.20	---	277.02	6.35	20.78	---
11-3/4	298.45	323.85	203.20	---	302.42	6.35	22.64	---
13-3/8	339.72	365.12	203.20	---	343.69	5.56	25.66	---

Chemical composition:

Standard codes	Models of steel tubes	Chemical compositions
		C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V	Als
API SPEC 5CT	J55K55 (37Mn5)	0.340.39	0.200.35	1.251.50	≤0.020	≤0.015	≤0.15	≤0.20	≤0.20	≤0.020
	N80 (36 Mn2V)	0.340.38	0.200.35	1.451.70	≤0.020	≤0.015	≤0.15	0.110.16	≤0.020
	L80(13Cr)	0.150.22	≤1.00	0.251.00	≤0.020	≤0.010	12.014.0	≤0.20	≤0.20	≤0.020
	P110 (30CrMo)	0.260.35	0.170.37	0.400.70	≤0.020	≤0.010	0.801.10	≤0.20	≤0.20	0.150.25	≤0.08	≤0.0

Standard codes

Models of steel tubes

Chemical compositions

Als

API SPEC 5CT

J55K55
(37Mn5)

0.340.39

0.200.35

1.251.50

≤0.020

≤0.015

≤0.15

≤0.20

≤0.020

N80
(36 Mn2V)

0.340.38

0.200.35

1.451.70

≤0.020

≤0.015

≤0.15

0.110.16

≤0.020

L80(13Cr)

0.150.22

≤1.00

0.251.00

≤0.020

≤0.010

12.014.0

≤0.20

≤0.020

P110
(30CrMo)

0.260.35

0.170.37

0.400.70

≤0.020

≤0.010

0.801.10

≤0.20

0.150.25

≤0.08

≤0.0

3. FAQ of Seamless Casing Steel Pipe:

①How is the quality of your products?
Our products are manufactured strictly according to national and internaional standard, and we take a test on every pipe before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.
Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.

②How about price?
Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,if you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.

③Why should you chose us?
Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.

Any question, pls feel free to contact us !

4、Seamless Casing Steel Pipe Images：

Seamless Casing Steel Pipe 2

Q: How are steel pipes cleaned and maintained?: Steel pipes are commonly cleaned and maintained through a variety of methods. Firstly, they are often cleaned using chemical solvents or detergents to remove any dirt, debris, or rust. This process is followed by rinsing the pipes thoroughly with water. Additionally, periodic inspections are conducted to identify any signs of corrosion or damage, which are then repaired promptly to prevent further deterioration. Lastly, applying protective coatings or paints on the pipes can help to enhance their longevity and prevent future corrosion.

Q: Are steel pipes suitable for underground drainage systems?: Indeed, steel pipes prove to be a fitting choice for underground drainage systems. The multitude of qualities possessed by steel pipes contributes to their popularity in this field. Firstly, their robustness and endurance enable them to withstand high levels of pressure and heavy loads. Moreover, steel pipes are resistant to corrosion, which prolongs their lifespan and reduces the need for frequent maintenance or replacement. Furthermore, steel pipes possess the advantage of adaptability and versatility in various soil conditions. They can be easily customized to match the specific requirements of the drainage system, encompassing different diameters and lengths. Additionally, steel pipes can be welded together, ensuring a secure and tight connection that effectively prevents leakage and the infiltration of groundwater. Another benefit of utilizing steel pipes in underground drainage systems lies in their capability to handle a wide range of temperatures. Their resistance to extreme heat or cold renders them suitable for diverse climates and environments. Nevertheless, it is important to acknowledge that steel pipes can be more costly compared to alternative materials such as PVC or HDPE pipes. Additionally, their weight and installation process may pose challenges, necessitating specialized equipment and expertise. In conclusion, steel pipes provide a dependable and long-lasting solution for underground drainage systems, particularly in regions where durability and strength are vital considerations.

Q: How do you calculate the pipe pressure drop coefficient for steel pipes?: To calculate the pipe pressure drop coefficient for steel pipes, you can use the Darcy-Weisbach equation. This equation relates the pressure drop in a pipe to various factors such as the flow rate, pipe diameter, pipe length, and the properties of the fluid being transported. The pressure drop coefficient, also known as the friction factor or the Darcy-Weisbach friction factor, is denoted by the symbol f. It is a dimensionless parameter that represents the resistance to flow in the pipe. The value of f depends on the flow regime, which can be laminar or turbulent. For laminar flow, which occurs at low flow rates or with viscous fluids, the pressure drop coefficient can be calculated using the Hagen-Poiseuille equation. This equation relates the pressure drop to the fluid viscosity, pipe length, pipe diameter, and flow rate. However, for turbulent flow, which occurs at higher flow rates, the calculation of the pressure drop coefficient is more complex. It depends on the roughness of the pipe wall, which affects the flow resistance. The roughness is typically quantified using the relative roughness, which is the ratio of the pipe wall roughness to the pipe diameter. To calculate the pressure drop coefficient for turbulent flow in steel pipes, you can use empirical correlations or Moody's diagram. Moody's diagram provides a graphical representation of the friction factor as a function of the Reynolds number and the relative roughness. The Reynolds number represents the flow regime and is calculated using the fluid properties, flow rate, and pipe dimensions. By finding the intersection of the Reynolds number and relative roughness on Moody's diagram, you can determine the corresponding pressure drop coefficient. It's important to note that the pressure drop coefficient for steel pipes may vary depending on the specific pipe dimensions, surface roughness, and fluid properties. Therefore, it is recommended to consult relevant standards or engineering references for accurate and up-to-date values of the pressure drop coefficient for steel pipes in your specific application.

Q: What are the different coating options available for steel pipes?: There are several different coating options available for steel pipes, including epoxy coatings, polyethylene coatings, zinc coatings, and asphalt coatings. These coatings are applied to the exterior of the pipes to provide protection against corrosion, abrasion, and other environmental factors. Each coating option offers different benefits and is chosen based on the specific requirements of the project or application.

Q: What are the factors to consider when selecting pipe materials for corrosive environments?: When selecting pipe materials for corrosive environments, there are several important factors to consider in order to ensure the longevity and effectiveness of the piping system. 1. Corrosion Resistance: The most crucial factor to consider is the corrosion resistance of the pipe material. It is essential to choose a material that is highly resistant to corrosion, as corrosive environments can cause significant damage to pipes over time. Materials such as stainless steel, fiberglass, and certain types of plastics like PVC and CPVC are known for their excellent resistance to corrosion. 2. Chemical Compatibility: It is important to assess the chemical compatibility of the pipe material with the specific corrosive environment it will be exposed to. Different materials have different resistance levels to various chemicals, so it is crucial to ensure that the chosen material can withstand the specific chemicals present in the environment. Consulting chemical compatibility charts and seeking expert advice can help in making the right material selection. 3. Temperature and Pressure Requirements: The temperature and pressure conditions within the corrosive environment should also be considered when selecting pipe materials. Some materials may have limitations in terms of their temperature and pressure resistance, and exceeding these limits can lead to pipe failure. It is important to choose a material that can handle the required temperature and pressure ranges without compromising its structural integrity. 4. Cost: The cost of the pipe material and its installation should also be taken into account. While certain materials may be highly resistant to corrosion, they can also be more expensive. It is essential to strike a balance between the desired level of corrosion resistance and the available budget. 5. Maintenance and Durability: The maintenance requirements and overall durability of the pipe material should be evaluated as well. Some materials may require more frequent inspections, cleaning, or repairs compared to others. Considering the anticipated lifespan of the piping system and the ease of maintenance can help in selecting a material that will provide long-term reliability and cost-effectiveness. In conclusion, when selecting pipe materials for corrosive environments, one should consider factors such as corrosion resistance, chemical compatibility, temperature and pressure requirements, cost, and maintenance and durability. By carefully evaluating these factors, one can choose a pipe material that best suits the specific corrosive environment and ensures a reliable and long-lasting piping system.

Q: Can steel pipes be used for offshore applications?: Yes, steel pipes can be used for offshore applications. Steel pipes are commonly used in offshore oil and gas drilling operations, as they have high strength, durability, and resistance to corrosion, which are essential qualities for withstanding harsh marine environments. Additionally, steel pipes can be easily welded and fabricated to meet specific offshore project requirements.

Q: What are the common methods for inspecting the integrity of steel pipes?: To inspect the integrity of steel pipes, various methods are employed. These methods play a vital role in identifying any faults or weaknesses in the pipes that could jeopardize their structural soundness and potentially result in failures or leaks. 1. Visual Inspection: This method involves a visual examination of the external surface of the steel pipe by an inspector. The purpose is to spot any signs of damage, such as corrosion, cracks, or deformities. Although it is a quick and cost-effective approach, it may not be sufficient to detect internal defects. 2. Ultrasonic Testing (UT): UT is a non-destructive testing method that utilizes high-frequency sound waves to identify flaws in steel pipes. A transducer emits ultrasonic waves into the pipe, and any waves that bounce back are analyzed to detect defects like cracks or voids. UT is effective for inspecting both the internal and external aspects of the pipe and can provide precise measurements of defect size and location. 3. Magnetic Particle Inspection (MPI): MPI is primarily employed to detect surface or nearby surface defects in ferromagnetic materials like steel. Magnetic particles are applied to the pipe's surface, and if there is a defect, these particles will gather around it, creating a visible indication. MPI is particularly useful in identifying cracks and other discontinuities that may not be easily visible to the naked eye. 4. Radiographic Testing (RT): RT involves the use of X-rays or gamma rays to examine the internal structure of steel pipes. These rays pass through the material, and an image is recorded on a radiographic film or a digital detector. This method is effective in detecting internal defects such as cracks, voids, or inclusions. However, it necessitates proper safety measures due to the use of radiation. 5. Eddy Current Testing (ECT): ECT is a non-destructive testing method that relies on electromagnetic induction to assess the integrity of steel pipes. An alternating current is passed through a probe, generating an electromagnetic field. Any alterations in the material's electrical conductivity or magnetic permeability caused by defects are detected by the probe, providing information about the pipe's condition. These represent some of the commonly used techniques for inspecting the integrity of steel pipes. Each method possesses its own advantages and limitations, and the choice of inspection method depends on factors such as the type of defect to be identified, access to the pipe, and budgetary considerations. Regular inspection and maintenance using these methods are crucial to ensure the secure and dependable operation of steel pipe systems.

Q: What kind of argon arc welding wire is used for 16Mn steel pipe?: 16Mn steel belongs to carbon manganese steel, the content of carbon is about 0.16%, and the yield point is equal to 343MPa (strength grade is 343MPa). 16Mn steel alloy content is less, good weldability, welding generally without preheating. But because the 16Mn steel hardened tendency is slightly larger than the low carbon steel, so at low temperatures (such as winter outdoor operations) or welding in high rigidity, large thickness of the structure, in order to prevent the cold crack, need to take measures to preheat.

Q: Is the seamless steel pipe used in the market hot or cold drawn?: Small and medium-sized cold drawn and hot-rolled are many, large caliber is hot rolling, cold rolled spot less.

Q: Can the KBG25 steel tube hold 4 six types of cables?: Over five types of cables, the outer cross section is about 24 square millimeters, over six types of network cable for the outer cross section of about 35 square millimeters, so 35*4/490=28.57%, far more than 20%. Therefore, according to the norm, only 3 super six categories can be worn. If the distance is short and the joint is not enough, it can be laid like this, but it does not conform to the construction standard

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