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 do steel pipes handle extreme temperatures?: Steel pipes can handle extreme temperatures due to their high strength and thermal stability. The properties of steel, such as its excellent heat resistance and low thermal expansion, allow it to withstand both high and low temperatures without significant deformation or structural damage. Additionally, the use of specialized coatings and insulation can further enhance the heat resistance of steel pipes, making them suitable for a wide range of applications in extreme temperature environments.

Q: What are the factors to consider when selecting steel pipes for a specific application?: When selecting steel pipes for a specific application, several factors need to be considered. The key factors include the required strength and durability, corrosion resistance, temperature and pressure requirements, size and dimensions, cost considerations, and compatibility with other materials or systems. Additionally, factors such as the intended environment, installation requirements, and regulatory compliance should also be taken into account to ensure the optimal selection of steel pipes for the particular application.

Q: What does cathodic protection of steel tubes mean?: There are two ways of cathodic protection: sacrificial anode, cathodic protection and impressed current cathodic protection.Sacrificial anode: connect a living metal or alloy to a protective metal to form a galvanic cell. The active metal replaces the protected metal to lose electrons so that the protected metal is not corroded.

Q: How are steel pipes used in the wastewater treatment industry?: Steel pipes are commonly used in the wastewater treatment industry for various purposes, including the transportation of wastewater from one area to another, the distribution of treated water to different locations, and the construction of infrastructure such as pumping stations and treatment plants. Due to their durability, resistance to corrosion, and ability to withstand high pressure, steel pipes are essential components in the efficient and reliable operation of wastewater treatment systems.

Q: What are the different types of steel pipe fittings for gas pipelines?: There are several types of steel pipe fittings commonly used for gas pipelines, including elbows, tees, reducers, flanges, and couplings. Elbows are used to change the direction of the pipeline, while tees are used to create branch connections. Reducers are used to connect pipes of different sizes, and flanges are used for connecting pipes with valves or other equipment. Couplings are used to join two pipes together.

Q: How are steel pipes inspected for quality?: The quality of steel pipes undergoes a thorough examination process involving diverse techniques and standards. Trained professionals conduct visual inspections to scrutinize the pipes for visible defects such as cracks, dents, or surface irregularities. This examination guarantees that the pipes meet the required specifications and are devoid of any visible flaws. Furthermore, non-destructive testing (NDT) methods are utilized to assess the internal and external quality of the steel pipes. Among the commonly used NDT techniques, ultrasonic testing stands out. This method involves transmitting ultrasonic waves through the pipes to detect any internal defects or inconsistencies in the material. It effectively identifies issues such as variations in wall thickness, inclusions, or weld defects that could compromise the pipe's integrity. Another widely employed NDT technique is magnetic particle inspection. By utilizing magnetic fields and iron particles, this method identifies surface cracks or flaws in the steel pipes. It is particularly effective for detecting defects in ferromagnetic materials and can be performed on both the outer and inner surfaces of the pipes. Moreover, hydrostatic testing is frequently conducted to evaluate the strength and pressure resistance of the pipes. This process involves filling the pipes with water or a suitable fluid and subjecting them to a specified pressure to check for leaks or structural weaknesses. This test ensures that the pipes can withstand the intended operational conditions without failing. In addition to these techniques, various quality control measures are implemented throughout the manufacturing process. These measures include material traceability, dimensional checks, and chemical composition analysis. They play a crucial role in ensuring that the steel pipes meet the required standards and specifications, thereby guaranteeing their quality and reliability. In summary, the inspection of steel pipes for quality involves a comprehensive approach encompassing visual inspection, non-destructive testing methods, and quality control measures. These thorough procedures enable the identification of defects, inconsistencies, or weaknesses, ensuring that the pipes meet the necessary quality standards and are suitable for their intended purpose.

Q: Do steel pipes expand or contract with temperature changes?: Steel pipes expand when subjected to an increase in temperature and contract when exposed to a decrease in temperature. This phenomenon is a result of the thermal expansion and contraction properties of steel, which is a characteristic of most materials. When steel pipes are heated, the molecules within the metal gain energy and vibrate more vigorously, causing them to move apart and expand in size. Conversely, when the temperature of the steel pipes decreases, the molecules lose energy and move closer together, resulting in a contraction or shrinkage in size. It is important to consider these thermal expansion and contraction properties of steel pipes when designing and installing them, as failure to account for these changes may lead to structural damage, leaks, or other issues.

Q: Can steel pipes be used for chemical storage tanks?: Steel pipes can be used for chemical storage tanks, but it depends on the specific application and the type of chemicals being stored. Steel is generally a strong and durable material, making it suitable for many industrial applications. However, certain chemicals can react with steel, causing corrosion and potentially compromising the integrity of the tank. In such cases, it is important to use corrosion-resistant coatings or linings on the steel pipes to protect against chemical reactions. Additionally, the design and construction of the tank should adhere to industry standards and regulations to ensure safe storage of chemicals. Therefore, while steel pipes can be used for chemical storage tanks, careful consideration must be given to the type of chemicals being stored and appropriate measures taken to prevent corrosion and ensure safety.

Q: How can seamless steel tubes be produced?: After extrusion to remove pipe sizing. The sizing machine passes through the cone bit and rotates into the steel embryo at high speed to form a steel tube. The inner diameter of the steel pipe is determined by the outside diameter and length of the sizing machine. When the steel tube is fixed, it enters the cooling tower and is cooled by spraying water. The steel tube is straightened after cooling. After straightening, the steel pipe is sent to the metal flaw detector (or water pressure experiment) by the conveyor belt for internal inspection. If there are cracks in the steel pipe, bubbles and other problems will be detected. Steel pipe quality inspection, but also through strict manual selection. After the quality inspection of the steel pipe, spray with the paint on the number, specifications, production batch number and so on. The crane is hoisted into the warehouse.

Q: Can steel pipes be used for power plant construction?: Yes, steel pipes can be used for power plant construction. Steel pipes are commonly employed in power plants for various applications such as the transportation of fluids, steam, and gases, as well as for structural support. They offer high strength, durability, and resistance to extreme temperatures and pressures, making them suitable for the demanding conditions found in power plants.

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