• Couplings for steel pipes System 1
Couplings for steel pipes

Couplings for steel pipes

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China Main Port
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TT OR LC
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Std Ref.: API 5CT 5B ISO9001, 2008

Grade: J55,K55, N80-1,N80-Q,L80,C90,P110

Size: tubing 1.9"to4-1/2", casing 4-1/2"to13-3/8"


1.Grade: K55, N80-1, N80-Q, L80, C90, P110


2.We also supply permium thread products by customer's request


3.Size: tubing coupling from 1.9" to 4-1/2",Casing coupling fro4-1/2"to 13-3/8"


4.Type: NU, EU(tubing coupling), STC,LC,BTC(casing coupling).


5.Surface treatment: Whole phosphating, or inside phosphating and outside coating


6.Packing: By carton, wooden case, wooden pallet, or by  requirements of customers



Otherwise, Our company manufactures and sells casing and tubing couplings,pup joints, tool joints, adapter pup-joints, adapter couplings, stabilizers, anchors of oil pumps and revolving sand gravitated device of well, etc. We always do business based on the principle of equality and mutual benefit, we provide the high quality and competitive price products.


Q:What is the impact resistance of steel pipes?
Steel pipes have high impact resistance, meaning they can withstand significant external forces without fracturing or breaking. This makes them highly durable and suitable for various applications, especially in industries where they are subjected to heavy loads or potential impacts.
Q:Can steel pipes be used for steam distribution?
Yes, steel pipes can be used for steam distribution. Steel pipes are known for their high strength and durability, making them suitable for carrying steam at high temperatures and pressures. Additionally, steel pipes have excellent thermal conductivity, allowing for efficient heat transfer during steam distribution.
Q:What are the different methods of pipe support for steel pipes?
Various methods exist for supporting steel pipes, each aimed at guaranteeing pipe stability, alignment, and protection. Some frequently employed techniques are as follows: 1. Pipe Hangers: These devices suspend or bear the weight of the pipe from above. Typically crafted from metal, they can be adjustable or fixed, allowing for easy installation and maintenance. Depending on the application, pipe hangers can take the form of clevis hangers, beam clamps, or pipe rollers. 2. Pipe Shoes: These supports attach directly to the underside of the pipe, providing a stable resting surface. Usually made from steel or other durable materials, pipe shoes prevent pipe movement, absorb vibrations, and distribute weight evenly. They find common use in applications involving high temperatures or requiring thermal expansion. 3. Pipe Clamps: These devices fasten pipes together or secure them to structures. Constructed primarily of metal, pipe clamps come in various sizes and designs to accommodate different pipe diameters and configurations. They provide support and prevent sagging or movement, particularly in areas with directional or elevation changes. 4. Pipe Racks: These structures are custom-designed to support multiple pipes in an organized and secure manner. Commonly found in industrial settings like refineries or power plants, pipe racks store or support large quantities of pipes. Typically made of steel, they can be tailored to suit different pipe sizes and layouts. 5. Pipe Guides: These devices facilitate pipe movement control, especially during thermal expansion or contraction. Fixed to the structure, pipe guides offer a sliding surface that accommodates longitudinal pipe movement. They are frequently utilized in applications involving temperature variations, such as steam or hot water systems. These represent just a few examples of the numerous methods available for supporting steel pipes. The choice of support method depends on factors such as pipe size, weight, temperature, and specific application requirements. Selecting the appropriate support method is crucial to ensure pipe longevity and integrity while preventing issues like sagging, misalignment, or failure.
Q:Are steel pipes suitable for structural applications?
Yes, steel pipes are suitable for structural applications. Steel pipes are known for their strength, durability, and versatility, making them ideal for various structural applications. They can be used in buildings, bridges, stadiums, and other structures to provide support and stability. Steel pipes have high tensile strength, which allows them to withstand heavy loads and resist deformation under pressure. Additionally, their resistance to corrosion makes them a reliable choice for structural applications, even in harsh environments. The use of steel pipes in structural applications is further enhanced by their cost-effectiveness and easy installation. Overall, steel pipes are a popular choice in the construction industry due to their strength, durability, versatility, and cost-effectiveness.
Q:What are the different types of steel pipe coatings for drinking water pipelines?
There are several types of steel pipe coatings used for drinking water pipelines, including fusion bonded epoxy (FBE), polyethylene (PE), and polyurethane (PU) coatings. Each coating offers different advantages, such as corrosion resistance, durability, and smoothness, to ensure the safety and quality of drinking water.
Q:How are steel pipes protected against soil movement?
Steel pipes are protected against soil movement through the use of various techniques such as trenching, backfilling, and proper installation of support structures. Additionally, protective measures like the use of casing pipes or concrete encasement can be employed to prevent direct contact with the soil and minimize the impact of soil movement on the steel pipes.
Q:What are the standard dimensions for steel pipes?
The standard dimensions for steel pipes vary depending on the application and industry. However, common sizes range from ½ inch to 48 inches in diameter and have various wall thicknesses based on the required strength and pressure rating.
Q:What are the different types of threading on steel pipes?
There are several different types of threading commonly used on steel pipes, including tapered, parallel, and buttress threading. Tapered threading is typically used for pipes that require a tight seal, as the threads gradually narrow towards the end of the pipe. Parallel threading, on the other hand, has threads that run parallel to the pipe's axis and is often used for pipes that need to be easily assembled and disassembled. Buttress threading is a combination of tapered and parallel threading, featuring one side with a tapered thread and the other side with a straight thread. This type of threading is often used for pipes that require both a secure connection and easy installation.
Q:Can steel pipes be bent?
Steel pipes can indeed be bent. To achieve this, one usually employs specific tools and methods like pipe bending machines or hydraulic presses. These tools exert pressure on the pipe, leading it to change shape and adopt the desired angle or form. The flexibility of steel pipes makes them adaptable and appropriate for an array of purposes, such as plumbing, construction, and manufacturing. Nonetheless, it's crucial to acknowledge that the extent to which a steel pipe can be bent relies on factors like its diameter, wall thickness, and the type of steel employed.
Q:How does the price of steel pipes vary based on size and grade?
The price of steel pipes can vary based on their size and grade. Generally, larger pipes tend to have higher prices due to the increased amount of raw materials required for their production. Additionally, pipes with higher-grade steel, which offers better strength and durability, often come at a higher cost compared to lower-grade options. The size and grade of steel pipes are important factors to consider when determining their price in the market.

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