ASTM A105 Threaded Coupling Oreder

Shanghai Zhucheng Pipe Fitting Manufacturing Co., Ltd. is a top of  high-pressure forged fittings supplier. With professional control over ASTM A105 threaded coupling and other products, as well as meticulous service, it has won the trust of domestic and foreign customers. Recently, the ASTM A105 threaded coupling ordered by an old customer in Shanghai has successfully arrived at the customer's warehouse, with professional service details throughout the process.

Production follow-up: During the order production period, provide real-time progress feedback to customers to ensure they have a clear understanding of the order dynamics;

Factory inspection: Assign a dedicated person to conduct strict inspections on product dimensions, thread accuracy, etc., and simultaneously send photos of the inspection process to customers in a visual way to reassure them of the quality of high-pressure products;

Transportation protection: To avoid thread damage during transportation, a special plastic threaded pipe cap is equipped to protect the threads. Each individual product is packaged in a sealed bag, then placed in a sealed cardboard box, and then uniformly placed in a customized wooden box for multiple protections to reduce collisions and ensure that the products received by customers are completely consistent with the factory inspection status.

Professional quality control and attentive service ensure high customer satisfaction and establish long-term cooperative relationships with the company.

Order Details

Specification of ASTM A105 Threaded Coupling 

ASTM A105 threaded coupling have become the preferred choice in many industries due to their excellent performance and high quality. Threaded coupling is a commonly used accessory in industrial pipeline connections, mainly used to connect a short section of two pipes. It is a high-pressure elbow pipe fitting formed by forging a blank from round steel or steel ingot, and then machining the thread on a lathe. According to the type of coupling, it is divided into full threaded coupling and half threaded coupling.

ASTM A105 is a standard developed by the American Society for Testing and Materials, mainly applicable to carbon steel forged fittings under high temperature and high pressure environments, including threaded couplings, elbows, tees, etc. This standard specifies the performance requirements that ASTM A105 threaded coupling must meet in high temperature and high pressure environments, covering the entire process from raw material procurement to finished product inspection. The specification scope is broad and targeted, providing important guarantees for the safe operation of pipeline systems.

ASTM A105 Material Properties

ASTM A105 material has excellent comprehensive performance. In terms of mechanical properties, its tensile strength is not less than 485MPa, yield strength is not less than 250MPa, elongation is over 20%, it has good toughness and tensile resistance, and can effectively withstand pressure and external impact during pipeline system operation. In terms of corrosion resistance, this material has good corrosion resistance to neutral aqueous solutions, steam and other media at room and medium temperatures, which can reduce the risk of pipeline fittings being damaged due to corrosion and extend their service life. In addition, it also has excellent malleability and machinability, making it easy to manufacture various complex shaped pipeline fittings to meet different pipeline connection needs.

Chemical Composition

Mechanical Properties

Types of Threaded Coupling

Based on the differences in thread processing position and connection function, ASTM A105 threaded pipe clamps are mainly divided into two types: single head threaded pipe clamps and double head threaded pipe clamps. The two types of products have distinct characteristics and their respective uses have their own focuses:

Half Threaded Coupling

Core feature: Threads are only machined on the inner or outer wall of one end of the pipe clamp, and the other end is a smooth pipe mouth (without threads on the inner wall) or a welding groove; The overall structure is simple, the processing technology is relatively simple, and the cost is lower; During installation, only the threaded end needs to be sealed, with fewer operating steps.

Main purpose: Used for the "end connection" of pipeline systems, such as the transition between pipelines and equipment interfaces. Smooth ends can be fixed to equipment flanges or pipe openings through welding, while threaded ends can be connected to pipelines to achieve a composite connection of "welding+threading", balancing sealing and disassembly convenience; Suitable for local pipelines that require frequent maintenance, such as instrument interfaces and short pipe connections before and after valves. The threaded end is easy to disassemble and maintain quickly, while the smooth end is fixed to the main pipeline through welding, reducing damage to the main pipeline.

Full Threaded Coupling

Core features: The inner walls of both ends of the pipe clamp are threaded, and the thread specifications can be the same or different; Both ends have consistent thread accuracy and can be used to connect pipelines in both directions; Pipeline docking can be completed without welding, with high installation efficiency; By adjusting the depth of thread engagement and fine-tuning the length of the pipeline, it is possible to adapt to on-site installation errors.

Main application: When the thread specifications at both ends are the same, it is used for "straight connection" of two pipes with the same diameter, such as extending straight pipe sections and connecting broken pipes during pipeline maintenance. It is widely used for connecting straight pipe sections in oil and gas transportation; When the thread specifications of the two ends are different (i.e. reducing double head threaded pipe clamps), it is used for "variable diameter connection" of pipes with different diameters, such as transitioning from DN50 pipes to DN40 pipes, without the need for additional variable diameter joints, and can be smoothly transitioned directly through pipe clamps. It is commonly used in the connection of different process pipelines in chemical plants.

Class of the Fittings VS the Grade of the Connecting Pipes

Characteristics of ASTM A105 Threaded Coupling

ASTM A105 threaded coupling have many significant features that make them stand out in pipeline connections:

Convenient connection: Using threaded connection method, no complex welding process is required, and installation can be completed with tools such as wrenches, greatly reducing construction time and improving installation efficiency, especially suitable for situations with limited on-site installation conditions.

Good sealing performance: The thread accuracy is strictly processed according to relevant standards and used in conjunction with specialized sealing materials (such as raw tape and sealant) to effectively prevent medium leakage inside the pipeline, ensure the sealing performance of the pipeline system, and reduce safety hazards and economic losses caused by leakage.

High strength: Based on the excellent mechanical properties of ASTM A105 material, the threaded pipe clamp has high overall strength and can withstand large pipeline pressure and external forces, without deformation or fracture, ensuring the long-term stable operation of the pipeline system.

Strong universality: Compliant with internationally recognized thread standards and size specifications, compatible with pipes and fittings of different brands and specifications, reducing the difficulty of pipeline system design and maintenance, and improving product universality and interchangeability.

Introduction to Common Thread Forms

The thread form is a key factor affecting the connection performance of threaded pipe clamps. The common thread forms of ASTM A105 threaded pipe clamps are NPT, BSP, and PT. 

NPT (American standard taper pipe thread): This is a commonly used taper pipe thread with a thread profile of 60 ° and self sealing characteristics. Due to the conical shape of the thread, the tooth sides of the internal and external threads are tightly fitted during the connection process, and a certain sealing effect can be achieved without the need for additional sealing components, making it suitable for medium and low pressure pipeline systems. NPT threads are divided into NPT external threads and NPT internal threads. During installation, attention should be paid to the length and torque control of the threads to ensure sealing performance and connection strength.

BSP (British Standard Cone Pipe Thread): BSP is the overall code for British pipe threads, but it is divided into three types: BSPP, BSPT, and BSPF.

BSPP is the code for British cylindrical pipe threads, with only internal threads, equivalent to 55 degree cylindrical (parallel) pipe threads in China;

BSPT: It is a British conical pipe thread standard, which refers to a thread profile angle of 55 degrees and a taper of 1:16,

BSPF: for British fine tooth pipe threads; The first two are used for sealing joints, while the latter one is used for general joints.

Compared with NPT threads, BSPT threads have different pitch and size specifications, and are mainly widely used in Europe and Commonwealth countries. When selecting, it is necessary to determine the appropriate thread form based on the design standards of the pipeline system and the region of use, to ensure compatibility and reliability of the connection.

PT : It is a 55 degree sealed conical pipe thread, belonging to the Wyeth thread family, commonly used in Europe and federal countries, commonly used in the water and gas pipe industry, with a taper of 1:16. The marking of pipe threads consists of thread characteristic code (R) and size code. R1/2 represents an R thread with a thread size of 1/2.

ASTM A105 threaded pipe clamps provide efficient and safe connection solutions for various pipeline systems due to their excellent performance, outstanding features, and convenient threaded connections.