What Is Pipe Thread?

June 07, 2025

Pipe threads are special threads designed for connections on the walls of pipes. They come in two primary types: unsealed and sealed versions with a 55-degree angle. These threads are essential for ensuring tight fits between internal and external components, making them crucial for various applications. There are two main categories of pipe threads: straight and tapered. Straight pipe threads maintain a consistent diameter throughout their length, while tapered threads gradually decrease in size toward one end. Common examples include NPT (National Pipe Taper), PT (Pipe Thread), and G (Gas) threads. Each type serves specific purposes and is suited to particular industries or environments. NPT threads are part of the American standard and feature a 60-degree taper, commonly used in North America. PT threads, also known as BSPT (British Standard Pipe Taper), have a 55-degree angle and are popular in Europe and Commonwealth nations, especially within the water and gas industries. G threads, another 55-degree option, are unsealed and belong to the same family as PT threads but are more versatile due to their cylindrical design. Thread specifications often include fractional inch sizes like 1/4, 1/2, and 1/8, which denote the diameter of the thread. In the industry, these sizes are sometimes referred to in points, where one inch equals eight points. For instance, 1/4 inch corresponds to two points. The distinction between 55-degree and 60-degree threads lies primarily in their application and compatibility. While both serve similar functions, they cater to different standards and preferences globally. The 55-degree threads, including G and PT, align with older imperial standards, whereas 60-degree threads like NPT follow newer conventions. Historically, the development of pipe threads began with the British Wyeth thread in 1841, evolving over time into modern standards. The introduction of the ISO standards in the mid-20th century helped unify global practices, leading to widespread acceptance outside North America. When it comes to manufacturing, Hebei Sanvo Pipes And Fittings Co., Ltd. stands out as a premier provider of high-quality pipe fittings in China. Specializing in NPT, BSPT, and stainless steel fittings, the company offers durable solutions for sectors such as oil, gas, water management, and more. Their products comply with rigorous international standards, ensuring reliability across diverse operational conditions. For those seeking reliable suppliers of threaded pipe fittings, Sanvo provides an excellent choice. With a strong presence in multiple markets worldwide, they continue to build lasting partnerships through quality assurance and customer-centric services. If you're interested in exploring potential collaborations or need further information about their offerings, feel free to reach out via email at [insert email address].
Dispenser Mass Flow Meter
Sealand is a trustworthy manufacturer of CNG Dispenser Mass Flow Meter, LNG Dispenser Mass Flow Meter, LPG Dispenser Mass Flow Meter, ATEX, CE & IECEx approved.

With its high accuracy, wide rangeability and reliable performance, Sealand meter has been applied in many kinds of industries during the last 8 years. Unlike others who only focus on the measurement of liquid at normal pressure & temperature, Sealand has conquered the difficulty in the measurement under severe conditions, such as high pressure, high viscosity, high & low temperature.

Take CNG (compressed natural gas) for example. As the saying goes, the meter can measure anything else if it can measure CNG. It is quite hard to measure gas under high pressure. The sensor must be able to bear high pressure; in this way, the thickness of flow tube must be increased, so the transmitter shall be more sensitive to detect the signal; however, Sealand made it. Sealand's first model is specially designed for CNG dispenser, and now thousands of this model are put into use on the market.

Here are the pictures of Sealand Mass Flow Meter in Dispenser for your reference.

CNG Dispenser Mass Flow Meter, LNG Dispenser Mass Flow Meter, LPG Dispenser Mass Flow Meter
Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeter.com