The passage primarily explores the thread standards for nipples and pipes in Europe. If you're looking for specific information, simply click the highlighted blue titles to jump directly to what you need.
**1. Pipe Nipples: Varieties and Thread Standards**
**(1) Types**
Pipe nipples come in various forms, each serving unique purposes. These include:
- **Running Nipple/Close Nipple:** Both feature threads that almost entirely cover the nipple. A running nipple extends beyond the length of a standard nipple, allowing for closer connections and greater flexibility in adjusting the length. Conversely, a close nipple is extremely short, with threads covering most of its length and only a small unthreaded section in the middle, typically used for connecting two fittings or valves closely together to prevent excessive gaps.
- **Long Screw Pipe Nipple:** Similar to the running nipple but longer, it offers more adjustment space during installation. This makes it ideal for piping systems that require some degree of flexibility within set limits. It provides both stability and adjustability. More details about long screw pipe nipples and their associated thread standards will be discussed later in this article.
- **Barrel Nipple:** Features threads on both ends and an unthreaded middle section, giving it a barrel-like shape. This design enhances strength and stability, making it perfect for construction piping, water systems, and the petrochemical industry.
- **Welding Nipple:** Designed to be permanently welded onto other pipes or equipment, forming a secure connection. Unlike other types, welding nipples cannot be easily removed or replaced by simply unscrewing them. They are ideal for high-pressure steam or oil pipelines and other demanding environments where durability and leak-proof performance are critical.
- **Reducing Hose Nipple:** Combines a larger diameter connector with a smaller one on the opposite side, facilitating fluid flow adjustments. This type is particularly useful in systems where varying diameters are required to manage pressure and flow efficiently.
**(2) Standards**
Pipe nipples adhere to general standards and specific thread standards. **DIN2982**, a comprehensive standard, ensures compatibility, reliability, and airtightness. It outlines the design, manufacturing, and testing requirements for nipples, specifying exact diameters and screw pitches for male threads across different specifications. Materials typically include carbon steel, stainless steel, and alloys to ensure corrosion resistance and structural integrity in diverse environments.
Three common international thread standards govern the specifications, connection types, and more:
- **DIN2999 (German Standard):** Widely adopted in European countries, it ensures airtightness for gas and liquid transport in industrial settings.
- **BS21 (British Standard):** Offers two types of threads—tapered (BSPT) and straight (BSPP). These threads seal effectively without additional gaskets or sealing materials, providing excellent sealing properties.
- **ISO7-1:** An international standard applicable across various industrial and construction piping systems, ensuring global uniformity in thread connections.
**2. An Overview of Industrial Pipes**
**(1) Standards**
Industrial pipes follow distinct standards depending on their intended use. Two primary standards are:
- **DIN2440 (Germany):** Commonly used in gas and water transport, HVAC systems, etc., with thickness ranges catering to thin to medium applications designed for medium and low-pressure uses.
- **BS1387 (UK):** Suitable for water, gas, and other liquid transportation, offering light, medium, and heavy thickness options to meet varying pressure demands.
**(2) Thickness**
Pipes vary significantly in thickness, impacting their pressure-bearing capacity and cost. Key categories include:
- **Light:** Thinnest, ideal for low-pressure applications like household water supply and HVAC systems. Lightweight, easy to install, and cost-effective.
- **Medium:** Balances thickness and strength, suitable for moderate temperature and pressure applications in industries and construction sectors.
- **Heavy:** Thickest, designed for high-pressure environments such as chemical processing, gas transportation, and steam systems. Their robust nature makes them suitable for boiler tubes and high-pressure gas plumbing.
**(3) Extra-Heavy**
Specifically designed for extreme conditions, these pipes exceed schedule 160 in thickness, offering unparalleled strength and durability. Ideal for nuclear power plants, deep-sea drilling, and high-pressure steam lines.
*Click here* to discover the right pipes for your industry and further insights!
**3. Surface Treatments**
**(1) Electro-Galvanized**
Provides a thin, shiny coating with minimal corrosion resistance, best suited for indoor use. Cost-effective and aesthetically pleasing.
**(2) Hot-Dip Galvanized**
Offers a thicker layer with superior corrosion resistance, ideal for outdoor and harsh conditions. Although less visually appealing, its performance far outweighs its appearance.
Choose hot-dip galvanized fittings for long-term durability and applications requiring high corrosion resistance, whereas electro-galvanized options are more economical for temporary or environmentally friendly uses.
**4. More About Long-Screw Pipes**
Long-screw pipes align with the ISO7-1 standard and come in various types:
**(1) Parallel Thread**
Both inner and outer diameters remain constant throughout the threaded portion, making it suitable for low-pressure detachable connections.
**(2) Taper Thread**
One end is larger than the other, enhancing sealing capabilities under high temperatures or pressures.
**(3) Cylinder Thread (G Thread)**
Complies with DIN 259 and features a 55-degree non-threaded seal, compatible with parallel threaded fittings. Its effectiveness relies heavily on precision, material quality, and proper assembly.
This exploration aims to provide a thorough understanding of pipe nipples and industrial pipes, ensuring informed decisions based on specific requirements and environmental conditions.
3PCS/4PCS Shield Anchor
3PCS/4PCS Shield Anchor
Hebei Qianmu Fastener Manufacturing Co., Ltd , https://www.qmjgjfasteners.com