ASME B16.21 ASME B16.21-2011NONMETALLIC FLAT GASKETS FOR PIPE FLANGES 1 SCOPEThis Standard covers types, sizes, materials, dimensions, tolerances, and markings for nonmetallic flat gaskets. These gaskets are dimensionally suitable for use with flanges described in the referenced flange standards. 2 GENERAL 2.1 Relevant UnitsThis Standard states values both in SI (metric) and U.S. Customary units. […]
ASME B16.20 Spiral Wound Gaskets: A Comprehensive Overview 1. What Is an ASME B16.20 Spiral Wound Gasket?ASME B16.20 is a standard developed by the American Society of Mechanical Engineers (ASME) that governs the design, materials, dimensions, tolerances, and marking of metallic gaskets—specifically spiral wound, kammprofile, and ring joint gaskets—for use with flanges covered by ASME […]
PTFE Manufacturing Process & Properties Manufacturing Process & Properties of Polytetrafluoroethylene (PTFE) Manufacturing Process of Polytetrafluoroethylene Material: 1 Raw Material Preparation; Ingredients: For pure F4 products, the raw material is F4 fine resin, which is crushed and sieved. 2 Mold Preparation: Clean with alcohol to ensure there is no rust or attachments inside the compression […]
The Ministry of Commerce (MOFCOM) and the General Administration of Customs (GAC) of the People’s Republic of China jointly issued Announcement No. 79 of 2025, announcing the decision to implement export license management for certain steel products. The new regulation is set to take effect on [Effective Date, e.g., January 1, 2026]. The announcement specifies that […]
PTFE Fiber vs. PTFE Yarn: Decoding the Difference in Compression Packing Understanding material construction is key to optimal sealing performance in pumps and valves. The Basics: PTFE in Fluid Sealing Polytetrafluoroethylene (PTFE) is a cornerstone material in compression packing due to its unparalleled chemical resistance, low coefficient of friction, and wide temperature tolerance. When it […]
The Unsung Heroes of Fluid Power: A Deep Dive into Hydraulic Seals Hydraulic seals are mission-critical components that separate fluids, block contaminants, and maintain the pressure essential for hydraulic systems to function efficiently. Operating under extreme pressure, temperature, and dynamic movement, selecting the correct seal is vital for preventing system failure, reducing maintenance costs, and […]
Complete Guide to Compression Packing Materials | Industrial Sealing Solutions The Complete Guide to Compression Packing Materials Compression packings are essential sealing components used across numerous industries to prevent leakage in pumps, valves, and other industrial equipment. Understanding the different materials available is crucial for selecting the right compression packings for specific applications, temperatures, pressures, […]
Sunholly employs internationally advanced technology and equipment to produce its main products, which include four major series with over a hundred varieties: PTFE molding-grade powders and pellets, extrusion-grade pellets, filler-grade powders and pellets, and lubricant-grade PTFE ultrafine powders. The annual production capacity reaches 1,000 tons. Sunholly’s products are deep-processed from raw PTFE powders using advanced […]
Introduction In the world of mechanical seals and sealing solutions, PTFE (Polytetrafluoroethylene) lantern rings play a crucial role in ensuring the efficiency and longevity of equipment. These small but mighty components are often overlooked, yet they are vital in preventing leaks and maintaining the integrity of sealing systems. In this blog, we’ll dive into what […]
Anthracite volatile content ≤8%) 995.0 CNY/ton Mixed coal (4,500 kcal) 583.0 CNY/ton, the same as last period. High-quality mixed coal 5,000 kcal) 670.0 CNY/ton High-quality mixed coal 5,500 kcal) 764.5 CNY/ton Mixed coal with a calorific value of 5,800 kcal) 807.3 CNY/ton Coking coal with sulfur content <1%) 1,380.0 CNY/ton Coke 12.01% ≤ ash content […]