“Difference between bolts and screws” is a very common query for most, and can be easily answered with basic description of both. Fasteners are used to fasten two or more objects together in a joint. Bolts and Screws both belong to same family of fasteners. Bolts and Screws also perform similar function of fastening objects together, share similar characters, and also look very similar, but possess highly unique qualities of their own.

They both have their own purpose for applications and should be used with proper knowledge. Wrong identification of their application can result in huge error, specially in high-end applications.

Screws

Screws is a type of fastener which is very similar to bolts. Screws are made from various alloy. Screws are used to fasten components. Screws consist of a head part followed by a circular cylindrical body with external threads on it and a pointy end at bottom to pierce. They dig into and wedge into components when rotated. The thread cuts grove into the fastened component which helps pull fastened components together and avoid pull-outs. Variety of screws is available for different types of components, commonly used screws are wood, sheet metal and plastic screws. Screws are used in light to medium applications (plywood, pressboard, drywall, sheetmetal, deck planks, etc)

Features of Screws :-

1) Screws are used independently.
2) Screws possess tapered body making it easy to drive in by tightening it with driver.
3) Screws can be used with existing threads or it can make its own thread by screwing withing the object.
4) Screw either requires a pilot-hole which need to be drilled within object thereby causing damage to object.
5) Screw-driver is required to drive screw inside.
6) Screw works on its own.

Applications of screws –

• Transport and Storage, pressure vessels, tanks, piping, and heat exchangers.
• Oil and Gas exploration and processing equipment – piping, tubing, and heat exchangers
• Cargo Tanks for Ships, High chloride environments,
• FGD / Effluent Scrubber Systems.
• Paper and Pulp Industry Digesters, Bleaching equipment and Stock-Handling Systems, Chip Pre-steaming vessels.
• Food Processing Equipment.
• Flue gas desulfurization / cleaning equipment
• Rotors, fans, shafts, and press rolls requiring combined strength and corrosion resistance
• Biofuels Plant, Desalination plants
• Firewalls and blast walls on offshore platforms

Types of Screws :- 

Below are mentioned few of different types of Screws available in market like – Cap Screws, Flat and Oval Head, Decking Screws, Security Heads, Drywall Screws, Socket Screws, Floorboard Screws, Allen Screws, Hex Head Screws, Button Head Screws, Machine Screws, Flat Head Screws, Self Drilling Screws, Shoulder Screws, Set Screws, Captive Panel Screws, Sheet Metal Screws, Binding Screws, Socket Cap Screws, Multi Material Screws, Wood Screws, Thumb Screws, etc.

Hex Tubes Inc is exclusive known as worldwide Stainless Steel Bolts Suppliers and Stainless Steel Screw Suppliers, Manufacturers, Stockist, and Exporters. We supply various form of Stainless Steel Bolts & Screws like

1) Duplex 2205 Bolts and Duplex 2205 Screws
2) Super Duplex S32750 Bolts and Super Duplex S32750 Screws
3) Super Duplex S32760 Bolts and Super Duplex S32760 Screws
4) SMO 254 Bolts and SMO 254 Screws

“What is pipe?” – Pipe is a cylindrical shaped hollow tubular structure which extends longitudinally. The round cross-section of pipe is hollow for the purpose so that it can allow conveyance of products flowing within it.

Primary purpose of a pipe is to carry the content flowing within, from one position to other. Pipes allows conveyance of content like – liquids, gasses, small solids or semi- solids, slurries, liquid gases, etc through it. Certain solid content can also be transferred with application of external force acting on them like gravity, hydraulics, extensions, air pressure guns, etc.

Pipes are applicable where there is demand for transport of various products from place A to place B in a leak-proof, smooth, damage-proof, contamination-proof manner protecting it from external environments. Pipes are generally used to transport products to longer distance and hence are used in series in piping system. At times pipe are required to be driven through contaminated zones, but its structure is such that it protects and prevents the content within from any kind of contamination surrounding it. As per the requirements, pipes can be manufactured in various grades providing the necessary features demanded by the application.

Due to its circular structure, it can withstand extremely high pressure acting on it externally as well as internally. Thus, its robust shape provides a strong environment for content within.

Pipes are available in various forms like seamless pipes, welded pipes, erw pipes, etc. and are further available in various shapes like round pipe, square pipe, rectangle pipe, etc.
Most popular pipes are decorative pipes, sanitary pipes, polish pipes, instrumentation pipes, heat exchanger pipes, bright annealing pipes, etc.

Types Of Pipes

Welded Pipes

Sanitary Pipes

Fabricated Pipes

Polished Pipes

Pipes are available in NPS (Nominal Pipe Sizes) with wall thickness which is defined by SCH (Schedule number). Pipes are made available in various ASTM standards. Pipes are made using various grades like Inconel, Incoloy, Titanium, Copper-Nickel, Duplex Steel, SMO 254 Steel, Super Duplex Steel, Nickel, Hastelloy, Stainless Steel, Monel, etc.

Pipe are highly applicable due to their unique characteristics like high resistance to – uniform corrosion, pitting and crevice corrosion, stress corrosion cracking and corrosion fatigue, abrasion and erosion, fatigue. It also displays good mechanical strength, low thermal expansion, high energy absorption, good weldability, and can be used up to 600F temperatures.
Due to such impressive qualities, 2205 stainless steel pipes are highly applicable chemical processing industry, oil and gas exploration, marine industry, seawater system for both alkaline and clean waters, scrubber systems, paper and pulp industry, food processing equipment’s, biofuels plan, desalination plants, flue gas desulfurization , firewalls and blast walls on off-shore platforms, etc.

Hex Tubes Inc is exclusive known as worldwide Stainless Steel Pipe Suppliers, Manufacturers, Stockist, and Exporters. We supply various form of Stainless Steel Pipe like

1) Duplex 2205 Pipes
2) Super Duplex S32750 Pipes
3) Super Duplex S32760 Pipes
4) SMO 254 Pipes

American Society for Mechanical Engineers (ASME)

ASME is one of the oldest standards-developing organizations in America. ASME is an American Organizational set up, to guide, monitor and work on betterment of mechanical engineering and relevant multi-disciplinary engineering through codes and standards. ASME standards represents the dimensions and tolerances with respect to each material class. ASME developed approximately 600 codes and standards covering many technical areas, such as fasteners, plumbing fixtures, elevators, pipelines, and power plant systems and components.

Many ASME standards are cited by government agencies as tools to meet their regulatory objectives. ASME’s standards are used in more than 100 countries and have been translated into numerous languages. Founded as an engineering society focused on mechanical engineering in North America, ASME is today multidisciplinary and global. ASME has over 140,000 members in 158 countries worldwide.

List of ASME Standards and Codes followed by Hex Tubes Inc in manufacturing Duplex Stainless Steel, Super Duplex Stainless Steel (UNS S32750 / UNS S32760) and SMO 254 Products :

• Pipe ASME – ASME B31
  • ASME B31.1 – 2012 – Power Piping.
  • ASME B31.2 – 1968 – Fuel Gas Piping.
  • ASME B31.3 – 2012 – Process Piping.
  • ASME B31.4 – 2012 – Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids.
  • ASME B31.5 – 2013 – Refrigeration Piping and Heat Transfer Components.
  • ASME B31.8 – 2012 – Gas Transmission and Distribution Piping Systems.
  • ASME B31.8S – 2012 – Managing System Integrity of Gas Pipelines.
  • ASME B31.9 – 2011 – Building Services Piping.
  • ASME B31.11 – 2002 – Slurry Transportation Piping Systems.
  • ASME B31.12 – 2011 – Hydrogen Piping and Pipelines.
  • ASME B31G – 2009 – Manual for Determining Remaining Strength of Corroded Pipelines.
• Flange ASME – ASME B16.5 – 1996.
• Fasteners ASME – ASME B18.12 – 2012.
• Pipe Fittings ASME – ASME B31.3 / ASME B16.9 / ASME B16.5.
• Forged Fittings ASME – ASME B16.11.