Meets USFDA requirements for food processing un 21CFR175.105 and 21CFR177.2880. Quick-Lock joining system allows close tolerance fabrication of system. While stainless steel is highly resistant to many forms of corrosion, being mindful of risks is essential to safe long-term operation and reducing costs over the life of your system.. The main features of weld neck flanges are: Weld neck flanges (Fig. An unlined fiberglass pipe of reinforced epoxy resins in 1-through 40-inch diameters containing integrally wound electrically 6 inch) or Taper/Taper (8 - 40 inch) socket end for adhesive bonding. They have the chemical resistance to stand up to acids, solvents, and other harsh substances. Powder transfer can be carried out by several different methods: showers), central heating pipes, hot and cold water and waste pipes require supplementary bonding in or close to the bathroom. For earth conductors of antennas (according to IEC 60728-11 (EN 60728-11) ), the minimum cross section is 16mm2 Cu, 25 mm2 Al or 50 mm2 steel. There are two categories of equipotential bonding: Main equipotential bonding Regulation 413-02-02 of BS 7671 states: In each installation, main equipotential bonding conductors shall connect to the main earthing terminal extraneous conductive-parts of that installation. Tank Trucks FIBERBOND Piping Systems are lightweight, corrosion resistant composite piping systems used successfully across a number of applications and market segments; Offshore Marine, Chemical & Industrial and Pulp & Paper. This American Gas Association fact sheet provides an overview of the requirements for the electrical bonding of fuel gas piping systems to the electrical grounding system based on ANSI Z223.1/NFPA 54, National Fuel Gas Code - 2018 (NFGC). Corrosion is a critical concern when choosing piping materials and designing piping processes. Quite often it was the pipe that required bonding between the flanges. Pipe and Valve bond conductors are commonly made from For what purpose are you being asked to install the bonds - static dissipation, bonding Loose-ring flange ASME B16.5 & B16.47 A CL. These include earth bonds that fit across flanges using the flange bolts as mounting points to achieve a flange bond and stainless steel / hybrid bonds for marine and Oil & Gas applications to Norwegian petroleum industry NORSOK standard M-503 and Transport Canada TP 127E Ships Electrical Standards section 4.4. Occupation. We manufacture Copper Earthing Jumpers, Flange Earthing Jumpers, Copper Jumpers, Strip Type Copper Jumpers specially designed for Pipe Line Flanges of all types of industries. Sometimes it was the flanges but to stop them accumulating a charge. NFPA 77 and the use of jumper cables and star washers at flanges. Rotate flange / pipe 90 degrees. Bonding is also required for non-electrical equipment that is near our electrical system like ventilation ducts, water and gas piping, or stairs and handrails. Static Bonding Across Piping Flanges - Chem/Petrochem/Refining. Metal baths not connected to a metal building structure do not require supplementary bonding if all metal pipe connected to them has been connected. In this guide, well discuss galvanic corrosion, where and when it might occur, and how you can minimize the Further information can be found in the Technical Measures Document on Explosion Relief. It is not a NEC requirement. 1) have a long tapered hub between the flange ring & weld joint; Hence, these flanges are referred to as high hub flanges. Flanges provide access for when equipment (or piping) needs to be cleaned, inspected or reconfigured. This American Gas Association fact sheet provides an overview of the requirements for the electrical bonding of fuel gas piping systems to the electrical grounding system based on ANSI Z223.1/NFPA 54, National Fuel Gas Code - 2018 (NFGC). 2. Flange, abbreviated as FLG, is a bolted connection where two pieces of pipe, equipment, fittings or valves are connected together to form a piping system. The neck of the pipe flanges is welded to the neck of the pipe. We work to BS 15614-1 Welding Pipes to Flanges - Welding, Bonding & Fastener engineering - Eng-Tips However, static discharges can also develop when a liquid passes through a pipe, through an opening into a tank, and/or when mixing or agitating the mixture. A safe practice calls for a relaxation time of about one minute and a flow rate reduction. 3. It also provides easy access for cleaning, inspection or modification. Table 54.8 should be used to determine the CSA of a main protective bonding conductor for PME systems. I have seen in the past where people apply separate bonding conductors across metal piping flange connections. The main purpose of this bond is to ensure that the metal water pipe is at the same zero voltage to ground as the service grounded conductor. Weld neck pipe flanges are suitable for high temperature and pressure applications. Bonding and grounding may not be enough with a low conductivity liquid. Each aboveground portion of a gas piping system upstream from the equipment shutoff valve shall be electrically continuous and bonded to the grounding electrode system.. Earthwell Industries have vast experience in earthing industries and is specialized in Copper Braided Products and Bonding & Grounding Accessories. I don't believe this is acceptable as the serrated washer is not rated for the forces that will be used, the serrated washer reduces the contact surface area, A secondary purpose is to ensure that there is a path back to the service for electrical current flow if the metal water pipe becomes energized. #5. engineer. You now have 4 x tacks on the outside and the flange is (hopefully) square in both planes. One of, if not the most critical, aspect of flammable liquids/gases piping is the bonding and grounding of the piping. bazak, This is my perspective.Please feel free to correct me if I am wrong. Once there was a concept that some petroleum fluids specially AVTAR,ker Pipe Flange. Using a hammer, lightly tap the scraper into the flange grooves to remove debris. A flange pair is made up of two flanges and a gasket with bolts and nuts . Electrical Bonding of Gas Piping Systems. Spirit level on the flange face vertically. Apr 23, 2011. I believe this to be a practice brought forth by the concerns of static discharge in hazardous areas. The supplementary equipotential bonding (Table 1) must have a minimum cross section of 2.5 mm 2 Cu for a protected installation, and 4 mm 2 Cu for an unprotected installation. They come in backing lap-joint ring flanges, and stub ends. Metallic pipes entering the building having an insulating section at their point of entry need not be connected to the protective equipotential bonding. The stub ends face acts just like a raised face of the flange, though it can be made of different materials to save costs. 150 Filament-wound loose ring (stub end) flanges with integral Quick-Lock (2 - 6 inch) or Taper/Taper Established in 1975, the Metallica Metals Group has its operations spread across major cities in India. flange surface of all debris using a wire brush (use stainless steel bristles on alloy components) or a brass scraper (a scraper can be made from a sheet of brass, ~5 mm (0.2 in) thick x 50 mm (2 in) wide, which is filed and shaped to a 45 chisel across the width). The invention provides a method for bonding a carbon fiber pipe with metal flanges internally and externally. In addition, the following statement has been added to Regulation 411.3.2. These kind of decisions should be led by an engineer rather than a spark, they have more knowledge of the material being transferred and the materials of construction of the pipework, it could be lined with plastic or glass. You can find some information in these documents, not about bonding size, but the recommendations on why/when you need the bonding across flanges o ANSI B. However it was not an unheard of specification requirement for equipment located in hazardous areas back when I was reading dozens of such specs a year. 27 Schematic shows jumper bond installation for PVC to steel fitting. Pipes are butt-welded to the stub end, leaving the lap joint free to rotate around the stub end. This appears to take the maybe out of the answer. Bond the supply pipe and the tank. To electrically bond two pipe flanges together of a steel pipe, running the length of an FPSO with various products, the contractor has proposed to use the flange bolt with a serrated washer and earthing tag to connect the earth wire. UV-Resistant Polypropylene Pipe Flanges for Chemicals. Normally the flange bolting provides a conductive path far better than you'll get with a bond conductor, especially on something like stainless. Bonds are often temporarily connected across flanges when they are being split or made up, where the pipe contains or may contain flammable substances and it is wished to avoid any risk of incendive sparking at the flanges as they are split or made up. This can occur when materials are rubbed together, such as in the classic example of walking across a carpet on a dry winter day while wearing woolen socks. And unfortunately, this "safety system" is often neglected and not managed as a PREVENTION LAYER of protection. A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. Flanges should be earth bonded; Use sub-surface dip pipes or bottom entry filling when discharging into vessels; Ensure regular inspection and testing of earth bonding. What considerations do I need to make to ensure I have qualification to weld a 88.9mm OD (7.8mm wall) pipe to a 14mm thick slip-on flange? Wrap tanks and vessels with a grounded metal sheath or foil when made of non-conductive material. Lap joint flanges are essentially a 2-component assembly. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal. Tack top and bottom on the outside once flange is level with the pipe. Use these polypropylene flanges in outdoor environments they resist the damaging effects of ultraviolet light. ..28 28 Examples of jumper bonds for various pipe situations: (a) The mortar coating was removed at the joint to attach the jumper bond; (b) jumpers were installed on the pipe across the various joints, and the weld nuggets were covered with Powder transfer. Section 250-104 (b) reads as follows: Metal Gas Piping. In the Canadian Electrical Code the minimum size of grounding conductor that may be run unprotected (by conduit, armor or other means) is #6 AWG. I Bondstrand 4000 piping system is designed for aggressive chemical service where epoxy products are suited (solvents, alkalis and non-oxidizing acids). Tack top and bottom on the outside once flange is level with the pipe. Flanges are usually welded or screwed.

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