Advantages of Galvanization
Texas Flange is proud to offer a full range of galvanized flanges for our customers. We stock a line of hot dip zinc galvanized flanges to ASTM A123 and ASTM A153, and we can provide many custom items with this protective coating as well. Here are a few noticeable advantages to this process:
Protection from elements - galvanized flanges are superior to exposure to the elements versus painted carbon steel and offer longer life cycles in many cases as well, due to their resistance to corrosion from rain and other naturally occurring weather/climate issues.
Physical durability - you will often have more use and shelf life from galvanized flanges in comparison to uncoated carbon steel and ductile iron, due to the metallurgical bond present between the zinc coat and the actual steel. This provides excellent protection from physical damage to the flange in question.
Limited base exposure - a zinc hot dip coating on flanges and steel components per ASTM standards is superior to regular plating, which may leave exposure for crevices, machined surfaces, and some difficult to reach portions of the flange in question. The process provides noticeably more zinc coating than regular plating.
Affordability – commodity hot dip galvanized flanges can provide a good alternative to stainless and chrome alloys from a cost benefit perspective, depending on your specific application. If the superior chemical requirements of certain jobs do not apply, they are an excellent alternative to standard carbon steel flanges.
Just a friendly reminder to everyone that long weld neck flanges and their variants do not have schedule bores. These flanges are typically made with square cut ends to replace pipe, not to be used as flanges to weld up to pipe. You may request any wall thickness and additional custom weld bevel you would like, but the standard for these flanges is defined per the dimensions in our catalog. The actual bore size for regular long weld neck flanges (NOT heavy barrels) is the same as the nominal size of the flange. So for example, on a two inch long weld neck flange, the bore size is 2.00 inches.
Let us know if you have any other questions about these flanges, or contact us to get a quote today.
The specification for orifice flange sets is not particularly clear about ring groove connections for these flange assemblies. Our proprietary CAD flange drawings can give the impression that ring grooves are cut into the face of a flange that may be considered “flat face,” however this is not the case if you review the dimensions. For RTJ orifice flanges, the flange thickness *exclusive* of the depth of the groove must meet the same minimum thickness as that of a standard raised face orifice flange assembly, exclusive of the height of the raised face. Visually speaking, though it may *appear* that the flange groove is cut into a flat face, you can confirm with the dimensions outlined in the B16.36 flange specification that it is more accurately what some would refer to as a “full face” with extra thickness (how much thickness depends on the depth of the groove, just as it would be defined in ASME/ANSI B16.5). Some manufacturers still machine down the should of the face to make it appear similar to the raised portion of a proper RTJ groove flange, in order to avoid initial confusion. Also, note that larger RTJ orifice flanges will require angular taps to ensure proper clearance with the bottom of the groove, which cannot be altered or modified in any way.
In other words: NO, you cannot take a raised face orifice flange, machine down the face, add a groove, and just call it an RTJ orifice flange. Minimum dimensional requirements for flanges must meet the tolerances outlined in ASME / ANSI B16.36 and B16.5 No shortcuts, or else you are out of compliance!
The American Water Works Association has suspended the utilization of “hub” type flanges in their C207 and associated specifications. All flanges per AWWA specs are either “ring” type slip on flanges or “blind” type flanges. The aforementioned “hub” type flanges as outlined in AWWA C207 Class D and C207 Class E are derived from ASME specifications 125# Lightweight and 125# Slip On, respectively. We will still provide flanges as dual certified to both of these specifications, with the understanding that they will not be manufactured and stamped per the latest update of the AWWA standard.
As is standard from Texas Flange, you may request these flanges in any commercially available material grade you require. The most common are still carbon flanges, mild steel flanges and stainless steel flange variants. Please be advised that while many of these items are available in stock in carbon steel grades, most stainless, chrome, and nickel alloy type flanges are made to order, given the popularity of carbon steel flanges for the majority of water works flange and piping projects. Their lower pressure requirements and ambient temperature operation typically mean a more exotic alloy flange is not required. Any questions or concerns, please feel free to contact any of our trained sales staff here at Texas Flange.
Boltex and Weldbend Corporation Applaud ITC Preliminary Injury Decision on Unfairly Traded Imports
Houston, TX and Argo, IL, August 12, 2016 – Today Boltex Manufacturing Co., L.P. (“Boltex”) and Weldbend Corporation (“Weldbend”) announced that the U.S. International Trade Commission (“ITC”) preliminarily determined that imports of finished carbon steel flanges from India, Italy and Spain are causing injury to the domestic industry. The Commission vote was 6-0, resulting in an affirmative decision. The ruling by the ITC demonstrates that there is a reasonable indication that imports are injuring the domestic flange industry and American workers. As a result of this decision, these cases against foreign producers in the above-named countries will proceed.“We applaud the affirmative decision found by the ITC, ruling that imports of finished carbon steel flanges from India,Italy and Spain have caused injury to U.S. producers,” says Frank Bernobich, President of Boltex. “Today’s vote marks a step in the right direction to restore fair trade practices and allow the market to operate on a level playing field.”“As family owned and operated businesses, the decision to file petitions against these unfair trade practices was a significant undertaking, but one that was necessary for our survival,” says James Coulas, Jr., President and CEO of Weldbend. “For generations Weldbend and its employees have manufactured great products and we only ask for the ability to operate in a fair market. We are extremely pleased with the ITC’s preliminary decision and that our cases can proceed.”
Boltex and Weldbend filed petitions concurrently with the ITC and the U.S. Department of Commerce (“Commerce”) on June 30, 2016. The ITC initiated their investigation on June 30, 2016 and Commerce initiated their investigations on July 20, 2016.Commerce will calculate antidumping margins and subsidy rates, which are designed to offset the amount by which the product is sold at less than fair value and the amount by which the product benefits from unfair government subsidies. In the Department’s initiation notice the Department estimated the dumping margins for steel flanges as “(1) India ranges from 17.80 to 37.84 percent; (2) Italy ranges from 15.76 percent to 204.53percent; and (3) Spain ranges from 13.19 percent to 24.43 percent” The subsidy rate from India was estimated to be above de minimis. Commerce is currently scheduled to make its preliminary subsidy determination on September 23, 2016, and its preliminary dumping determinations on . If an affirmative decision is found, Commerce will instruct U.S. Customs to collect antidumping duty cash deposits to offset the subsidies.