A stainless steel manway is the lid that serves as access point to the inside of a vessel, usually consisting of a flanged nozzle with a cover plate. Also called a “manhole,” the size, style, and number used may vary from application to application. Stainless steel manways might be selected as part of a custom design or may be specified as an addition to an existing vessel.
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Walker Engineered ProductsNew Lisbon, WI 800-356-5734 Walker designs, builds & services exceptional stainless steel manways. The superior rigidity, surface quality & durability inherent in Walker's fabrications increase the efficiency & consistency of their customers' products & processes. Walker designs serviceability into all of their products to keep customer maintenance to a minimum, but when a repair is necessary, specialists are available.
Pope Scientific, Inc.Saukville, WI 262-268-9300 Pope Scientific, Incorporated has been providing chemical processing and laboratory equipment worldwide for over 40 years. Their innovative approach to application solutions includes process development, engineering, installation, training and technical support. Pope is determined to deliver you an stainless steel manway that fits your precise needs and expectations. Call Pope today.
G & F Manufacturing Company, Inc.Oak Lawn, IL 800-282-1574 G & F Manufacturing Company, Inc, Formerly known as Filpaco Industries Inc, has been in Chicago for over half a century serving its wide client base by offering its unparallel quality and workmanship. G & F Manufacturing Company, Inc has a rich track record of designing and manufacturing high quality chemical resistant, durable and rugged products, including high quality stainless steel manways.
Buckeye Fabricating CompanySpringboro, OH 800-688-9821 Founded in 1963, Buckeye Fabricating Company is a recognized industry leader for high-quality engineering and production of custom ASME fabricated pressure vessels and process tanks. We primarily serve OEMs and chemical manufacturers who require custom fabricated pressure vessels and process tanks to operate their businesses. Call us when you need stainless steel manways.
Preferred Tank & TowerEvansville, IN 270-826-7950 With decades of experience, Preferred Tank & Tower's corporate office and modern fabrication facility is located in Henderson County, Kentucky. This location provides easy access to all major transportation services. We play an integral part in the infrastructure of microwave, CATV, cellular, wireless and broadcast markets. Stainless steel manways are our specialty.
Badger Fabrication, Inc.Sauk City, WI 608-643-8229 Badger Fabrication is a family owned, custom stainless steel and waterjet cutting fabricator. We serve the food, diary and construction industry. Our state-of-the-art capabilities and craftsmanship will provide the quality, design and performance your application requires. We can provide finished products such as single shell tanks, mixers, enclosures, sanitary fittings, conduit hangers and more.
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A stainless steel manway does not need additional materials to protect its surface-its longevity is a result of alloying composition and a natural resistance to corrosion. The most common grades used for stainless steel manways are 304 and 316, which are both austenitic. These grades offer a reduced carbon content that increases corrosion-resistance, which helps to protect the material from high temperatures. Low-carbon version of 316 stainless steel, referred to as 316L, is often used because it offers higher creep, stress to rupture and tensile strength at elevated temperatures. The manways in industrial applications often meet API (American Petroleum Institute) and ASME (American Society of Mechanical Engineers) standards. API code sanitary stainless steel manways are a specialty design that meet food-hygiene grade and other industry regulations and are ideal for pharmaceutical and food, and beverage applications. The various types of manways include those specified by shape; oval, rectangular, dome, conical, flat, bubble and those specified by design; spring, slide, shadowless and hatch.
The ease of modern stainless steel fabrication techniques means that stainless steel can be cut and welded as readily as traditional steels. Manufacturing stainless steel manways begins with the raw steel melted in an electric furnace for up to 12 hours. Once it reaches recrystallization temperature, the molten steel is cast into a semi-finished form and then undergoes a process called hot rolling to solidify the shape. This is followed by heat treating through annealing, where the steel is heated and then cooled through quenching or air hardening. The stainless steel is descaled after it has cooled and this removes buildup by electrocleaning or pickling. The final size and shape of the manway is commonly obtained by plasma cutting, during which gas is blown out of a plasma torch at high speed causing the hot plasma to melt the metal away from the cut. The stainless steel manway is finished with welding. Manways come in two types: pressure manways (used on pressure vessels holding gases, chemicals, food, and beverages) and non-pressure manways (used for inspection and access applications such as for ducting systems, bin entry, cleanout ports, and fill openings). In addition, there are elliptical yoke and bolt manways are manufactured in accordance with ASME code specifications serve as access to pressure vessels. Standard or bolt-style stainless steel manways have a basic configuration suitable for most uses, and all three of these types of stainless steel manways have top and side entry, pressure or atmospheric service. Quick-open stainless steel manways are a fast access mechanism suitable for critical process tanks and storage vessels that require frequent access.
