ベンカン機工 List of Products and Services

Are you thinking, 'It's impossible because stainless steel piping is too expensive'? By using stainless steel for fire protection piping, you can extend the lifespan of the piping system due to the corrosion resistance characteristic of stainless steel compared to carbon steel. Additionally, the strength of stainless steel allows for thinner piping, making it possible to save space. In the case of stainless steel, the weight of the piping can be reduced to about 70% of that of carbon steel, so you can easily understand its strength and space-saving benefits. This also leads to reduced labor costs on-site. Benkan Kiko's pipe fittings (Su fittings) are approved for use under the Fire Service Act and have obtained JIS standard certification (JIS B 2309). The trusted brand Benkan Kiko's Su fittings, used not only for fire protection systems but also for general piping stainless steel, will assist you in converting fire protection piping to stainless steel. In March 2020, the amount of hexavalent chromium compounds was revised in the "Ordinance to Partially Amend the Ordinance on Water Quality Standards," and our company has conducted leaching performance tests under the new standards, ensuring that our Su fittings meet the revised water quality standards.

A non-standard angle elbow refers to elbows with intermediate angles other than the typical 90° or 45°. In piping design, by manufacturing special intermediate angle elbows such as 85.5°, 37°, or 135°, it becomes possible to accommodate piping that cannot be managed with standard 90° or 45° elbows, allowing for installation in spaces that standard elbows cannot fit into. We can manufacture elbows at the angles requested by our customers and also propose products that can address your specific challenges. Please feel free to consult with us.

"High-strength steel" is a type of steel material that has higher tensile strength and strength compared to general materials. Due to its properties, it allows for thinner wall designs in piping, enabling smaller diameters and reduced weight. This makes it a widely used joint material in various fields, including oil and gas pipelines. For some materials, we have stock of the steel pipes, allowing us to deliver relatively quickly, which has been well received by our customers. <Representative steel grades> API5L-X42(L290), X52(L360), X60(L415), X65(L450), corresponding to PSL1 and PSL2 classes. A860 WPHY42, A860 WPHY52, A860 WPHY60, A860 WPHY65, MSS SP-75 WPHY42, MSS-SP75 WPHY52, MSS-SP75 WPHY60, MSS SP-75 WPHY65.

Butt-welded pipe fittings are designed to permanently join piping by welding them together. The "BENKAN" brand, including BENKANKIKOH, is recognized globally as synonymous with welded pipe fittings, and we have absolute confidence in the quality that underpins this reliability. They are intended for general piping use with a temperature range of approximately 0 to 350°C and a pressure of about 1 MPa.

It is a joint that makes one think of a sculpture, finished to an impressive degree. This is made by "machining," which involves cutting from forged material rather than plastic processing. Among the welded pipe joints used in boiler-related applications at thermal power plants, there are products with large and special shapes that cannot be made through plastic processing (stretching, compressing, bending, or drawing steel materials). For such requests, we manufacture by cutting from forged material instead of using standard plastic processing. In terms of shape, there are mainly Y-PIECES that branch at the same angle from one direction, laterals that branch at an angle like a single branch from one direction, and T-PIECES that branch in a T shape. The diameters primarily range from 400 to 800 mm, with some larger ones weighing around 10 tons. Since these products are used under extremely harsh conditions, the specifications include strict component regulations for the materials used and heat treatment conditions based on the technical standards for power generation thermal equipment. We not only ensure that the shape is correct but also conduct UT tests on the materials, tensile tests on the products, impact tests, hardness tests, and penetration tests, and only provide the final product after all these tests are cleared.

At Benkan Kiko, we manufacture large-diameter seamless pipe fittings that connect to seamless steel pipes with an outer diameter exceeding 16 inches, utilizing our long-established plastic processing technology and quality assurance system. We can also accommodate various materials, including low alloy, high alloy, high-strength steel, and stainless steel.

Butt-welded pipe fittings are designed to permanently join piping by welding them together. The "BENKAN" brand is recognized worldwide as synonymous with welded pipe fittings, and we have absolute confidence in the quality that underpins its reliability. The surface is coated with zinc plating.

Butt-welded pipe fittings are designed to permanently join piping by welding them together. The "BENKAN" brand is recognized globally as synonymous with welded pipe fittings, and we have absolute confidence in the quality that underpins its reliability. These are seamless pipe fittings made from materials that can be used at high temperatures, low temperatures, and high pressures.

Steel products are easily corroded when left uncoated in the atmosphere, and rust occurs electrochemically due to oxygen and moisture in the air. It is possible to protect the products from corrosion and aging conditions by applying paint. Steel products used in plants and pipelines are particularly often painted, and at Benkan Kiko, we can supply products that have been painted or coated with customer-specified paints, thereby reducing the need for on-site painting work. For products that do not have special painting instructions, we apply temporary rust prevention that suppresses rust for about six months during indoor storage.

At the construction site of a plant where piping is installed, welding of pipe fittings to pipes and welding of pipe fittings to pipe fittings often must be carried out using approved welding methods (welding construction methods) based on regulations such as the Gas Business Act. Since there are many types of welding construction methods depending on the material of the pipes and the welding method, it is not always possible to accommodate all sites. Therefore, by pre-welding short pipes at Benkan Kiko, it becomes possible to align with the welding construction methods that can be used on-site. Benkan Kiko has obtained many welding construction methods based on regulatory requirements such as the Gas Business Act and the Electric Utility Act, allowing us to respond to various cases. Additionally, we can accommodate various shapes for guide bar installation according to customer requests, and we also offer the option to purchase materials for guide bars and sleeves from our company. We are qualified to conduct various tests and inspections on the welded joints of sleeves and guide bars, so please feel free to contact us.

Are you having any difficulties with the requirements for JSME application? If you have quality management requirements for JSME application but are unsure how to proceed, what kind of management is necessary, how to manage measuring instruments, what traceability management entails, how to create quality records, what welding methods are required if welding work is necessary, who the welders are, and other various concerns, please feel free to consult with us.

At Benkan Kiko, we provide high-quality products in response to our customers' requests, including butt-welded pipe fittings, the manufacturing of welded steel pipes, and piping prefabrication, thanks to our long-established management system in piping products (materials, welding, manufacturing processes, and quality assurance). ■ Welded Steel Pipes 　➢ Manufacturing Range 　　・Diameter: 400A (16B) to 1200A (48B) 　　・Wall Thickness: Up to 90mm 　　・Length: Short pipes up to 8,000mm (8000L) 　➢ Recommended Points 　　・No lot restrictions; we can manufacture from a single piece. 　　・Short pipes and random lengths can be produced. 　　・We can accommodate specified bevel shapes and special tolerances (prior consultation required). ■ Piping Prefabrication 　➢ Spoolable Range 　　・Spool Dimensions: 9000(w) x 2350(d) x 2000(h) 　➢ Recommended Points 　　・We offer centralized management through a single point of contact for welded steel pipes, pipe fittings, and piping prefabrication. 　　・The same construction method ensures consistent quality of the welds.

At Benkan Kiko, we also sell joint products that are not listed in the catalog. The image shows a special-shaped joint called a "Y-piece" for welded pipe joints. Its applications include use in boilers, heating furnaces, boiler tubes, and piping for heat recovery.

At Benkan Kiko, we also sell fitting products that are not listed in our catalog. The image shows a special fitting called a "cross" for welded pipe joints. For more details... please feel free to contact us!

■ White gas pipes for air conditioning equipment (FSGP coated products) ■ For cooling water piping ■ Stainless steel pipes for return lines in steam piping ■ Black gas pipes for steam and oil piping (FSGP products) Among others, we offer a wide range of welded pipe fittings in all these materials, with various sizes and wall thicknesses available in stock. They are used in large buildings, commercial facilities, hotels, factories, and other central air conditioning systems. Please feel free to contact us for estimates or inquiries.

The product we would like to introduce this time is the NBG joint, which has undergone cutting processing with zinc plating. When performing the peeling work of the zinc plating attached to the bevel area, conducting welding while leaving some plating can lead to the generation of harmful substances due to the thermal effects during welding. Therefore, there is a concern about the generation of harmful substances, and the peeling work creates a burden and hassle on-site. The NBG joint is a welded pipe joint from which the zinc plating attached to the bevel area has already been removed through cutting processing. As a result, it eliminates the process of peeling the plating before performing the surrounding welding work, removes concerns during the surrounding welding, and improves work efficiency. The NBG joint is mainly used in air conditioning equipment that creates a comfortable living environment and is active in various fields such as large building facilities and commercial establishments. Please consider the NBG joint, which can eliminate the peeling process and reduce concerns about harmful substance generation as well as the burden and hassle of peeling work. NBG stands for "Non Bevel Galvanized," which is a unique expression of Benkan Kiko.

Radiographic testing (RT) is a non-destructive testing method that allows for inspection without damaging the product, making it possible to examine invisible internal defects. RT is primarily conducted to detect defects in the longitudinal welds of joints and can be applied to products with wall thicknesses ranging from a few millimeters to over 100 mm. We can also accommodate products for which RT is required by regulations such as the Electric Utility Industry Law, the Gas Utility Industry Law, and the High-Pressure Gas Safety Law, as well as those requested by customers. Additionally, considering the test specimen and the defects to be detected, we implement appropriate testing by selecting and combining various methods, including penetrant testing (PT), magnetic particle testing (MT), and ultrasonic testing (UT), in addition to RT. We are also capable of responding to customer requests regarding various tests, so please feel free to consult with us.

Bulge forming (hydroforming) is a method of processing materials by applying high internal pressure and axial load (axial pushing) to tubular materials (such as steel pipes) placed within a mold, deforming them into shapes that conform to the mold. It is a type of plastic processing using various alloy steel pipes, including carbon steel, stainless steel, aluminum, copper, and brass. Using bulge forming offers the following advantages: 1. It allows for integral forming, making complex shapes possible. This improves the rigidity of the processed products and leads to enhanced quality. 2. It enables material thickening forming, allowing for right-angle bends in steel pipes, which can reduce processing time and increase processing speed. Thus, it is a forming method that not only allows for complex shapes but also enables cost reduction. Our company is capable of manufacturing welded pipe fittings, including T (tee), special T (tee) at 45° YT, crosses, laterals, and more. We also accept inquiries for welded pipe fittings tailored to customer needs in terms of material, diameter, and thickness, as well as for the production of special items, so please feel free to contact us.

The Y-pipe in the photo has a size of 4B, with a 30° (R300) elbow welded to the back side of a 1B short pipe, resulting in a special shape. Since SUS430 is in sheet form, both the elbow and the short pipe are manufactured by forming pipes from sheets. After shaping, the inner surface is polished to achieve a very smooth finish. Type: Special Y-pipe Dimensions: 4B x 1B Wall thickness: 3.0T Material: SUS430 This product is used in metal powder processing equipment and has received high praise from customers. In addition to the above, we are engaged in the production of various types and shapes of products, with many successful deliveries. "If only we could make such a joint!" or "It would be great to have such a joint." If you have such thoughts, please feel free to consult with us.

At Benkan Kiko, we own various testing machines for mechanical tests, including tensile testing machines, bending testing machines, impact testing machines, and hardness testing machines. Our manufacturing plants, Kiryu Plant and Osaka Plant, are equipped to conduct mechanical tests, allowing us to perform product manufacturing and associated mechanical tests within the same facility, thereby achieving high-quality product management and reducing lead times. Additionally, we conduct strict calibration of measuring instruments and manage calibration documents under traceability linked to national standards, so you can trust us with your needs. Mechanical tests can also be conducted in the presence of customers. Please feel free to contact us for more details. We take great pride in our "monozukuri" (manufacturing) and have received high praise for providing high-quality products to our customers. Eastern Japan Sales Division: 03-3777-1521 Western Japan Sales Division: 06-6482-1851

The core logistics center is located close to various transportation company terminals, providing excellent transportation efficiency. We have inventory items including carbon and stainless steel welded pipe fittings and stainless steel flanges as listed below. 【Inventory Items】 - Elbows (long and short) - Tees (same diameter and different diameter) - Reducers (concentric and eccentric), etc. - Stainless steel flanges 【Materials and Types】 - FSGP (black pipe and white pipe) - PT370 (S40, S80, S160) - SUS304, 316, 316L, etc. - SOP-FF/RF - BL-FF/RF, etc.

At Benkan Kiko, we manufacture a wide range of welded pipe fittings, from custom orders to mass production of standard products, including both domestic and overseas factories, to meet our customers' diverse needs. This time, we would like to introduce our stainless steel stub ends (also known as lap joints) produced at our Osaka factory. Regarding standards, we have molds that cover JPF, JIS, JPI, MSS, and ASME, and we can accommodate stainless steel types other than the commonly used SUS304 or SUS316L, with a manufacturing range from 1.5B to 12B. We can handle small to large lots and also offer short delivery times. Additionally, since we manage everything in-house from material cutting to shaping, heat treatment, and inspection, we have absolute confidence in our quality control. We can provide items tailored to customer specifications, from unique one-off pieces to mass production. Because we manufacture in our own factory, we can also accommodate requests such as "considering products with slightly different dimensions than the standard" or "if there were such stub ends..." So please feel free to consult with us.

Super 9Cr is a material that is difficult to handle even among alloy steels, but we have received this order as a leading company in the manufacturing of alloy steel pipe fittings with a proven track record worldwide. We can also accommodate the specifications of "small diameter and thick wall," which are challenging for plastic processing, so please feel free to contact us. We look forward to inquiries about what we can do! We will also consider manufacturing in the shape requested by the customer.

At Benkan Kiko, in addition to butt-welded pipe fittings, we also manufacture arc-welded steel pipes made of steel plates. There are no lot restrictions, and we can accommodate manufacturing in random lengths (any length specified by the customer). We can produce the desired number and length as requested by the customer, such as "I only need one 500L on-site." Additionally, we can also handle bevel processing (grooving) on both ends or one end, which may be difficult to do on-site, according to the bevel shape specified by the customer. By manufacturing in the specified shape, immediate piping installation after delivery becomes possible, and we have received positive feedback from our customers. 【Manufacturing Range】 - Diameter: 400A (16B) to 1200A (48B) - Wall thickness: up to 90mm (MAX.) - Length: from short pipes to 8,000mm (8000L) *For sizes other than those listed above, please inquire.

At Benkan Kiko, we have established four logistics bases to ensure smoother delivery of products requested by our customers: two locations in Gunma Prefecture (Kiryu Factory and Kiryu Branch Factory), one in Kanagawa Prefecture (Ashigara Logistics Center), and one in Hyogo Prefecture (Amagasaki Warehouse). This time, we would like to introduce the Ashigara Logistics Center in Kanagawa Prefecture, which manages the largest scale of shipments among these locations. The Ashigara Logistics Center specializes in the rapid dispatch of products, focusing on those with high market circulation, such as JIS standard items. Located in Minamiashigara City, Kanagawa Prefecture, it takes advantage of its suitable location near the Tomei Expressway IC to facilitate wide-ranging shipments from Hokkaido to Okinawa. We support same-day shipping (with the fastest delivery by the next day) and can accommodate a wide range of needs, including direct delivery by 4-ton and 10-ton trucks, as well as air freight, ensuring we meet various customer demands. For detailed inquiries regarding product shipments, please contact your sales representative.

Elbows are categorized into 90° elbows, 45° elbows, and 180° elbows according to JIS standards. In cases where these angles are insufficient for piping design, JIS standards recognize "special angle elbows," which can be manufactured at special angles as needed for piping design. Elbows manufactured at special intermediate angles such as 60°, 30°, and 135° are referred to as "special angle (end angle) elbows." At Benkan Kiko, we respond meticulously to our customers' requests and offer custom manufacturing of end angle elbows. **Benefits of adopting Benkan Kiko's end angle elbows:** - If elbows are processed on-site during installation, the product warranty for those fittings will be voided, so it is safer to manufacture them at the required angles in advance. - Processing elbows to specific angles or bevel ends on-site requires equipment and expertise, making it safer to use pre-processed products. - Products can be manufactured with dimensional accuracy based on JIS standards. - We can issue production drawings and delivery drawings that include detailed dimensions of the products as per your requests.

A stub end is a welded pipe fitting that has a flange at the end and is used in combination with a loose flange. Instead of rotating the pipe itself, the loose flange is rotated to freely adjust the position of the bolt holes, improving the workability on site during assembly. This product is used in a wide range of applications, primarily in low-pressure piping systems such as water supply and drainage facilities and internal factory piping. It is particularly effective in paper mills. In addition to standard products, we can also provide custom items tailored to your specifications, so please feel free to leave it to Benkan Kiko. We can accommodate products with flange diameters other than 10K, such as 5K and 20K, as well as products with dimensions that differ from standard specifications and serration processing. Leveraging the strength of our domestic manufacturing facilities, we respond flexibly to customer requests. "If you need a certain height" or "Can you make this flange diameter?" Please do not hesitate to reach out to us.