Last Updated： Aggregation Period:Jun 03, 2026～Jun 30, 2026
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Jun 03, 2026～Jun 30, 2026
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Jun 03, 2026～Jun 30, 2026
This ranking is based on the number of page views on our site.
1111～1140 item / All 2038 items
We are introducing hydraulic hoses and resin hoses, among others.
Maruyama Sangyo Co., Ltd. offers a range of industrial rubber products, including general belts and hoses, various automotive parts, agricultural machinery, industrial machine components, and various corrosion-resistant linings tailored to specific applications. For more details, please contact us or refer to our catalog.
PVC elbow with a flange, 90° 13, is a special fitting for internal piping in septic tanks. It can be connected using adhesive for PVC pipes.
The special fittings are PVC fittings for the internal piping of the sewage treatment tank. PVC pipes can be connected with adhesive.
Sealed, durable fluororesin fittings resistant to repeated use and aging.
We also offer a variety of custom-made options, so please feel free to consult with us.
You can make CGA and DISS fittings easier to use and convert them to JIS standard fittings!
We accept the production of conversion fittings using various standards from around the world. - CGA - DISS - JIS - DIN (Germany) - BS (United Kingdom) - AFNOR (France) Please feel free to contact us for any combination.
This is a vacuum piping component for the water-cooled and gas introduction machine of the Conflat ICF series.
This product comes with an adapter attached to the flange and is available for immediate delivery. We respond to the urgent requests from the field side by providing various types of piping in an immediate delivery system. For more details, please contact us or refer to the catalog.
6kV to 24kV DC, ceramic minimum inner diameter Φ5 to maximum inner diameter Φ135.
Insulating insulators and insulating joints are ceramic joints designed to insulate both ends. Please choose the optimal item from a rich lineup ranging from 6kV to 24kV DC, with ceramic minimum inner diameters of Φ5 to maximum inner diameters of Φ135. In addition to standard types, we also offer insulated flanges with welded bellows for use in vibration absorption and alignment adjustment, which are standardized. For connection joints, please select the optimal specifications and sizes from tube ends, Swagelok(R), VCR(R) female, VCR(R) male, NW/KF, ISO-Tapered(R) [NW 80 and above], ICF, JIS-VF, and JIS-VG. We also respond quickly to custom orders such as changes to joints, flanges, and dimensions. For more details, please contact us or refer to the catalog.
We would like to introduce special products of welded pipe fittings.
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.
Introducing a special-shaped lateral product manufactured and sold by Benkan Kiko!
A lateral is a welded pipe fitting that generally branches off at an angle in a Y-shape from the side of the main body. Although it is too thick and has a special shape to be called a "pipe," we have a wealth of sales experience with such specialized products. At Benkan Kiko, we accommodate various shapes of products according to our customers' needs.
Introducing the processing procedure for seamless reducers for piping fittings in a video.
■Content■ You can watch a video on the manufacturing method of seamless reducers for piping fittings using the steel pipe outer die method. Please click on the "Related Links" below the contact button.
At Benkan Kiko, we manufacture welded pipe fittings made of duplex stainless steel.
The material commonly referred to as duplex stainless steel is characterized by its high resistance to corrosion and greater strength compared to austenitic stainless steel. This allows for thinner design plate thicknesses, leading to advantages such as weight reduction, downsizing due to increased flow rates, and cost reduction in piping. At Benkan Kiko, we utilize our long-established metal forming technology and quality assurance system to provide high-quality duplex stainless steel welded pipe fittings, assisting our customers with their piping design and cost reduction. Please feel free to contact us with any questions or inquiries. Project Sales Department, Eastern Japan Sales Division TEL: (03) 3777-1521 / FAX: (03) 3777-1567 Project Sales Department, Western Japan Sales Division TEL: (06) 6482-1581 / FAX: (06) 6482-1824
![Welded pipe fittings for piping [nickel-based alloy]](https://image.mono.ipros.com/public/product/image/ec2/2000155979/IPROS51599222530472128576.jpeg?w=280&h=280)
At Benkan Kiko, we also manufacture fittings made from nickel-based alloys.
At Benkan Kiko, we have a wealth of experience in metal plastic processing technology, allowing us to manufacture joints made from nickel-based alloys, which are difficult to shape, and we have many achievements in this area. Nickel-based alloys are used as heat-resistant and corrosion-resistant materials, and due to their high strength, they are also suitable for use in high-temperature environments. The nickel-based alloy joints that can be manufactured at Benkan Kiko include the following steel grades: ASME UNS NO N10276, N06022, N10655, N06210, N02200, N02201, N06625, N08020, N06002, N06601, N06230, N08800, N08810, N06600, N08825, N06690.
We are capable of manufacturing ultra-large diameter welded pipe fittings exceeding 48 inches (1200A).
At Benkan Kiko, we provide high-quality products by manufacturing them using our long-developed welding technology and quality assurance system, assisting our customers in achieving cost reductions in their plant piping design. The product we are introducing this time is a super large diameter welded pipe fitting exceeding 48 inches (1200A).
Su pipe fittings (JIS B 2309 stainless steel butt-weld pipe fittings for general piping) can be delivered in a short time due to inventory availability.
Su fittings (JIS B 2309) are manufactured primarily for use in general water supply and hot water piping in hotels, apartments, hospitals, building construction, and factory piping. They are characterized by their thin-walled design compared to butt-welded pipe fittings manufactured under JIS B 2311 and JIS B 2312, which allows for cost reduction. Additionally, considering the automatic welding during installation at the piping site, the bevel is designed as a plain end. The maximum operating pressure is set at 2.0 MPa, and due to the thin wall thickness, even small diameter fittings feature a wide inner diameter, ensuring sufficient flow capacity. Benkan Kiko holds JIS B 2309 Su fittings in stock, allowing for relatively short delivery times. <Stock Range> Types: 90EL 45EL 90ES R(C) R(E) T(S) T(R) LJSE Sizes: 30Su to 300Su
For alloy steel fittings for piping, please consult Benkan Kiko, the number one in domestic achievements.
Alloy steel fittings for piping contain elements such as Cr (chromium) and Mo (molybdenum), and are primarily used for main piping and reheating piping in boilers, biomass power generation, thermal power generation, as well as high-temperature and high-pressure piping in petroleum refining and chemical industries. Benkan Kiko has a proven track record in the manufacturing of various alloy steel fittings. Additionally, for some materials, we have stock of the steel pipes required, allowing us to deliver relatively quickly. Achieving a carbon-neutral society necessitates reducing CO2 emissions through increased efficiency in plants. Low-alloy steel and high-chromium steel pipe fittings that can withstand harsh high-temperature process environments have become essential products under such conditions. Furthermore, Benkan Kiko is also contributing to society by exploring the manufacturing of special specifications and new materials. <Representative Steel Grades> (JIS Standards) PA12, PA22, PA23, PA24, PA25, PA26 (Thermal Power Standard Materials) Fire STPA28, Fire STPA24J1, Fire STPA29 (ASME/ASTM) A234WP1, WP12, WP11, WP22, WP5, WP9, WP91, WP92
For piping fittings made of "high-tensile steel," please contact Benkan Kiko.
"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.
Benkan Kiko provides piping materials that meet the requirements of nuclear power management.
Benkan Kiko has a wealth of delivery experience in welded pipe fittings for all nuclear power plants in Japan. Utilizing our expertise in stringent quality control for nuclear applications, as well as the management of documentation and quality records, and the technology for long and circumferential welds on items subject to inspection by welding contractors, we manufacture not only items subject to such inspections but also prefabricated piping that requires nuclear management, which has a significant track record for the necessary remedial work for the recent restart of nuclear power plants. In particular, we produce and deliver prefabricated piping that combines fittings, flanges, nozzles, and nipples for fire protection piping, which traditionally does not require nuclear management, and we also conduct strength calculations for these flanges, nozzles, and nipples based on JSME (Japan Society of Mechanical Engineers) standards. We can manufacture using both stainless steel and carbon steel (galvanized), and we also respond to various other requests.
Clad steel generates benefits in various cases, such as reducing overall piping costs and accommodating materials that can only be purchased in rare materials or thin plates.
Clad steel refers to a composite material that uses carbon steel, high-strength steel, low-alloy steel, etc., as the base material, and combines it with a different type of steel on one side through processes such as hot rolling (bonding), welding, or explosive bonding. By enabling the joining of dissimilar metals, it can create functions that cannot be achieved with a single type of metal. By combining materials with good corrosion resistance or by using less expensive metals in combination with more expensive ones, it is also possible to reduce the overall cost of piping. This type of steel offers advantages in various cases, such as accommodating rare materials or materials that can only be purchased in thin sheets. *The photo shows a cross-section of clad steel, where the combination of dissimilar metals can be seen.
We will solve your problems related to the procurement of nuclear management materials applicable to JSME (Japan Society of Mechanical Engineers) standards.
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.
Benkang Kiko can handle the materials and difficult thick-walled plastic processing required for thermal power plants!
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.
We also manufacture pipe fittings made of aluminum alloy that are suitable for low temperatures and resistant to corrosion.
Please use Benkan Kiko's aluminum alloy butt-welded pipe fittings around the tanks for LNG carriers. Benkan Kiko has obtained qualifications from many classification societies and can manufacture elbows, tees, reducers, caps, as well as sleeves and bell mouths through a combination of plastic processing and welding. We are compliant with the following classification societies: 1. Nippon Kaiji Kyokai (NK) 2. Bureau Veritas (BV) 3. Lloyd's Register (LR) 4. American Bureau of Shipping (ABS)
Instead of machining, we can reduce costs by manufacturing from seamless pipes!
In the variety of welded pipe fittings, elbows, Ts, and reducers are common, but fittings that have branches on the top and bottom resembling a T are referred to as crosses due to their cross-shaped design. This type of pipe fitting is not specified in JIS standards and is mostly manufactured by machining from forged materials. However, Benkan Kiko is capable of producing them using the bulging method (hydraulic forming) from seamless pipes. The machining method tends to result in heavier weights and often produces angular shapes, which can make welding at construction sites difficult. Additionally, the method of machining from a solid block requires a significant amount of material, leading to higher material costs and increased processing costs. Manufacturing through shaping from seamless pipes allows for smooth shapes, uniform wall thickness, and lighter product weights, while also achieving cost reductions. This cost advantage becomes more pronounced with high-cost materials such as stainless steel and non-ferrous metals like nickel, resulting in significant benefits. For more details, please feel free to consult our sales office.
Welded pipe fittings from Benkan Kiko are also used in LNG transport vessels.
We have the technical capabilities and experience to accommodate various ship classifications, and we respond not only to the specifications required by classification societies but also to a wide range of additional requests tailored to our customers' needs.
Special coating application for pipe fittings is available according to customer requests.
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.
We manufacture welded pipe fittings from clad steel plates that are bonded with two types of materials to meet your requirements.
Large-diameter welded pipe fittings are typically manufactured from carbon steel plates, alloy steel plates, and stainless steel plates, each from their respective materials. What we are introducing this time is a T (tee) welded pipe fitting made from a plate of WPHY60 steel with a thin steel plate of UNS8825 bonded to the inside. In addition to general carbon steel and stainless steel, it is possible to manufacture from a variety of materials, including low alloy steel, high alloy steel, duplex stainless steel, super stainless steel, aluminum, nickel, and high-strength steel. Among these diverse materials, it is also possible to manufacture from clad steel plates, which combine two types of materials. Furthermore, production from seamless materials or overlay (build-up) materials that are not steel plates is also possible.
![[Case Study] Welded Pipe Fittings Made of Stainless Steel for General Piping in Hydroelectric Power Plants](https://image.mono.ipros.com/public/product/image/de2/2000404921/IPROS22724521797292153856.jpeg?w=280&h=280)
You have adopted welded pipe fittings made of stainless steel with excellent corrosion resistance.
The river water around the Yonago River No. 1 Power Plant in Suzaka City, Nagano Prefecture, has a strong acidity with a pH of 3.23, making it unsuitable for agricultural use and as a habitat for fish. However, in order to effectively utilize resources and contribute to the community while ensuring environmental conservation through profit return, the establishment of a hydroelectric power plant was initiated. In this context, we were approached through the Ipros site, and we had the opportunity to visit the site. We had detailed discussions to propose products that our company could assist with. As a result, we were evaluated positively for our extensive delivery track record to power plants, quality and inspection systems, and our ability to create documentation, leading to our adoption. The welded pipe fittings we supplied this time are made of stainless steel, model 90-45EL, material SUS304W, sizes 600A and 400A, with a thickness of S10S. We believe that stainless steel, which is highly resistant to corrosion, is essential for the river water with strong acidity used in hydroelectric power plants. In this way, Benkan Kiko's welded pipe fittings are used in various places.
We are confident in our stable supply! For shipbuilding pipe fittings, trust Benkan Kiko. From JIS standard products (small diameter to large diameter) to marine classification products, leave everything to us.
Benkan Kiko has absolute confidence in product quality, whether it involves unique items or those requiring mass production for shipbuilding pipe fittings. We will certainly meet our customers' expectations for stable supply, not only for ship classification products but also for JIS standard products (from small to large diameters). We also accommodate materials from the following five classification societies: 1. Nippon Kaiji Kyokai (NK) (e.g., KSTPT38, KSUS316LW, etc.) 2. Bureau Veritas (BV) (e.g., BV360, etc.) 3. DNV GL (e.g., TS360, GL360, etc.) 4. Lloyd's Register (LR) (e.g., LR360, etc.) 5. American Bureau of Shipping (ABS) (e.g., ABS 4, etc.) Please feel free to consult with us.
Leave the welded pipe joints with radiographic testing (RT) to 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.
For those looking for short delivery items of large-diameter steel plate butt-welded pipe fittings (PY400).
Have you ever experienced difficulty when trying to purchase PY400 and found that the required timing and delivery period did not match? We have wholesalers among our business partners who stock PY400. The stock range is from nominal diameter 400A to 1000A and nominal thickness from 7.9mm to 12.7mm. Based on data obtained from years of production experience, we have established an immediate delivery system for sizes with a certain frequency of use. Additionally, our wholesalers have warehouses in two locations, one in Osaka to the west and one in Tokyo to the east, which allows for a delivery system that does not limit the delivery location. If you are having trouble with the delivery time for PY400, please feel free to consult with Benkan Kiko.
Are welded pipe fittings related to the RoHS directive? What about the certification?
What is the RoHS Directive? The RoHS (Restriction of Hazardous Substances, commonly known as RoHS) Directive is a directive enacted by the European Union (EU) in July 2006 that restricts the use of certain hazardous substances in electrical and electronic equipment. The RoHS Directive aims to ensure that electrical and electronic equipment does not contain hazardous substances, primarily to facilitate recycling under the WEEE Directive and to prevent harm to humans and the environment when such equipment is disposed of through landfill or incineration. Based on the official gazette published in June 2015, it has been decided that, starting from July 2019, four new types of phthalate esters will be added as restricted substances. *The WEEE (Waste Electrical and Electronic Equipment, commonly known as WEEE) Directive is a directive by the European Union (EU) concerning waste electrical and electronic products.
![[Special Item] Manufacturing of fittings with special shapes](https://image.mono.ipros.com/public/product/image/810/2000479803/IPROS09083386513252247963.jpeg?w=280&h=280)
At Benkan Kiko, we are capable of manufacturing various shapes of special products thanks to our long-standing expertise in joint manufacturing. This time, we would like to introduce one such example.
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.
