大一商会 List of Products and Services

This catalog contains the welded pipe fitting products of Benkan Kiko Co., Ltd., which we handle. It includes dimension tables for elbows, reducers, caps, and more, as well as excerpts from JIS steel pipe standards regarding standard thickness and materials for welded pipe fittings, and excerpts from ASTM standards. [Contents (excerpt)] ■ Types of welded pipe fittings ■ Dimensional tolerances for welded pipe fittings ■ Standard thickness for welded pipe fittings ■ Material symbols for welded pipe fittings ■ Marking of welded pipe fittings *For more details, please refer to the PDF document or feel free to contact us.

• Fittings

We handle a wide range of products from Awaji Materia Co., Ltd. In the "Welded Pipe Fitting Catalog," we feature items such as the "90° Elbow," "45° Elbow," and "T (Tees)." Additionally, we provide information on factory introductions, factory qualifications, types of pipe fittings, and processing technologies. [Contents (excerpt)] ■ Company Overview ■ Product Introduction ■ Machined Products ■ Fe-Mn-Si Alloy Application Products, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Fittings

Our company handles a wide range of products from MIE Tech Co., Ltd. The "Stainless Steel/Butt-Welded Pipe Fitting Catalog" features products that meet your needs with stable quality, comprehensive process management, service systems, and a wide range of dimensions. We offer a lineup that includes "Elbows [E]", "Tees [T]", and "Reducers [R]", among others. [Contents (Excerpt)] ■ Company Overview ■ Major Production Facilities and Equipment ■ Certifications Held ■ Manufacturing Process of Butt-Welded Pipe Fittings ■ Stainless Steel/Butt-Welded Pipe Fittings for Piping, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Fittings

The "8-Sided Screw Joint" handled by Daiichi Shokai is a new type of stainless steel screw joint that meets customer needs. It minimizes damage and scratches at the tightening section, which are common in conventional piping work. Additionally, it allows for easy tightening in narrow spaces, significantly reducing work time. 【Specifications (excerpt)】 ■ Applicable Standards … Complies with JIS B 2308 (Standards for stainless steel screw joints) ■ Material … SCS13A, SCS14A ■ Size … 6A to 100A (The 8-sided type is available up to 50A, and from 65A it becomes a round band type) ■ Applicable Fluids … Steam, air, gas, water, oil, etc. ■ Installation Tools … Compatible with commercially available spanners and monkey wrenches *For more details, please download the PDF or feel free to contact us.

• Piping materials (copper pipes, cast iron pipes)
• Piping and electrical wiring materials
• Fittings

Our company is a comprehensive piping materials enterprise that wholesales piping components used in industrial complexes, manufacturing plants, and construction sites. To accommodate various business environments of our customers, we maintain a rich inventory of items such as "flanges," "welded joints," "screwed joints," "high-pressure joints," "valves," and "pipes." This document provides a detailed introduction to our lineup of "flanges." It covers a wide range of information from how to install basic flanges onto pipes to the dimensions of each product. [Contents (excerpt)] ■ Classification of JIS flanges ■ How to install basic flanges onto pipes ■ Standard thickness of connecting steel pipes ■ Material standards for flanges ■ Dimensional tolerances for flanges, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Piping Equipment

The "8-Sided Screw Joint" is a new type of stainless steel screw joint designed to meet customer needs. It can reduce scratches that occur on the tightening part during conventional piping work. Additionally, it alleviates the difficulty of tightening work in narrow spaces, leading to a reduction in work time. 【Specifications (excerpt)】 ■ Conforms to JIS B 2308 standards for stainless steel screw joints ■ Applicable fluids - Steam - Air - Gas - Water - Oil, etc. *For more details, please download the PDF or feel free to contact us.

• Piping materials (copper pipes, cast iron pipes)
• Piping and electrical wiring materials
• Fittings