Products
Polyethylene Pipe & Fittings
Overview
Polyethylene pipes and fittings are resistant to cracking, offer excellent processability and jointing, are lightweight, and corrosion-resistant. They also excel in cost-performance, offering many advantages. Shinwa Sangyo provides the Polyethylene conduit system manufactured by Mitsui Chemicals. As pioneers in polyethylene pipes, we are committed to delivering high-quality products and services. Through the development of products tailored to our customers’ needs, we contribute to the gas industry.
Features
Resistance to Cracking
Polyethylene is a flexible material and possesses excellent resistance against mechanical stress and external impacts.
Processability & Jointing
Polyethylene pipes can be joined using various methods, including heat fusion and electrofusion.
Lightweight & Corrosion Resistance
Polyethylene is lightweight, making it easy to handle, and it is chemically stable, making it resistant to corrosion.
Cost-Performance
They have a long lifespan, and the costs for installation and maintenance are low, making them economical in the long run.
Products & Specification
Pipes (JIS K6774)
Pipe No.1 (Pipe Color: Black)
Aspect ratio of thickness – SDR(Basic In-Diameter / Basic Thickness)=11.0
U Pipe No.1 (Pipe Color: Blue)
Aspect ratio of thickness – SDR(Basic In-Diameter / Basic Thickness) = 13.5
Pipe No.2 (Pipe Color: Orange)
Aspect ratio of thickness – SDR(Basic In-Diameter / Basic Thickness) = 17.0
Applicable for Medium Pressure B (Recommended)
B* When applied to Medium Pressure B, there are stricter temperature restrictions than for low pressure.
For the applicability of tools for Medium Pressure B and precautions in use, please check with the tool manufacturer.
Polyethylene Pipe’s Maximum Pressure by Temperature
The Application of Medium Pressure to Polyethylene Pipes.
The interpretation examples of ‘Technical Standards for Gas Work Products’ were revised as of March 31, 2003.
Based on this, the applicable pressure for polyethylene materials conforming to JIS (JIS K6774 Polyethylene Pipes for Gas, JIS K6775-1 to 3 Polyethylene Pipe Fittings for Gas) has been expanded to less than 0.3MPa (Medium Pressure B).
When applying polyethylene pipes to Medium Pressure B, please refer to the ‘Main and Branch Pipe Guidelines, Supply Pipe & Internal Pipe Guidelines (Medium Pressure Polyethylene Pipe Supplementary Edition)’ issued by the Japan Gas Association.
EF Fittings (JIS K6775-3)
Socket
(unit:mm)
Long Socket
(unit:mm)
One Side Socket
(unit:mm)
Different Diameter Socket
(unit:mm)
Different Diameter Elbow
(unit:mm)
90 degrees Elbow
(unit:mm)
90 Degrees One Side Elbow
(unit:mm)
45 Degrees Elbow
(unit:mm)
45 Degrees One Side Elbow
(unit:mm)
22.5 Degrees Elbow
(unit:mm)
22.5 Degrees One Side Elbow
(unit:mm)
Street Elbow
(unit:mm)
S Elbow
(unit:mm)
Angle-Adjustable Elbow
(unit:mm)
Japan Gas Association: Technical Award
Θ means the adjustable angle.
Cap
(unit:mm)
Tee
(unit:mm)
B* Medium Pressure B is available. When applied under Medium Pressure B, there are stricter environmental temperature restrictions than for low pressure. For the applicability of tools under Medium Pressure B and usage precautions, please check with the tool manufacturer.
Different Diameter Tee
(unit:mm)
Air Purge Tee
(unit:mm)
Saddle
(unit:mm)
Service Tee – Straight Type
(unit:mm)
Service Tee – Pipe Shaft Type
(unit:mm)
Repair Saddle
(unit:mm)
B* Medium Pressure B is available. When applied under Medium Pressure B, there are stricter environmental temperature restrictions than for low pressure. For the applicability of tools under Medium Pressure B and usage precautions, please check with the tool manufacturer.
Service Tee ( Same Diameter Branch)
(unit:mm)
(General Special Notes on Service Tees)
A slight gap is provided between the hole saw and the screw part of the service tee body to reduce the drilling torque. Due to this, bypass gas might be emitted from this gap after drilling and before removing the tapping tool and closing the service tee cap. Please be cautious during installation. For equal diameter branches of 50, 75, and 100, please use the clamps indicated below.
To apply to same branch 50, 75, and 100, use the following clamp.
Saddle Clamp 50:
ED-50 (Matsuzaka Manufacturing)
313221 (REX INDUSTRIES )
Saddle Clamp 75:
ED-75 (Matsuzaka Manufacturing)
313222 (REX INDUSTRIES )
Saddle Clamp 100:
ED-100 (Matsuzaka Manufacturing)
313223 (REX INDUSTRIES )
Service Tee (Same Diameter Branch 150, 200)
(unit:mm)
Use dedicated tools to apply.
Japan Gas Assosiation: Technical Award 2017
Bypass Saddle
(unit:mm)
The standard product comes with a hole saw specification. However, there is also a seal plug specification (marked with an ‘S’). Please specify when placing an order.
B* Medium Pressure B is available. When applied under Medium Pressure B, there are stricter environmental temperature restrictions than for low pressure. For the applicability of tools under Medium Pressure B and usage precautions, please check with the tool manufacturer.
Ball Valve
(unit:mm)
B△: Applicable for Medium Pressure B. However, a separate inspection is required.
B☆: During application to Medium Pressure B, it may be unsuitable for Medium Pressure B depending on the environmental temperature used.
For the applicability of tools under Medium Pressure B and precautions in use, please check with the tool manufacturer.
Ask us about the medium-pressure B when ordering
This product is a joint development of Mitsui Chemicals Production & Resources and Daiming Metal Industry.
※ The valve is equipped with a stopper for its open/close position. In case of mishandling (excessive force when operating the valve), the structure is designed to break the stopper to prevent damage to the valve body. To prevent mishandling, always use the dedicated valve opener rod when operating. (Even if the stopper breaks, it will not affect the opening/closing operation or the fluid shearing performance.)
Ball Valve Diagram -A Location that Bears the Weight
Ball Valve Diagram -A Location that does not Bear the Weight
Transition Fittings
Straight for Steel Pipe
(unit:mm)
Straight for Cast Iron Pipe TM
(unit:mm)
Straight for Cast Iron Pipe GM
(unit:mm)
Mechanical Straight
(unit:mm)
Female Thread Elbow
(unit:mm)
Mechanical Elbow
(unit:mm)
Service Tee
(unit:mm)
Valve Tee
(unit:mm)
Water Trap
Water Trap Fitting
(unit:mm)
The water trap is used at a maximum operating pressure of less than 0.1 MPa.
Tools
The MMS Recommended Tool System:
Mitsui Chemicals Production & Resources Inc. and Sekisui Chemical Co., Ltd. have established certain evaluation criteria for tools used in the piping work of polyethylene pipes and fittings for gas. Tool manufacturers display a recommendation mark in catalogs and leaflets for tools that meet these evaluation criteria.
Socket Clamp
- 20A ‣ 30A (Rex Industries)
- 50A ‣ 75A (Rex Industries)
- 75A ‣ 100A (Rex Industries)
- 100A ‣ 150A (Rex Industries) – ①
- 150A ‣ 200A (Rex Industries)
Tee Clamp
- 25A ‣ 30A (Rex Industries) – ②
- 50A ‣ 75A (Rex Industries) – ③
- 75A ‣ 100A (Rex Industries) – ④
Elbow Clamp
- 50A ‣ 75A ‣ 100A (Rex Industries) – ⑤
(Use for Socket, Elbow, Tee) - 30A / 50A Dual-Use (Rex Industries) – ⑥
To extract service tees (shaft type) – otional liner for 25A is available - 150A / 200A (Rex Industries) – ⑦
- 150A / 200A (Matsuzaka Cast Steel) – ⑧
Saddle Clamp
- 50A, 75A, 100A (Matsuzaka Cast Steel) – ①
- 50A, 75A, 100A (Rex Industries) – ②
- 50A, 100A (Rex Industries) – ③
Saddle Scraper
- Drive Unit: 50A – 200A – ①
- Casing Unit: (Omi Industry)
50A, 75A, 100A, 150A, 200A – ② - Plane (Rex Industries) – ③
- Plane Replacement Knife (Rex Industries) – ④
- Saddle Scraper (Rex Industries) – ⑤
Socket Scraper
- Scraper: (OSAKI PRECISION) – ①
50A, 30A, 50A, 75A - Scraper: (OHOKA SEISAKUSHO) – ②
25A, 30A, 50 – 100A, 150A ‣ 200A - Large-Diameter Manual Scraper: (Nishiyama) - ③
100A – 200A - Turn Shaver: (OSAKI PRECISION) – ④
75A‣100A, 150A‣200A
For the equal diameter branch 100, after fusion, cutting of the spigot section is not allowed.
Cold Tapping Tool
- Body 25 – 50A, 75A – ①
- Tapping Knife 25A, 30A, 50A, 75A – ②
- Ratchet Wrench – ③
- Chip Removal Rod (Punch) (Rex Industries) – ④
Air Leakage Test
- Air Stopper: – ①
25A ‣ 30A, 50A, 75A 100A , 150A, 200A - Air Leak Tester – ②
- Hose End Adapter (Rex Industries) – ③
When using a manometer for the airtightness test and for air purging
Service Tee Tapping Tool
25A:
- Straight Connection Type (Rex Industries)
30A:
- Straight Connection Type (Rex Industries)
- Pipe Shaft Type (Rex Industries) & (OHOKA SEISAKUSHO)
50A:
- Straight Connection Type (Rex Industries) & (OHOKA SEISAKUSHO)
- Pipe Shaft Type (Rex Industries) & (OHOKA SEISAKUSHO)
75A‣100A Dual-Use
- Pipe Shaft Type (OSAKI PRECISION)
For 30A and 50A, there are tube straighteners that are also usable for tube axes (made by Rex and Ohoka Seisakusho Works).
Pipe Cutter
- Pipe Cutter (Rex Industries) & (Matsuzaka Cast Steel) – ①
25A‣30A, 50A‣75A, 75A‣100A, 150A‣200A - Ratchet-Style Single-Blade Cutter – ②
- 75A‣100A (Rex Industries)
- 15A‣200A (Matsuzaka Cast Steel)
Squeeze Off Tool (Izumi Seiki Manufacturing)
SO-1:
- Diameter: 25A‣30A
- Size (Width x Height) : 176 x 276 mm
- Weight: 5.4kg
- System: Hydraulic Separated
SO-2:
- Diameter: 25A – 50A
- Size (Width x Height) : 234 x 699 mm
- Weight: 13.5kg
- System: Hydraulic Integrated
SO-3:
- Diameter: 25A – 50A
- Size (Width x Height) : 234 x 405 mm
- Weight: 10.5kg
- System: Hydraulic Separated
SO-4:
- Diameter: 50A – 100A
- Size (Width x Height) : 293 x 581 mm
- Weight: 21.0kg
- System: Hydraulic Separated
Note: “Separated” refers to a design where the hydraulic pump and hose parts are separate.
- Pipe Support Stand (Rex Industries) – ①
- Water Shut-Off Valve (Prime Industries) – ②
50A, 75A, 100A, 150A, 200A - Cold Ring (Rex Industries) – ③
25A, 30A, 50A, 75A, 100A, 150A, 200A