Jis Blind Flanges

Your Professional Jis Blind Flanges Supplier

Shanxi Hongkai Forging Co., Ltd. is located in China Energy Heavy Chemical Industry Base. Dingxiang County, the hometown of forging in Shanxi Province. Mainly produce flanges and forgings of various specifications. Application in piping installation, pressure vessel, equipment accessories.

Why Choose Us

Our Service
With strong technical force, advanced production technology, perfect quality inspection, and reliable after-sales service, it provides a basis for supervision and cooperation for many customers at home and abroad.

Our Certificate
The company Excellent Supplier of 2019 Safety production standardization certificate Quality management system certification.

Production Market
The products are mainly exported. It is exported to Europe, America and other countries and regions. The product quality is good, and the service is attentive. It is deeply appreciated and trusted by customers and users at home and abroad, and has won a high reputation. They have become one of the largest flange and forging suppliers in China.

Our Factory
Shanxi Hongkai Forging Co., Ltd. is located in China Energy Heavy Chemical Industry Base. Dingxiang County, the hometown of forging in Shanxi Province. Convenient transportation, abundant coal and power resources, fast communication and superior environment.

Advantages of Jis Blind Flanges

Sealing Performance:

Jis Blind Flanges provide a reliable seal, preventing leakage of fluid or gas from the piping system. This is especially important in applications where safety and environmental concerns are paramount.

Easy Installation and Removal:

Jis Blind Flanges can be easily installed and removed using bolts and nuts, making them suitable for applications where frequent disassembly is required.

Versatility:

Jis Blind Flanges are available in a wide range of sizes, pressure ratings, and materials, making them suitable for a variety of applications.

Cost-Effective:

Compared to other types of flanges, Jis Blind Flanges are relatively inexpensive, making them a cost-effective solution for closing the end of a piping system.

Technical Specifications

Parameter	Details
PN/CLASS	PN6 - PN40 / Class150 - Class2500
DN/INCH	DN10 - DN2000 / ½In - 24In / S.A 12In - 60In
Materials	CS (ASTM A105, P235GH, P245GH, P250GH, P265GH, ST37-2) / SS (ASTM A182, 304, 306)
Standards	ASME, EN, JIS, DIN, BS, KS, GOST, SABS, ATK
Surface Coating	Black paint, Galvanize, Grease, Epoxy paint

Installation Process of Jis Blind Flanges

Proper installation of a Jis Blind Flanges ensures a secure and leak-proof connection. Follow these steps:

Preparation:

Clean the flange faces and gasket to remove debris. Use a gasket compatible with the system's fluid and pressure (e.g., rubber or PTFE).

Alignment:

Match the bolt holes of the blind flange with the mating flange. Insert bolts and tighten them in a crisscross (star) pattern to distribute pressure evenly.

Torquing:

Apply consistent torque using a torque wrench, following the manufacturer's specifications. Over-tightening can damage the gasket, while under-tightening may lead to leaks.

Testing:

Conduct a pressure test to verify the seal. This step is crucial for high-pressure systems to identify potential weaknesses.

Application of Jis Blind Flanges

Various process material pipes connected to the boundary area outside the boundary area. When the device is parked, if the pipe is still in operation, a blind plate is placed at the shut-off valve.

When the device is in multiple series, the total pipeline from the boundary area is divided into several series, and the manifold is placed at the shut-off valve of each branch.

When the device is to be regularly repaired, inspected or switched to each other, when the equipment involved needs to be completely isolated, a blind plate is placed at the shut-off valve.

When the process pipeline of the pressurized pipeline or the replacement gas pipeline (such as nitrogen pipeline and compressed air pipeline) is connected with the equipment, the seesaw is installed at the shut-off valve.

The low point of equipment and pipelines is drained. If the process medium needs to be concentrated to a unified collection system, a blind plate is set after the valve is shut off.

The exhaust pipe, drain pipe and sampling pipe of equipment and pipeline should be provided with blind plate or wire plug after the valve. Except for non-toxic, non-hazardous and non-explosive materials.

Maintenance and Safety Considerations

Regular Inspection

Periodically inspect the Jis Blind Flanges for signs of wear, corrosion, or damage. Check the tightness of the bolts and the condition of the gasket.

Replace the gasket if it shows signs of deterioration or if it has been in service for an extended period.

Safety Precautions

When working with pipeline systems, always follow safety procedures. Wear appropriate personal protective equipment, such as gloves, safety glasses, and hard hats.

Be aware of the potential hazards associated with the fluid or gas in the pipeline, such as high pressure, high temperature, or toxicity.

FAQ

Q: What is the purpose of a blind flange?

A: Blind flanges may be used when testing pipe pressure, to create an access point in a piping system, to temporarily seal a piping system while modifying or repairing the line, or to create a long-term seal to terminate a piping system. A blind flange is bolted, rather than welded in place.

Q: What is the difference between JIS and BSPP?

A: JIS: The JIS standard specifies the pitch of metric threads, usually expressed in millimeters. BSP: The BSP standard specifies the pitch of the British thread, usually expressed in the number of threads (the number of threads per inch).

Q: Do blind flanges need gaskets?

A: Blind flanges are bolted to the piping system, and gaskets are often used to ensure a tight seal and prevent leaks.

Q: Do blind flanges have a schedule?

A: Blind Flange, 4", PVC Construction, Schedule 80, 150 PSI Maximum Internal Pressure Rating @ 73°F. PVC is the most commonly used plastic material for manufacturing plastic pipe. It has a relatively high tensile strength and module of elasticity.

Q: What pressure ratings do blind flanges have?

A: Blind flanges are designed to withstand various pressure ratings, such as Class 150, 300, 600, 900, 1500, and 2500, as per ASME B16. 5 standards. The pressure rating determines the flange's thickness and the number and size of bolts required.

Q: What is the function of JIS?

A: The Agency's main functions involves the gathering, production and dissemination of information on government policies and programmes, locally and overseas. To achieve its objectives, the Agency utilises a broad range of media skillsets: print, radio, television, graphic arts, video projection and public relations.

We're well-known as one of the leading jis blind flanges manufacturers and suppliers in China. If you're going to wholesale high quality jis blind flanges with competitive price, welcome to get more information from our factory. Also, customized service is available.

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