schedule 80 steel pipe fittings from China manufacturer

Price:	1.0~666.0 USD
Payment Terms:	T/T,L/C,WU
Place of Origin:	Hebei, China (Mainland)


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Product Detail

Model No.: DN150

Production Capacity: 1,118,000 Ton/Tons per Year

Delivery Date: 7 after receipt of advanced...

Shape: Equal

Type: Sight Glass

Connection: Male

WT: sch30

Means of Transport: Ocean,Land,Air

Packing: wooden cases or pallet or c...

Head Code: Hexagon

Technics: Others

Material: Carbon Steel

Brand Name: GEE

Large orders will enjoy a discount
Direct ManufactureOEM offerd
The perfect packaging and after-sales service Competitive price and stable delivery

Gaskets

To realize a leak-free flange connection gaskets are necessary.

Gaskets are compressible sheets or rings used to make a fluid-resistant seal between two surfaces. Gaskets are built to operate under extreme temperature and pressures and are available in a wide range of metallic, semi-metallic and non-metallic materials.

The principle of sealing, for example, is the compression from a gasket between two flanges. A gaskets fills the microscopic spaces and irregularities of the flange faces and then it forms a seal that is designed to keep liquids and gases. Correct installation of damage free gaskets is a requirement for a leak-free flange connection.

On this website gaskets ASME B16.20 (Metallic and semi-metallic gaskets for Pipe flanges) and ASME B16.21 (Nonmetallic flat gaskets for pipe flanges) will be defined.

On the Gaskets page you will find more details concerning types, materials and dimensions

Pressure Classes of Flanges

Forged steel flanges, according to ASME B16.5, are made in seven primary ratings:

150Lbs - 300Lbs - 400Lbs - 600Lbs - 900Lbs - 1500Lbs - 2500Lbs

The concept of flange ratings likes clearly. A Class 300 flange can handle more pressure than a Class 150 flange, because a Class 300 flange are constructed with more metal and can withstand more pressure. However, there are a number of factors that can impact the pressure capability of a flange.

The Pressure Class or Rating for flanges will be given in pounds. Different names are used to indicate a Pressure Class.
For example: 150 Lb or 150 Lbs or 150# or Class 150, all are means the same.

Example of Pressure Rating

Flanges can withstand different pressures at different temperatures. As temperature increases, the pressure rating of the flange decreases. For example, a Class 150 flange is rated to approximately 270 PSIG at ambient conditions, 180 PSIG at approximately 400°F, 150 PSIG at approximately 600°F, and 75 PSIG at approximately 800°F.
In other words, when the pressure goes down, the temperature goes up and vice versa. Additional factors are that flanges can be constructed from different materials, such as stainless steel, cast and ductile iron, carbon steel etc.. Each material have different pressure ratings.

Below an example of a flange NPS 12 with the several pressure classes. As you can see, inner diameter and diameter of the raised face at all the same; but outside diameter, bolt circle and diameter of bolt holes become larger in each higher pressure class.
The number and diameters (mm) of the bolt holes are:
Class 150 - 12 x 25.4, | Class 300 - 16 x 28.6, | Class 400 - 16 x 34.9, | Class 600 - 20 x 34.9, |
Class 900 - 20 x 38.1, | Class 1500 - 16 x 54, | Class 2500 - 12 x 73 |

china forged carbon steel ring gasket DN150 sch30

Size	DN150 sch30
Material	304 304L 316 316L 317317L
country of origin	China
Brand	GEE
technics	heat treatment
connect	welding
qualification	ISO9001/API/CE/BV/ABS/The famous trademark of china
Advantages	1) High quality and competitive price 2) Direct Manufacture 3) OEM offerd 4) Reliable supplier and good after-sales service 5)delivery in time. 6) year-round supply 7)Large orders will enjoy a discount
Surface Treatment	black rust-proof oil,transparent oil,hot galvanizing or as customer's special requirem
Application ranges	Petroleum, power, gas, metallurgy, smelting, foodstuff, papermaking, chemical,medical equipment, aviation, boiler heat exchangerand other fields.