First, the raw materials:
Expandable graphite (flexible graphite) is chemically treated with pure natural graphite and treated at a high temperature of 1000 ° C. This material provides excellent heat resistance and chemical resistance, and it can make the gasket highly elastic and low ductility. feature.
Second, the characteristics:
1. The sealing performance remains almost unchanged in the high temperature range from extremely low temperature to 400 °C.
2. Excellent chemical resistance for almost all liquids (except strong oxidizing acid, etc.)
3. Due to the cold deformation and ductility, the installation is too tight and has no effect on the gasket.
Third, type:
Flexible graphite gaskets are cut from flexible graphite sheets (or with metal reinforcement) and are divided into four types depending on the application:
1, T / # 1200 flexible graphite gasket: cut from flexible graphite sheet, used for pipe flanges and bonnets. It is recommended that these gaskets be small diameter gaskets depending on their low mechanical strength.
2. T/#1210 flexible graphite gasket MI: The hooked carbon steel sheet (0.2 mm thick) is sandwiched between flexible graphite sheets and then cut into specific dimensions with high mechanical strength.
3, T / # 1215 flexible graphite gasket PM: flexible graphite sheet is adhered to both sides of a 0.2 mm thick 304 stainless steel sheet, has high mechanical strength and is easy to transport, because it can also be cut into complex shapes, Such gaskets are widely used in various industries.
4. T/# 1215-a flexible graphite gasket PM-a: Replace the stainless steel sheet in T/#1215 with 316 steel (50 microns).
Fourth, the application:
It is used in various industrial pipe flanges, heat exchangers, bonnets, etc., as well as special shape flanges on liquid level gauges and level gauges.
We can produce the Boiler Pipe accordng to the ASTM A335 and ASME SA335 standards, such as the P11 Steel Pipe, P12 steel pipe, P22 steel pipe, P91 steel pipe, P92 steel pipe, P5 steel pipe, P9 steel pipe and P36 steel pipe. Yangzhou Chengde have been sold about 700000 MT boiler pipe to the world in recent 10 years and we share the 70% of export boiler pipe in china.
In the year of 2015, we win the first prize of National Science and Technology Progress Award by the program of [The innovative research & development, and application of steel pipes used in 600 ℃ Ultra-super critical coal power generation unit".
YC has been granted a number of approval certificate by international institutions, such as ASME Nuclear pipe certificate, China Nuclear HAF certificate, 914mm Cylinder certificate, API monogram and certificate, ISO9001 by TUV NORD, ISO14001/OHSAS18001 by CQC, approvals from Shipping Classification Bureaus like DNV, RINA, ABS, Lloyd, GL, Bureau Veritas, and permit of exporting to Europe as PED 2014/68/EU and AD 2000 certificates for pressure pipes, CPD (Construction Products Directive), etc. and these certificates support the development of international sales market.
P11 Pipe,Astm A335 Pipe,P12 Pipe,P92 Pipe
YANGZHOU CHENGDE STEEL PIPE CO.,LTD , https://www.chengdepipe.com