Long Short Natural Gas Pipe Fittings , Black Iron Pipe Nipple Casting Technics

Synoptic table of black pipe nipples

3/4" Black Malleable Pipe Long Short Nipple Applicable Water Hexagon

1. DISA from Denmark ,DJ AMF Japan,SINTOKOGIO Japan have been applied into the malleable iron bushing to guarantee the quality of products.
   
2. The material’s quality of the cast steel sample needs to be examined by Oxford Instruments’s.
   
3. High heat value natural gas annealing oven will be applied to control the annealing operation and raise the material’s physical performance.
   
4. After air-tightness test,each bushing will be in the condition of no leakage.
   
5. We can strictly control the calibre,parallelism, angle and tooth type of the thread for every pipe fitting flange,because all of them need to pass the plug gauge test.

What’s the different of ductile iron , gray iron and malleable cast iron ?

The characteristic of ductile iron is very tough, graphite is in the form of a ball.

The feature of gray iron is very brittle , graphite is in the form of strip .

The particularity of malleable cast iron is graphite is a group of flocculent tiles .

So the ductile iron is hardest , malleable cast iron is harder than gray iron .

Correlation table :

25 Years Experience
Leyon steel also known as “China malleable”. For these 25 years, Leyon is always focusing on research and development of malleable iron fittings, grooved fittings, grooved couplings, tubing and valves that are mainly applied in such industries as fire protection, water supply, construction industry, municipal engineering and petrochemical.

Currently, Leyon is one of the largest pipe fittings manufacturers in the world, and is dedicated to provide secure, reliable and cost effective pipe fittings, with large products capacity, superior quality, strong R&D strength and first class service.

Our main production facilities include Sinto automatic molding line, automatic molding sand mixers from Germany, cupola furnaces, electric furnaces and more.

Leyon is also ISO 9001:2008-, BSI-, CCC-, UL- and FM-certified, furthermore, we were named as the Shanxi Famous brand.

Inquire Today
We look forward to cooperating with you in the near future. If you are interested in our products, please contact us. We expect to realize a win-win situation in our cooperation with your company.