Slip-on welding flange

Type of Flange:

Slip-on welding flange, Welding neck flange, Threaded flange, Socket welding flange, High-pressure flangem, Lap joint flange

Standard of Flange:
American Standard Series:
ANSI B 16.5 ANSI B 16.47 API 605 MSS SP44 ANSI B 16.36(ORIFICE FLANG)

German Standard Series:

6bar 2573,2527,2631
10bar 2576,2527,2632
16bar 2543,2527,2633
25bar 2544,2527,2634
40bar 2545,2527,2635

Japanese Standard Series:
KS B1503 JIS B2220 JIS B2238
British Standard Series:
BS 1560 BS 4504 BS-1
Material specifications:
Carbon steel: ASTM A 105,
Low alloy steel: ASTM A 182 Grade F1, F5, F6, F9, F11, F12, F21, F22, F91, F92;
Stainless steel: ASTM A182 304,304H,304L,310,316,316H,316L, F317,F317L, F321,F347;
Dimensions and Rate:
DN15-DN1500
Standard ratings: 150, 300, 400, 600, 900, 1500 and 2500
Type of sealing surface: FF RF RJ M F MF T G TG

Hangzhou Hitech Petrochemical Equipment Co., Ltd. founded in 2001, is a high-tech production enterprise specializing in design, development and manufacturing of all kinds of tower internals, packings, and tower plates, Oil pipeline, seals, valve etc.We have passed ISO9001 quality management system certification, with the right to import and export. In addition, we have cooperated with the colleges and universities, and innovated scientific research units at home and abroad since the 1900s, successively innovated several series of products, and won over 30 national patents, and been awarded as a county-level patent demonstration enterprise. At present, we mainly serve some major engineering companies at home and abroad, and possess manufacturer qualification designated by the engineering companies in Japan and other countries.

Production equipment: full-automatic production line and degrease equipment exist in the structured packing and random packing, the manufacturing workshop in the tower internals owns first-class equipment and manufacturing level in China, and we mainly serve and support the large foreign engineering companies.

The best quality, reasonable price, and perfect service are our forces in fierce market competition. 

Our products sell well in the fields such as fertilizer, chemical industry, oil, sulfuric acid, environmentally-friendly power,coking and pharmaceuticals. and our products are exported to the United States, Japan, Germany and other countries.  We have won praises and trusts from new and old customers.