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Flange Face Repair

HTS aims to meet customers' needs and expectations with perfect technology, excellent quality and thoughtful service. At present, HTS has carried out on-site machining services such as flange face repair, pipe cutting and grooving, three-coordinate milling, on-site drilling, diamond wire cutting and so on.

Machinable dimensions: DN10-DN3000.

Can be used for machining and repairing all types of flange surfaces (plane, convex surface, concave-convex surface and groove surface), sealing surfaces and heat exchanger flanges (special machining tools can be equipped under special working conditions).

Machinable materials, such as cast iron, carbon steel, alloy structural steel, stainless steel, aluminum and other metal materials.

Machining precision surface roughness Ra0.8μm -12.5μm within the scope of switching.

The plane accuracy can reach 0.05mm/m.

HTS has provided high-quality flange end repair services for customers such as PetroChina, Sinopec, CNOOC, Sinochem, Yanchang Petroleum, many local refineries and local chemical enterprises.


  Sealing surfaces of defective flanges often fail to meet the sealing requirements during use, especially for some non-standard parts, large-scale equipment or pipeline flanges, it is not realistic to replace all new flanges or equipment due to the influence of construction period, cost and other factors.

    On-site flange repair technology can solve these problems, and can repair the damaged flange on-site. It has the advantages of short construction period and low cost, and the repaired flange can meet the performance requirements of design and use.


    Complete Sets of Professional Equipment

HTS has several sets of portable face machines, beveling machines and drilling machines, which can work on-site in multiple groups at the same time to meet different needs of the site.


    Technical Strength 

HTS adheres to the concept of technology first, and its technical team has rich field experience and is good at solving various difficult problems quickly.


    Service Ability 

HTS adheres to the aim of responding quickly to customers' requirements, and provides on-site technical support within 24 hours to solve any on-site problems quickly and timely.

The size range of repairable flanges is from DN10 to DN3000.

Pipe cutting and grooving range from DNSO to DN3000. 

On-site drilling can drill to ?300.

HTS has provided high-quality flange end repair services for customers such as PetroChina, Sinopec, CNOOC, Sinochem, Yanchang Petroleum, many local refineries and local chemical enterprises.

  1. Modular design, suitable for field installation and operation. 

  2. Fixed with four claws and eight claws and reliable installation.

  3. It can be installed horizontally, vertically, upside down and obliquely.

  4. Wide adjustable range of rotating speed, suitable for different processing requirements.

  5. 360-degree rotating tool holder makes it possible to process various special flange surfaces.

  6. Screw gear transmission ensures the surface finish of machining.

  7. High-precision cross rolling bearings and horizontal linear guide rails designed with preload can eliminate the slight deformation caused by machining load and ensure the machining accuracy.


1.ASME PCC-1-2013《壓力邊界螺栓法蘭連接裝配指南》

2.HTS法蘭修復程序文件

3.ASME B16.5 《管法蘭和法蘭管件(NPS萬- NPS 24”)》

4.ASME B16.47 《大直徑管鋼制法蘭(NPS 26"-NPS 60”)》

5.HG/T 20592 《鋼制管法蘭(PN系列)》

6.HG/T 20615 《鋼制管法蘭(Class系列)》

7.HG/T20623 《大直徑鋼制管法蘭(Class系列)》

8.SH/T3406 《石油化工鋼制管法蘭》


Contact Us

  • Tel:010-63748808 / 15811338118
  • E-mail:hts@htschina.com
  • Fax:010-83607808
  • AddressRoom 1601, Blog Xinghuo Keji, No.2 Fufeng Road, Fengtai District, Beijing, China
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