Marine Hoses Quality Control Process
1、Coupling
Welding,NDT,Galvanization
Flange Area
- Flange Area
Ⅰ. Flange
Flange Material: ASTM A-105/ASTM A-105C
Equivalent Material Standards: BS 1503:221-430, DIN 17200/SEW 550: C22.8, JIS G 3201 SF 440
Flange Rating: ASME B16.5 Class 150 or Class300 (as per client’s requirement)
Welding Procedures and Welder: ASME IX
Flange MTC
① Material Chemical Composition
② Mechamical Performance: Tensile Test, Impact Test, Hardness Test, Bending Test
③ Visual Inspection
Main Procedures for the Flange Production and Examination: Flange Factory
① Heat Treatment
② Welding
③ Radiographic Examination
④ Magnetic Particle Examination
Flange Re-process Procedure:
① Hot-dip galvanized, min. average coating weight 610g/m2 (equivalent to 85µm thickness)
② Pickled in acid to get rid of the iron scum
③ Grit blasting to get more contact surface
④ Painting Adhesive
⑤ Flange Installed on Mandrel
Marking:
① the year of manufacture and hose serial number will be applied on the rim of each flange
② one flange rim marked with letter “A” and the other with “B”
VH-MARINETECH CO.,LTD is marine hoses manufacturers, The marine hoses were sold to South Korea, Japan, Malaysia Singapore, Australia, Egypt, Netherlands, Belgium and USA.
Marine dredging hoses share the largest percentage of exports in China.
Find trusted arine oil floating hose. Any requirements and problems can ask us at any time.
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