| MATERIAL |
All pipes and fittings are manufactured from stainless steel sheet
or plate to ASTM A-240 standards. Material 10 gauge and lighter will
have No. 2D or better finish, material 3/16" and heavier will have
No. 1 finish. Type of stainless steel shall be specified by the customer. |
| WELDING |
Welding procedures, welders and welding operators meet the requirements
of ASME Code Sec. IX. Welding procedures are carefully established
and tested to achieve full penetration welding. The longitudinal welds
in pipes and fittings are made either by the automatic GTAW with or
without filler metal, the automatic GMAW (spray transfer) or the automatic
plasma arc welding process. Gas back-up protection is provided in
all cases. |
| FORMING |
Pipe shall be carefully die-formed or rolled true to dimension and
round within a tolerance of plus or minus 1/16". The two edges of
sheet are brought in line so as not to leave a shoulder on the inside
of the pipe. Ends of pipe and fittings are to be perpendicular to
the longitudinal axis. Pipes shall be straight within maximum of 1/8"
deviation over 10-feet. The consumables are of a grade similar to
the base material and always of the extra low carbon grade. Weld reinforcement
does not exceed 0.063" at the inside surface and 0.094" at the outside
surface. Surface finish of welds is left as welded. However, grinding
and polishing can be done upon request. |
| CLEANING |
All pipes and fittings are pickled in an acid solution and rinsed
thoroughly with clean water. |
| INSPECTION |
Our aim is to produce a good quality product. To this end, tools,
dies, jigs, and fixtures used throughout the manufacturing process
are periodically inspected in order to ensure that dimensional tolerances
are observed. All pipes, fittings and assemblies are visually inspected
and random radiographic examination of welds is undertaken to the
extend necessary to ensure good quality welding. |
| PRESSURE RATING |
Pressure ratings of pipe and fittings are listed under the Pipe
and Fittings Specification page. |
