SIGMA’s “Hero Product” Approaches its 40th Anniversary: Municipal Construction Castings
SIGMA first made waves in the US waterworks market with its range of Municipal Construction Castings products. As the company now approaches its 40th Anniversary, SIGMA remains the ONLY true national supplier of Municipal Construction Castings, with products installed in all 50 states.
SIGMA offers a wide range of heavy castings such as Manhole Rings and Covers, Frames and Grates, and Curb Inlets. Furthermore, SIGMA services the light castings market by supplying Valve Boxes, Curb Boxes, Meter Boxes, Risers, and Lids. Castings meet different traffic conditions such as Non-Traffic, Light, Medium and Heavy-Duty load applications.
The company’s engineers and sales and support teams have the expertise and skills to ensure that casting products meet not only ASTM* and AASHTO* standards, but also the specifications demanded by Federal and State departments’, Canada's BNQ* and individual customer’s technical requirements. Products can be certified by external professional engineers, on request.
SIGMA’s castings are approved in major cities and states including:
• City of New York, NY State
• State of Ohio
• Aurora, Colorado
• Colorado Springs, CO
• Greenville, South Carolina
• City of Calgary, Canada
• Washington Suburban Sanitary Commission, Maryland
• Loudoun Water Way, Ashburn, VA
Partnering with the City of New York
SIGMA is the leading supplier of Municipal Construction Castings in New York City. Every order dispatched to New York is first inspected by DDC (Department of Design & Construction), New York. DDC sends their inspector to CRM to witness the Mechanical testing of test bars and load test of castings as per their laid-out inspection plan. Only after DDC approval will the order be shipped to our distributor, T Mina, in New York.
The SIGMA Difference:
According to Sreenivasa Rao, MCC Engineer at SIGMA’s Cream Ridge, NJ, testing facility: “Our quality program is unique in the waterworks industry. We have a special responsibility to our customers, as many of our casting products are made overseas. For this reason, we have designed a stringent quality program that assures reliability to the “3 SIGMA” level. The plan starts with each casting having a cast ID - a “heat number”. This unique ID enables SIGMA to identify the location, foundry number, the date of manufacture, and the production batch”.
In more detail, SIGMA’s quality program consists of a five-step plan:
i) Preparation and implementation of Quality Inspection Procedures (QIP) for every product line.
ii) Audit, inspection and testing of the product at the manufacturing location by SIGMA engineers/inspectors stationed in the factories, prior to shipping.
iii) Qualification data on physical, chemical and microstructure tests submitted by the foundry through Material Test Reports (MTR);
iv) Verification of that data by Incoming Quality Control (IQC) procedures at our facilities in the USA
v) Control of the process through feedback obtained from statistical analysis including Statistical Process Control (SPC) of critical factors
For further information about SIGMA’s Municipal Construction Castings, please reach out to your local SIGMA sales representative for more information. https://www.sigmaco.com/regional-teams
*American Society for Testing and Materials*American Association of State Highway and Transportation Officials*Bureau de normalization du Quebec