Tag: RR-C-271

New RR-C-271 Revision G

RR-C-271, “Chains and Attachments, Carbon and Alloy Steel,” has just been updated.  The new Revision G is available now from Document Center Inc. in both paper format and for pdf download.  It is a major revision, with changes too extensive to notate in the update.

The new RR-C-271 Revision G replaces the previous Revision F from 2011.  The document is used in Federal Procurement for the U.S. government.  As federal specification, it is also widely used in U.S. DoD contracts and across industry as well.  You’ll find that the specification covers carbon and alloy steel chain, commercial quality, and the attachments most often used with this type of chain.

Will you find all types, grades, classes and styles of this type of chain in this document?  No, just the ones that are used to meet Federal requirements.

How much information is in the RR-C-271?  There are 61 pages in  this document.  The publication starts with the usual scope and referenced documents sections.  Then follows a 35-page requirements clause with extensive tables and figures to define all of the many parts included in the document.  Quality requirements are reviewed next.  Then  Section 5 covers packaging, and Section 6 completes the document with various notes.  There are two appendices for your use.  Appendix A is on the PIN (Part Identification Number) system.  Appendix B covers the various material requirements (what kind of alloy is acceptable for eaach of the chains and attachments).

Why get your copy from Document Center Inc.?  Document Center offers you both “best in class” notifications of any changes to the standards that you purchase from us.  Our customers receive timely email notification when there are updates to the standards they use.  And should you want to talk with someone about any standard and how to use it properly, our knowledgeable staff is available to you via phone (650-591-7600) and/or email (info@document-center.com).  Search for and order standards online at our webstore, www.document-center.com.  Here’s the direct link to the order page for RR-C-271.  Make us your Standards Experts!

RR-C-271 Revision F released on Chains and Attachments, Carbon and Alloy Steel

Federal Specification RR-C-271 Revision F has just been released.  Titled “Chains and Attachments, Carbon and Alloy Steel,” the specification covers carbon and alloy steel chain of commercial quality together with the attachments most commonly used with this type of chain.  The RR-C-271F replaces the now-obsolete RR-C-271E from December 2010.

The 45 page revision covers the following classes and styles for Type I welded steel chain:

Class 1 – Alloy chain (overhead lift), Class 2 – High-test chain, Class 3 – Transport chain, Class 4 – Proof-coil chain and for Class 5 – Twist-link chain – Style 1 – Long-link pattern (coil) and Style 2 – Short-link pattern (machine)

For Type II weldless (forged and casting) chain, the following classes are included:

Class 1 – Single-loop pattern chain, Class 2 – Double-loop pattern chain, Class 3 – Sash chain, Class 4 – Flat-link chain, Class 5 – Bead chain, Class 6 – Plumber’s chain, Class 7 – Single-jack chain, Class 8 – Double-jack chain, Class 9 – Ladder chain, Class 10 – Register chain, and Class 11 – Mechanical communication chain.

Federal specifications do not include all types, grades, classes, and styles of the commodities indicated by the title of the specification, or which are commercially available, but are intended to cover the types that are suitable for Federal Government requirements.

The RR series of Federal Specifications covers end products purchased by the U.S. Government that are made of metal.  So some items in this grouping include metal paper napkin dispensers and chain link fencing.  Many of the documents in the series have been canceled long ago, replaced by commercial item descriptions (CID’s) or withdrawn without replacement.

With new revisions of government standards, you may or may not find clear notation of the changes from the previous edition.  If you’re lucky, there will be lines in the margins (or sometimes asterisks) bringing those areas to your attention.  However, in the case of RR-C-271F, section 6.5 notes that identification of changes with respect to the previous issue are not present due to the extensive changes.

RR-C-271 and all Federal Specifications can be purchased from our website, www.document-center.com.  Or contact Document Center staff by phone (650-591-7600), fax (650-591-7617) and email (info@document-center.com).  Many obsolete copies of Federal documents are available from us as well.