New SAE J200 2011 Edition on Classification System for Rubber Materials

SAE J200 2011 Edition, “Classification System for Rubber Materials,” has just been released.  This classification system tabulates the properties of vulcanized rubber materials (natural rubber, reclaimed rubber, synthetic rubbers, alone or in combination) that are intended for, but not limited to, use in rubber products for automotive applications.  This new revision replaces the previous 2008 Edition, which is now obsolete.

Ground Vehicle Standard SAE J200 is the under the jurisdiction of SAE Committee on Automotive Rubber Specifications (CARS).  CARS Works closely with and receives input from ASTM Subcommittee D11.30 on Classification of Rubber Compounds with the goal to keep SAE J200 and ASTM D2000 (“Standard Classification System for Rubber Products in Automotive Applications”) technically equivalent.

This document may serve many of the needs of other industries in much the same manner as SAE numbered steels. It must be remembered, however, that this system is subject to revision when required by automotive needs. It is recommended that the latest revision always be used.

This document is based on the premise that all rubber materials intended for use in rubber products can be arranged into characteristic designations. These designations are determined by types, based on resistance to heat aging, and classes, based on resistance to swelling by oil. Basic levels are thus established which, together with values describing additional requirements, permit complete description of the quality of all rubber materials.  In all cases where provisions of this document would conflict with those of the detailed specifications for a particular product, the latter shall take precedence.

When the rubber product is to be used for purposes where the requirements are too specific to be completely prescribed by this classification system, it is necessary for the purchaser to consult the supplier in advance to establish the appropriate properties, test methods, and specification test limits.

SAE J200 2011 Edition and all SAE Standards and other documents, both current and obsolete, are available from Document Center Inc.  You can use the Document Center website, www.document-center.com, or phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com) us to place your order or to get additional information on any standard you may need.

New ISO 26262 Series released on Road vehicles — Functional safety

The new ISO 26262 series has just been issued.  It’s been on our watch list for most of 2011!   ISO 26262 addresses possible hazards caused by malfunctioning behavior of electrical and/or electronic (E/E) safety-related systems, including interaction of these systems.  These types of hazards have been the basis of a number of vehicle recalls here in the U.S., so the release of this standards set is timely.

The series does not address hazards related to electric shock, fire, smoke, heat, radiation, toxicity, flammability, reactivity, corrosion, release of energy and similar hazards, unless directly caused by malfunctioning behaviour of E/E safety-related systems.

ISO 26262 is intended to be applied to safety-related systems that include one or more electrical and/or electronic systems and that are installed in series production passenger cars with a maximum gross vehicle mass up to 3 500 kg.  ISO 26262 does not address unique E/E systems in special purpose vehicles such as vehicles designed for drivers with disabilities.

Systems and their components released for production, or systems and their components already under development prior to the publication date of ISO 26262, are exempted from the scope.  For further development or alterations based on systems and their components released for production prior to the publication of ISO 26262, only the modifications will be developed in accordance with ISO 26262.

ISO 26262 does not address the nominal performance of E/E systems, even if dedicated functional performance standards exist for these systems (e.g. active and passive safety systems, brake systems, Adaptive Cruise Control).

ISO 26262-1:2011, “Road vehicles — Functional safety — Part 1: Vocabulary,”  specifies the terms, definitions and abbreviated terms for application in all parts of ISO 26262.

ISO 26262-2:2011, “Road vehicles — Functional safety — Part 2: Management of functional safety,” specifies the requirements for functional safety management for automotive applications, including the following:

  • project-independent requirements with regard to the organizations involved (overall safety management), and
  • project-specific requirements with regard to the management activities in the safety lifecycle (i.e. management during the concept phase and product development, and after the release for production).

ISO 26262-3:2011, “Road vehicles — Functional safety — Part 3: Concept phase,” specifies the requirements for the concept phase for automotive applications, including the following:

  • item definition,
  • initiation of the safety lifecycle,
  • hazard analysis and risk assessment, and
  • functional safety concept.

ISO 26262-4:2011, “Road vehicles — Functional safety — Part 4: Product development at the system level”  specifies the requirements for product development at the system level for automotive applications, including the following:

  • requirements for the initiation of product development at the system level,
  • specification of the technical safety requirements,
  • the technical safety concept,
  • system design,
  • item integration and testing,
  • safety validation,
  • functional safety assessment, and
  • product release.

ISO 26262-5:2011, “Road vehicles — Functional safety — Part 5: Product development at the hardware level,” specifies the requirements for product development at the hardware level for automotive applications, including the following:

  • requirements for the initiation of product development at the hardware level,
  • specification of the hardware safety requirements,
  • hardware design,
  • hardware architectural metrics, and
  • evaluation of violation of the safety goal due to random hardware failures and hardware integration and testing.

The requirements of ISO 26262-5:2011 for hardware elements are applicable both to non-programmable and programmable elements, such as ASIC, FPGA and PLD. Furthermore, for programmable electronic elements, requirements in ISO 26262-6, ISO 26262-8:2011, Clause 11, and ISO 26262-8:2011, Clause 12, are applicable.

ISO 26262-6:2011, “Road vehicles — Functional safety — Part 6: Product development at the software level,” specifies the requirements for product development at the software level for automotive applications, including the following:

  • requirements for initiation of product development at the software level,
  • specification of the software safety requirements,
  • software architectural design,
  • software unit design and implementation,
  • software unit testing,
  • software integration and testing, and
  • verification of software safety requirements.

ISO 26262-7:2011, “Road vehicles — Functional safety — Part 7: Production and operation,” specifies the requirements for production, operation, service and decommissioning.

ISO 26262-8:2011, “Road vehicles — Functional safety — Part 8: Supporting processes,” specifies the requirements for supporting processes, including the following:

  • interfaces within distributed developments,
  • overall management of safety requirements,
  • configuration management,
  • change management,
  • verification,
  • documentation,
  • confidence in the use of software tools,
  • qualification of software components,
  • qualification of hardware components, and
  • proven in use argument.

ISO 26262-9:2011, “Road vehicles — Functional safety — Part 9: Automotive Safety Integrity Level (ASIL)-oriented and safety-oriented analyses,” specifies the requirements for Automotive Safety Integrity Level (ASIL)-oriented and safety-oriented analyses, including the following:

  • requirements decomposition with respect to ASIL tailoring,
  • criteria for coexistence of elements,
  • analysis of dependent failures, and
  • safety analyses.

An additional part 10, ISO-26262-10:2011, “Road vehicles — Functional safety — Part 10: Guideline on ISO 26262,” is expected to be released shortly.

All current ISO standards, and many obsolete editions, may be purchased from Document Center Inc. using our website, www.document-center.com.  Or consider contacting us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).

I was reminded over the weekend how much people appreciate the fact that our staff is available to immediately answer your phone calls, faxes and emails during our business hours of 6 am to 5 pm Monday through Friday California time.  Knowing our phone is answered by a person, not a phone tree, and that Document Center responds to questions in a matter of minutes instead of a matter of days is really appreciated by our customers.

Whatever happened to QQ-P-35, Passivation Treatments for Corrosion Resistant Steel?

QQ-P-35, “Passivation Treatments for Corrosion Resistant Steel,” is another government document that was cancelled due to the implementation of the National Technology Transfer and Advancement Act in the mid-1990’s.  The public law, known as NTTAA, directs Federal Agencies to use technical standards “that are developed or adopted by voluntary consensus standards bodies.”  Since QQ-P-35 was a Federal Specification it was an obvious candidate for replacement with a U.S. industry standard.

QQ-P-35 was originally issued in July 1963.  Revision C from 1988 was withdrawn by Cancellation Notice 3 on 9/11/1998.  The Cancellation Notice specifies that QQ-P-35 can be replaced by both ASTM A967 and AMS QQ-P-35.  This shows the use of two types of replacement documents:  1) a pre-existing standard (ASTM A967) and 2) a standard that is a republication of the withdrawn government to migrate the caretaking of the standard from a government organization to an industry one (AMS QQ-P-35).

The other interesting point about this particular superseding history is that seven years after the AMS republication of the specification, the document (AMS QQ-P-35) was itself cancelled in favor of another AMS standard, AMS 2700.  This actually was possible because of government participation in the committee that writes the AMS 2700 standard.  With the publication of Revision B in February 2004, issues in the previous edition of the document that made it unsuitable for government usage were resolved.  Thus the final migration to an industry standard was made possible.

So now, the current replacements for QQ-P-35 are the ASTM A967, “Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts,” and AMS 2700, “Passivation of Corrosion Resistant Steels.”

In actuality, the number of government documents that were republished in this way in order to facilitate migration to industry-sponsored standards is relatively small.  It was certainly made possible because the federal level government documentation is not covered by copyright.  And by this time, many of those republications have been revised or withdrawn as well.

Should you have an obsolete document and need to know what it was replaced by, contact Document Center staff by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  We’ve been keeping records on standards since 1982 and for many items, our history information goes back much further.

All current Federal Specifications can be purchased at our website, www.document-center.com.  Many obsolete revisions are available, along with the documents that have replaced them.

MIL-C-81904, Coating Compound, Thermal-Insulation, Ablative, renumbered MIL-PRF-81904 with the release of new Revision C

MIL-PRF-81904 Revision C, titled “Coating Compound, Thermal-Insulation” has just been issued.  It is the replacement for MIL-C-81904 Revision B (“Coating Compound, Thermal-Insulation, Ablative,”) from 1991.  This specification covers asbestos-free, thermal-insulating coating compound.  The thermal protection coating is used for the exterior surfaces of aircraft ordnance to delay cook-off during exposure to a liquid fuel fire.

Marginal notations are not used in this 27-page revision to identify changes with respect to the previous issue due to the extent of the changes.

The change of the document identifier MIL-C-81904 to the new designation MIL-PRF-81904 reflects one of the many changes to military specifications and standards during mil spec reform in the mid-1990’s.  Because the military was directed to reduce dependence on internally generated documentation and move to industry standards where-ever possible, there was a need to identify those items that were unique to the military and needed to be maintained in the new regulatory environment.

It was determined that essential military specifications would be segregated into two types of documents:  Performance Specifications and Detail Specifications.  The detail specification would provide instructions on manufacturing something to an exact blueprint (e.g., uniforms).  Whereas performance specifications would define the performance requirements needed for a particular item and leave it up to the manufacturer to determine how to meet those requirements (for example, development of a sleeping bag to be used in extremely cold weather).

When a document number is modified to show that it is either a performance specification (MIL-PRF-) or a detail specification (MIL-DTL-), it then can be called out in military procurement with confidence that the document is valid in the post-mil spec reform world.

All military specifications and standards, both current and many obsolete) can be purchased on the Document Center Inc. website, www.document-center.com.  Or you may want to call us (650-591-7600), fax us (650-591-7617) or send us an email (info@document-center.c0m).  The many changes to DoD documents can be challenging.  We’d be happy to help you understand them.

 

 

ESD Association document types and our list of ESD Standards

Understanding the various document numbering schema from Standards Developing Organizations (SDO’s) can be challenging for the beginning Standards Specialist.

In reviewing the standards available for Electronic Discharge Control, standards from the ESD Association top the list.  What are the different designations for these ESD standards and what do they mean?  Here’s the definitions:

  • Standard (S): A precise statement of a set of requirements to be satisfied by a material, product, system or process that also specifies the procedures for determining whether each of the requirements is satisfied.
  • Standard Test Method (STM): A definitive procedure for the identification, measurement and evaluation of one or more qualities, characteristics or properties of a material, product, system or process that yield a reproducible test result.
  • Standard Practice (SP): A procedure for performing one or more operations or functions that may or may not yield a test result. Note, if a test result is obtained it is not reproducible.
  • Technical Report (TR): A collection of technical data or test results published as an informational reference on a specific material, product, system or process.

Our webpage, Some of our best selling Electrostatic Discharge Control (ESD) Standards (with Links to the Current Document), contains a list of the ESD standards we commonly sell.  You can easily link from the page to each individual document to check the status of the document and order if needed.

Or consider looking up a document you need to order directly on our website, www.document-center.com.  You can also contact us by phone (650-591-7600), fax (650-591-7617) and email (info@document-center.com).  We’re here to help you with all your standards needs.

New CGA G7.1, 2011 Edition, Commodity Specification for Air

There’s a new CGA G7.1 6th Edition, “Commodity Specification for Air.”  The 12 page specification describes the requirements for air.  It is dated October 13, 2011 and replaces the 5th Edition from 2004.  It was formerly known as ANSI-Z86.1, “Breathing Air.”

The widely used document provides data concerning quality verification systems, sampling, analytical procedures, containers, typical uses for various grades (QVLs) and supplemental specification tables.  A previous  edition (1989) is cited in 29 CFR.

It should be noted that this specification covers air, including medical-grade air, but not oxygen.  If you require a specification for oxygen, you need to use CGA G4.3, “Commodity Specification for Oxygen.”

CGA G7.1 and all Compressed Gas Association standards can be purchased from our Document Center website, www.document-center.com.  Or contact us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  Our staff will be happy to assist you with any standards requirements you may have.

 

New ISO 1043-1 and ISO 1043-2 2011 Editions on Plastics – Symbols and abbreviated terms

Both ISO 1043-1 4th Edition, “Plastics – Symbols and abbreviated terms – Part 1: Basic polymers and their special characteristics,” and ISO 1043-2 3rd Edition, “Plastics – Symbols and abbreviated terms – Part 2: Fillers and reinforcing materials,” have just been released.

ISO 1043-1:2011 defines abbreviated terms for the basic polymers used in plastics, symbols for components of these terms, and symbols for special characteristics of plastics. It includes only those abbreviated terms that have come into established use and its aim is both to prevent the occurrence of more than one abbreviated term for a given plastic and to prevent a given abbreviated term being interpreted in more than one way.

Guidance for the preparation of new abbreviated terms, reference lists of symbols for the components of plastics terms used to form the abbreviated terms for plastics, and a classification of abbreviated terms for polymers grouped by type are given in annexes.

ISO 1043-2:2011 specifies uniform symbols for terms referring to fillers and reinforcing materials. It includes only those symbols that have come into established use, and its main aim is both to prevent the occurrence of more than one symbol for a given filler or reinforcing material and to prevent a given symbol being interpreted in more than one way.

The other 2 standards in the series are:

  • ISO 1043-3, Plastics – Symbols and abbreviated terms – Part 3: Plasticizers
  • ISO 1043-4, Plastics – Symbols and abbreviated terms – Part 4: Flame retardants

Part 3 is scheduled for review and possible revision, Part 4 is stable.

All ISO standards are available from Document Center Inc. at our website, www.document-center.com.  Or consider contacting us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  We can also monitor your standards collection and help you understand the relationship between the original ISO standards and the many adoptions and reprints that are out there.

New AS 39029 Revision C released on Contacts, Electrical Connector, General Specification For

There’s a new Aerospace Standard AS 39029 Revision C (also known as AS39029).  Titled “Contacts, Electrical Connector, General Specification For,” the new 93-page edition makes corrections to bring the document into alignment with the draft originally approved for the previous release.  Apparently inappropriate information on PdNi plating requirements were included in Revision B that were not part of the draft approved for that edition.

AS 39029C covers the general requirements for removable crimp, solderless wrap, and solder type electrical contacts for use in connectors and other electric and electronic components (section 6.1). These contacts are specified to be capable of operating within defined temperature ranges (section 3.1).

Four types of contacts and bushings are included in the standard:

  • A) Copper Alloy
  • B) Ferrous Alloy
  • C) Nickel-Chromium (formerly Chromel), Nickel-Aluminum/Silicon (formerly Alumel), Copper-Nickel Alloy (formerly Constantan), Iron and Copper
  • D) Copper Alloy

There are quite a number of specification sheets for AS39029 (over a hundred).    Each covers a unique type of contact.  The series replaced the now obsolete MIL-C-39029 specifications issued by the Department of Defense.

Both the AS Aerospace Standards and the MIL Specs are available from Document Center Inc. at our website, www.document-center.com.  Or contact us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  We’re happy to assist you with any questions you might have.

New IPC 4204 Revision A, Flexible Metal-Clad Dielectrics for Use in Fabrication of Flexible Printed Circuitry

IPC 4204 A, “Flexible Metal-Clad Dielectrics for Use in Fabrication of Flexible Printed Circuitry,” has just been released.  The new 53-page revision establishes the classification system, the qualification and quality performance requirements for flexible metal-clad dielectric materials to be used for the fabrication of flexible printed circuitry and flexible flat cable.  It replaces the previous May 2002 edition of the standard (and IPC-FC-241C as well).

IPC 4204 includes 12 specification sheets that result from the combinations of various copper foil claddings; a polymer base dielectric selected from at least two polyesters, multiple polyimides or liquid crystal polymers; and at least seven versions of polymer adhesives as well as adhesiveless bonding agents. The net result of these material combinations provide the industry with suitable clad, flexible dielectrics for fabricating flexible printed circuitry interconnections.

All IPC standards can be purchased from Document Center Inc. via our website at www.document-center.com.  Or contact us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).

And we hope that your holiday season is off to a good start!

AMS 2700 Revision E just released on Passivation of Corrosion Resistant Steels

AMS 2700 Revision E, “Passivation of Corrosion Resistant Steels,” has just been released.  The new edition replaces AMS 2700 Revision D which was released back in July of this year.  The specification covers the requirements for a process to assure removal of free iron or other less noble contaminants from the surfaces of corrosion resistant steel parts.

There are two passivation methods covered by AMS 2700E — Passivation in Nitric Acid and Passivation in Citric Acid.

For the first method, 8 types may be specified:

  • Low Temperature Nitric Acid with Sodium Dichromate
  • Medium Temperature Nitric Acid with Sodium Dichromate
  • High Temperature Nitric Acid with Sodium Dichromate
  • 40% Nitric Acid for Free Machining Steels
  • Anodic, for High Carbon Martensitic Steels
  • Low Temperature Nitric Acid
  • Medium Temperature Nitric Acid
  • Medium Temperature, Nigh Nitric Acid Concentration

The processes defined in this specification have been used typically to dissolve metallic elements from the surfaces of corrosion resistant steels to improve their corrosion resistance, but usage is not limited to such applications.

The new AMS 2700 and all SAE Standards may be purchased from Document Center Inc. on our website, www.document-center.com.  Or contact us by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  We have many obsolete SAE documents available, with extensive information on the revision history on the website.