Drawing Markup Per ASTM Y14

[tnboy82]

There has been much disagreement between the drafters at work about the following situation. Any opinions (particularly those with ASTM Y14 reference, if the topic is covered by ASTM Y14, so that it can be settled once and for all!)

I work for a piping supplier, and when we receive our contract documents the estimators color code the lines in order to know what they have taken off. Then the drafter who prepare shop drawings for customers also color code the lines which they have finished drawing in order to keep up with what has been drawn.

There is much disagreement about what color scheme should be used. The traditional way at our company is to use red pencil to mark line that have been estimated, and then green when shop drawings are produced.

The new guys coming in, as well as some of the old timers say that yellow should be used to color code the drawing for materials that have been estimated then drawing drafter use whatever.

This sounds like a bunch of kids arguing over crayons, but it is an issue. Our supervisor's solution is to tell everyone to use whatever scheme they would like, just make a key on the front of the drawings for the person behind you to follow.

Personally, I think that we shouldn't color code at all, as I think some people use that as a crutch instead of studying and becoming familiar with the drawings. But sometimes that isn't practical in large pipe galleries.

Any opinions? Thanks in advance.

 

[MadMango]

ASME Y14.xx is an expansive set of documents. Some places to look would be:

ASME Y14.100-2000 Engineering Drawing Practices
ASME Y14.24M-1999 Types and Applications of Engineering Drawings
ASME Y14.35M-1997 Revision of Engineering Drawings & Associated Documents

I am not familiar with the piping industry. In the mechanical world, Red is for changes, Yellow is for completed changes. I remember seeing a document that defined what color of ink (including pencil) should be used for sign-off, but it might have been an adopted internal document.

"Art without engineering is dreaming; Engineering without art is calculating."

Have you read faq731-376 to make the be

 

[ewh]

Are you asking about
ASTM (American Society for Testing and Materials) standards or
ASME (American Society of Mechanical Engineers) standards (previously ANSI) standards?

Believe it if you need it or leave it if you dare. - [small]Robert Hunter[/small]

 

[fcsuper]

I don't know that there is standard Drafting colors per se. But my impression is that there are archaic secretarial conventions. There may be some legal conventions as well (nothing like ASME though). I think this is the closest you'll come, but I could be wrong.

At one company, we used an internal convention, but that is because we allowed too much input during the approval process. If this is an issue for you, I might suggest a solution is to treat the approval process as go-no-go (accept or reject, comments made at the discretion of the reviewers).

If this is just internal to the Drafting Dept, I agree with you in your assessment.



Matt Lorono
CAD Engineer/ECN Analyst
Silicon Valley, CA
Lorono's SolidWorks Resources
Co-moderator of Solidworks Yahoo! Group
and Mechnical.Engineering Yahoo! Group

 

[tnboy82]

This color coding of lines is indeed for internal use only. By which I mean, only the drafters in our department will see these contract drawings.

The color coding has nothing to do with the review and revise process internally, in fact, we have a very "unstructured" peer review process for our scopes and shop drawings. Which I find fairly disturbing.

To better undertand the situation, here is the color scheme that I use:

Green is existing material & material that we are not estimating/drawing/supplying.
Yellow is material that we are estimating/drawing/supplying.
Orange is material that we may or may not estimate/draw/supply, base on bid alternates, contractor options, etc.

Anyway, I will check the applicable sections of ASME (I don't know why I wrote ASTM in the initial post)that have been posted. Thanks for you help.

 

[KENAT]

tnboy82, I doubt you'll find anyting significant in ASME drawing standards.

In fact I'm not aware of even any general industry practice or similar like there is for annotating 'checking' of drawings. Others in the piping industry may know differently.

I think you may have to agree amongst your selves and then create a company standard.

I will say that red tends to have connatations so yellow may be a better option.

KENAT, probably the least qualified checker you'll ever meet...

 

[CheckerRon]

Most of the colors I have seem in piping lines (mostly schmetics) defined the media being routed. That is different colors for air, water, DI H2O, nitrogen, argon,
vacuum, etc.

Regarding the drafting room conventions,as others have said, you would do well to write a Drafting Room Manual and define your practices.

Easier said than done, since from personal experience, it takes a lot of research, discussion and disagreement, and management muscle to get one written, approved and force people to comply with it.

 

[fcsuper]

I think the peer review is the main issue driving this (based on your description). One possible solution is to elimenate the peer review, either with a formal checker or within your "chain of command". If drawings are being passed around (which is what it sounds like), this is too much input to be of value. It is kinda like wikidrafting.

Matt Lorono
CAD Engineer/ECN Analyst
Silicon Valley, CA
Lorono's SolidWorks Resources
Co-moderator of Solidworks Yahoo! Group
and Mechnical.Engineering Yahoo! Group

 

[KENAT]

fcsuper, I dont' think this is a drawing checking type question. It's a question of how top level schematics or similar are marked up to indicated who/what department is doing what. I could be wrong though, wouldn't be the first time.

KENAT, probably the least qualified checker you'll ever meet...

 

[tnboy82]

Thank you all for your input. I think that what needs to be done is as KENAT suggested. We need to set an internal standard protocol and follow it.

 

[MadMango]

I don't quite understand these color options. What happens to this documented information when a section of the print is photocopied or faxed? Usually you end up with black and white prints- loss of data. It seems selection of line styles would be a safer practice, but like I said, I have no experience of the piping industry to base my thoughts upon.

"Art without engineering is dreaming; Engineering without art is calculating."

Have you read faq731-376 to make the be

 

[fcsuper]

KENAT,

Yeah, I know the intent of the question. I just have a bad habit of cutting to the chase...the "What is this question being asked in the first place?" kinda thing. Sometimes the cut is too depth, and sometimes it's in the wrong direction.

Matt Lorono
CAD Engineer/ECN Analyst
Silicon Valley, CA
Lorono's SolidWorks Resources
Co-moderator of Solidworks Yahoo! Group
and Mechnical.Engineering Yahoo! Group