"DD pipe" isn't a standard term, but context suggests it likely refers to pipe sizing in design drawings (Design Development, often showing inner diameter 'd' or Nominal Diameter 'DN') or, in computing/Linux, the dd command piping data. In design, 'd' means inner diameter; in Linux, dd is a command-line utility for copying/converting data, often piped (e.g., dd | gzip) for efficiency.
dear/darling daughter (used, especially by women, in digital communications to refer to one's daughter). DD moving into her own apt today! designated driver. Department of Defense. dishonorable discharge.
Systems Coordination: The Design Development (DD) phase supports architects to integrate various building systems, including structural, mechanical, electrical, and plumbing, to ensure seamless operation.
That was the inside diameter (I.D) of the pipe.
A demand draft (DD) is a prepaid negotiable instrument issued by a bank, guaranteeing payment to the beneficiary. It is drawn by one bank branch on another and can be used to transfer funds across cities or states. Unlike cheques, a DD cannot bounce due to insufficient funds as the amount is prepaid by the issuer.
Demand Draft or DD refers to a financial instrument used to make payments, which can be used by an individual or a bank. Demand Draft is a secure way to transfer funds from one account to another easily. It is different from cheque since the account holder's signature is not required for a Demand Deposit.
They are widely used for reliable and secure transactions, especially when huge sums of money are involved or when the parties involved have no mutual trust. The financial institution issuing the DD assures the payment. Thus, ensuring that the beneficiary receives the amount on presenting the draft.
OD is typically used for PVC pipes and fittings, especially in plumbing-based setups. Knowing which measurement applies to each component ensures compatibility across hoses, pipes, and connectors, making setup easier and your system more efficient.
IS 12288: Code of Practice for Use and Laying of Ductile Iron Pipes.
In other words, for a given DR or SDR, pressure capacity and pipe stiffness remain constant regardless of pipe size. Even though the terms DR and SDR are synonymous, one minor difference between them is that SDR refers only to a particular series of numbers, i.e., 51, 41, 32.5, 26, 21, etc.
The Design Development (DD) phase includes design advancement based on floor plans and exterior ideas approved in the SD phase. Defining and developing important project aspects, generating drawing sets, and outlining specifications for potential contractor cost estimates are done in the DD phase.
The nominal dimension for pipe is the ID. So, 1½ inch pipe is NOT 1½ inch outside diameter, but instead is nominally, (approximately) 1½ inch inside diameter. Pipe is typically manufactured to looser tolerances and less expensive to purchase.
Dunny diver — a plumber Example: “The toilet's clogged up again. Better call the dunny diver to sort it out.” Chippy — a carpenter Example: “The chippy did a ripper job on those cabinets, mate.
In Internet slang, DH is an abbreviation for dear husband; it is commonly used by women on certain forums to refer to their husbands. Similarly, DD means dear daughter and DS means dear son. The Oxford Dictionary of English dates the origin of DH to the 1990s.
A DD Code is a unique code related to the bank branch or transaction type for the demand draft.
Examples
When it comes to durability, ductile iron is generally considered to be more durable than cast iron. Ductile iron is less brittle than cast iron, even before heat treatment. It does not fracture as easily with impact. Being ductile allows the iron to bend.
Ductile iron pipe is pipe made of ductile cast iron commonly used for potable water transmission and distribution.
The North American refrigeration industry uses copper pipe designated ACR (air conditioning and refrigeration field services) pipe and tubing, which is sized directly by its outside diameter (OD) and a typed letter indicating wall thickness.
The 2021 IPC® provides minimum regulations for plumbing facilities and provides for the acceptance of new and innovative products, materials, and systems.
Schedule 20: Known for its thinner walls, Schedule 20 is suitable for low-pressure applications. It's lightweight and easy to handle, making it perfect for household vacuum systems. Schedule 40: This is the most common type, with thicker walls than Schedule 20.
Demand Draft is the full form of DD. A DD is a prepaid instrument, but it's not freely negotiable like a cheque; it's generally payable to the named payee and is not transferable.
A demand draft (DD) remains a trusted and secure financial instrument for hassle-free monetary transactions. Its prepaid nature ensures guaranteed payments, making it ideal for high-reliability scenarios, such as business deals, educational fees, or real estate transactions.
1. dear or darling daughter: often used facetiously in social media. 2. Also: dd. direct debit.