We need to clarify on following points on pipe fittings and flanges

Reference: Appendix 22 Page number 13, 14, 27, 28
For CS1, CS6

•	Flanges – will all sizes be Stub end lap joint?
•	 Page 13 -In the description for Elbow ELL 900SW CL3000 and ELL 450 SW CL3000 is mentioned. Are these 90 deg and 45 deg respectively?
•	Is ERW piping is allowed above 80NB?
•	Is the pipe bend allowed in the system?
•	Reducers below 80 NB there is no specification provided in the appendix. Please guide.
•	Please clarify on the range for reducer’s small end and large end sizes.
