Backing Rings. When joining two pipes, ensuring that they are properly aligned, held together, and to prevent leaks, a small piece of material called a backing ring is necessary. Backing rings can be either round, or square and are made typically from rubber or a metal such as chrome, carbon steel, or aluminum.
O n March 6, 1961 President John F. Kennedy issued Executive Order 10925, which included a provision that government contractors take affirmative action to ensure that applicants are employed, and employees are treated during employment, without regard to their race, creed, color, or national origin..he intent of this executive order was to affirm the government's commitment to equal opportunity for all qualified persons, and to take positive action to strengthen efforts to realize true equal opportunity for all. This executive order was superseded by Executive Order 11246 in 1965.
Making the world better, one answer at a time. John F Kennedy passed the Civil Rights Act of 1964. He didn't actually pass it, Lyndon B. Johnson, the new president passed it because Kennedy was assisinated in Novemeber 1963. John Fitzgerald Kennedy, President of the United States of America  was shot to death by Lee Harvey Oswald on November 22 1963 in  Dallas, Texas A commission of enquiry: The Warren Commission,  concluded that Oswald was acting alone and that no other person or  persons was involved.